Re: [asterisk-users] ISDN PRI configuration

[Steve Edwards]

My favorite pinout.

http://org.against.org/how-to-create-a-ethernet-crossover-cable/

It's for an Ethernet crossover, but it does make making your own cables 
more enjoyable.


--
Thanks in advance,
-
Steve Edwards   sedwa...@sedwards.com  Voice: +1-760-468-3867 PST
Newline  Fax: +1-760-731-3000

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[giovanni.v]

Il 08/12/2011 18.55, Lyle Giese ha scritto:


And one shield around all the pairs is not the same as ABAM.


I agree, if you run away from the demarc (NT) shielding make a great 
difference in crosstalk, also greater conductor size improve attenuation 
so a full specificaton cable must be used.
But if you are near the NT a 3 meters unshielded ethernet cable fits the 
job without issues.


A little biased but politically correct document:
- http://www.quabbin.com/page2027.html

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Vieri]

Interesting:
"If you cannot obtain T1 specific cable, then use two runs of CAT 5.  Use one 
CAT5 cable for the Transmit (Tx) signal and one CAT5 cable for the Receive (Rx) 
signal.  It is necessary for the Tx and Rx signals to be in separate sheaths to 
prevent cross talk interference"

So pins 1 and 2 on one cable and pins 4 and 5 on another.


--- On Thu, 12/8/11, Lyle Giese  wrote:

> Try this instead:
> 
> http://www.ahk.com/t1_cable.html
> 
> That cisco link does not specify the cable itself, but only
> the pin 
> outs.  True T1 cable has a foil shield around each
> pair, also called 
> ABAM cable in the telco world.
> 
> Ethernet cable is twisted pair without any shielding
> between pairs.
> 
> And one shield around all the pairs is not the same as
> ABAM.
> 
> Lyle Giese
> LCR Computer Services, Inc.
> 
> On 12/08/11 10:53, Carlos Alvarez wrote:
> > A T1 cable according to this spec:
> >
> > http://www.cisco.com/en/US/products/hw/routers/ps214/products_tech_note09186a00801f5d89.shtml
> >
> > Crossing the 1/2 to 4/5 if needed.
> >
> >
> > On Thu, Dec 8, 2011 at 9:37 AM, Olivier  > >
> wrote:
> >
> >     2011/12/8, Carlos Alvarez
>  >     >:
> >      > I am not Kevin, but I'll tell
> you that I will not EVER use an
> >     Ethernet
> >      > cable for T1 again. 
> Kevin and I have discussed this at length,
> >     and the
> >      > "should work" plays out
> poorly in the real world, or at least
> >     mine.  I've
> >      > had it be fine, and had major
> problems.  I can't even find a
> >     pattern to it,
> >      > like length of cable.
> >      >
> >      > In a colo cabinet that was
> direct-connected to a carrier, it
> >     worked great
> >      > for years and then one
> day...no T1.  Just gone.  Go down there
> >     and put in a
> >      > real T1 cable, came right up,
> still up years later.
> >      >
> >      > I usually make my own,
> >
> >     which type of cable are you
> then using ?
> >
> >
> >      > since they are so expensive
> to buy.  I just connect
> >      > the four needed pins, pretty
> easy to do if you're not trying to
> >     stuff all
> >      > eight wires into the
> connector.
> >      >
> >      >
> >      >
> >      > On Thu, Dec 8, 2011 at 5:57
> AM, Tony Mountifield
> >      >
> wrote:
> >      >
> >      >> In article <4ee0b0e2.3050...@digium.com
> >     >,
> >      >> Kevin P. Fleming  >     >
> wrote:
> >      >> >
> >      >> > As I said before...
> an Ethernet cable will work nearly all the
> >     time, and
> >      >> > at a 5m length it's
> probably fine.
> >      >>
> >      >> Kevin, under what
> circumstances would an Ethernet cable
> >     potentially not
> >      >> work with T1/E1? And in
> those circumstances, what should be used
> >     instead?
> >      >> I'm wondering because I
> had never realised it was an issue until
> >     you said.
> >      >>
> >      >> Cheers
> >      >> Tony
> >      >> --
> >      >> Tony Mountifield
> >      >> Work: t...@softins.co.uk
> 
> -
> >     http://www.softins.co.uk
> >      >> Play: t...@mountifield.org
> 
> -
> >     http://tony.mountifield.org
> >      >>
> >      >> --
> >      >>
> > 
>    _
> >      >> -- Bandwidth and
> Colocation Provided by
> >     http://www.api-digital.com --
> >      >> New to Asterisk? Join us
> for a live introductory webinar every
> >     Thurs:
> >      >> http://www.asterisk.org/hello
> >      >>
> >      >> asterisk-users mailing
> list
> >      >> To UNSUBSCRIBE or update
> options visit:
> >      >> http://lists.digium.com/mailman/listinfo/asterisk-users
> >      >>
> >      >
> >      >
> >      >
> >      > --
> >      > Carlos Alvarez
> >      > TelEvolve
> >      > 602-889-3003
> 
> >      >
> >
> >     --
> > 
>    _
> >     -- Bandwidth and Colocation
> Provided by http://www.api-digital.com --
> >     New to Asterisk? Join us for a
> live introductory webinar every Thurs:
> >     http://www.asterisk.org/hello
> >
> >     asterisk-users mailing list
> >     To UNSUBSCRIBE or update
> options visit:
> >     http://lists.digium.com/mailman/listinfo/asterisk-users
> >
> >
> >
> >
> > --
> > Carlos Alvarez
> > TelEvolve
> > 602-889-3003
> >
> >
> >
> >
> > --
> >
> _
> > -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> > New to Asterisk? Join us for a live introductory
> webinar every Thurs:
> >             
>    http://www.asterisk.org/hello
> >
> > asterisk-users mailing list
> > To UNSUBSCRIBE or update options visit:
> >     http://lists.digium.com/mailman/listinfo/asterisk-users
> 
> 
> --
> _

Re: [asterisk-users] ISDN PRI configuration

[Lyle Giese]

Try this instead:

http://www.ahk.com/t1_cable.html

That cisco link does not specify the cable itself, but only the pin 
outs.  True T1 cable has a foil shield around each pair, also called 
ABAM cable in the telco world.


Ethernet cable is twisted pair without any shielding between pairs.

And one shield around all the pairs is not the same as ABAM.

Lyle Giese
LCR Computer Services, Inc.

On 12/08/11 10:53, Carlos Alvarez wrote:

A T1 cable according to this spec:

http://www.cisco.com/en/US/products/hw/routers/ps214/products_tech_note09186a00801f5d89.shtml

Crossing the 1/2 to 4/5 if needed.


On Thu, Dec 8, 2011 at 9:37 AM, Olivier mailto:oza_4...@yahoo.fr>> wrote:

2011/12/8, Carlos Alvarez mailto:car...@televolve.com>>:
 > I am not Kevin, but I'll tell you that I will not EVER use an
Ethernet
 > cable for T1 again.  Kevin and I have discussed this at length,
and the
 > "should work" plays out poorly in the real world, or at least
mine.  I've
 > had it be fine, and had major problems.  I can't even find a
pattern to it,
 > like length of cable.
 >
 > In a colo cabinet that was direct-connected to a carrier, it
worked great
 > for years and then one day...no T1.  Just gone.  Go down there
and put in a
 > real T1 cable, came right up, still up years later.
 >
 > I usually make my own,

which type of cable are you then using ?


 > since they are so expensive to buy.  I just connect
 > the four needed pins, pretty easy to do if you're not trying to
stuff all
 > eight wires into the connector.
 >
 >
 >
 > On Thu, Dec 8, 2011 at 5:57 AM, Tony Mountifield
mailto:t...@softins.co.uk>> wrote:
 >
 >> In article <4ee0b0e2.3050...@digium.com
>,
 >> Kevin P. Fleming mailto:kpflem...@digium.com>> wrote:
 >> >
 >> > As I said before... an Ethernet cable will work nearly all the
time, and
 >> > at a 5m length it's probably fine.
 >>
 >> Kevin, under what circumstances would an Ethernet cable
potentially not
 >> work with T1/E1? And in those circumstances, what should be used
instead?
 >> I'm wondering because I had never realised it was an issue until
you said.
 >>
 >> Cheers
 >> Tony
 >> --
 >> Tony Mountifield
 >> Work: t...@softins.co.uk  -
http://www.softins.co.uk
 >> Play: t...@mountifield.org  -
http://tony.mountifield.org
 >>
 >> --
 >>
_
 >> -- Bandwidth and Colocation Provided by
http://www.api-digital.com --
 >> New to Asterisk? Join us for a live introductory webinar every
Thurs:
 >> http://www.asterisk.org/hello
 >>
 >> asterisk-users mailing list
 >> To UNSUBSCRIBE or update options visit:
 >> http://lists.digium.com/mailman/listinfo/asterisk-users
 >>
 >
 >
 >
 > --
 > Carlos Alvarez
 > TelEvolve
 > 602-889-3003 
 >

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users




--
Carlos Alvarez
TelEvolve
602-889-3003




--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users



--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Carlos Alvarez]

On Thu, Dec 8, 2011 at 10:48 AM, giovanni.v  wrote:

>
> This is wrong, in both T568A or T568B ethernet pins 1/2 and 4/5 runs on a
> properly twisted pair. Also 120 Ohm impedance is matching the ISDN pri
> specification.
> If a straight pri cable is needed then a straight ethernet cable fits the
> job (not the same for a pri cross cable vs an eth cross cable).
>
>

It was probably the crossover I was thinking of, which is what I almost
always end up needing.  I stopped analyzing the situation when I found
myself simply replacing them with the right cable and being successful.



-- 
Carlos Alvarez
TelEvolve
602-889-3003
--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[giovanni.v]

Il 08/12/2011 18.17, Carlos Alvarez ha scritto:

  If you use an ethernet cable, you are using a pair of wires that is
not twisted together, removing the electrical advantage of twisted-pair
cable.


This is wrong, in both T568A or T568B ethernet pins 1/2 and 4/5 runs on 
a properly twisted pair. Also 120 Ohm impedance is matching the ISDN pri 
specification.
If a straight pri cable is needed then a straight ethernet cable fits 
the job (not the same for a pri cross cable vs an eth cross cable).


--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Carlos Alvarez]

On Thu, Dec 8, 2011 at 10:14 AM, Olivier  wrote:

> In fact I was rather referring to the previous example in which a
> cable did run OK for years and suddenly stopped to.
>

My THEORY is that the driver chips on either end were wearing out and no
longer able to send or receive as well as they once did.  When you run the
correct pairs, the wires are twisted together.  This is important for a
variety of electrical reasons, too lengthy to cover here, but a quick
google search will give you a lot of info if you care.  If you use an
ethernet cable, you are using a pair of wires that is not twisted together,
removing the electrical advantage of twisted-pair cable.


> Obviously, the connector pins were still correctly set.
> If it stopped to work, then it must come from the electric signals and
> should explained through cable impedance or things like that.
>

Yes, exactly.


-- 
Carlos Alvarez
TelEvolve
602-889-3003
--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Carlos Alvarez]

On Thu, Dec 8, 2011 at 9:37 AM, Olivier  wrote:

> >
> > I usually make my own,
>
> which type of cable are you then using ?
>

I just realized that I may have not answered the right question.  Did you
mean what raw cable did I use to make T1 cables?  Cat-3 or above is fine.
 I use whatever I have around, which is typically Cat-5e.  Yes, I know that
solid conductors aren't meant to be pushed into those connectors, yet my
experience is 100% good doing that.


-- 
Carlos Alvarez
TelEvolve
602-889-3003
--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Olivier]

2011/12/8, Carlos Alvarez :
> A T1 cable according to this spec:
>
> http://www.cisco.com/en/US/products/hw/routers/ps214/products_tech_note09186a00801f5d89.shtml
>
> Crossing the 1/2 to 4/5 if needed.

In fact I was rather referring to the previous example in which a
cable did run OK for years and suddenly stopped to.

Obviously, the connector pins were still correctly set.
If it stopped to work, then it must come from the electric signals and
should explained through cable impedance or things like that.

My question was rather how could the replacement cable itself be
precisely described  (thickness, shield, category, ...) ?

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Dan Austin]

Tony wrote:
>Kevin P. Fleming  wrote:
>> 
>> As I said before... an Ethernet cable will work nearly all the time, and 
>> at a 5m length it's probably fine.

> Kevin, under what circumstances would an Ethernet cable potentially not
> work with T1/E1? And in those circumstances, what should be used instead?
> I'm wondering because I had never realised it was an issue until you said.

I've never had an issue with using Cat5 cable, but I have run into telco/techs
that choose to use a pin out other than 1245, and of course defend it with
'That is our standard way to do it'.  So a standard Ethernet cable would fail,
but once one end was cut off an replaced with the required pin out it would
work fine (but no longer be an Ethernet cable, semantics but important).

Dan

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Carlos Alvarez]

A T1 cable according to this spec:

http://www.cisco.com/en/US/products/hw/routers/ps214/products_tech_note09186a00801f5d89.shtml

Crossing the 1/2 to 4/5 if needed.


On Thu, Dec 8, 2011 at 9:37 AM, Olivier  wrote:

> 2011/12/8, Carlos Alvarez :
> > I am not Kevin, but I'll tell you that I will not EVER use an Ethernet
> > cable for T1 again.  Kevin and I have discussed this at length, and the
> > "should work" plays out poorly in the real world, or at least mine.  I've
> > had it be fine, and had major problems.  I can't even find a pattern to
> it,
> > like length of cable.
> >
> > In a colo cabinet that was direct-connected to a carrier, it worked great
> > for years and then one day...no T1.  Just gone.  Go down there and put
> in a
> > real T1 cable, came right up, still up years later.
> >
> > I usually make my own,
>
> which type of cable are you then using ?
>
>
> > since they are so expensive to buy.  I just connect
> > the four needed pins, pretty easy to do if you're not trying to stuff all
> > eight wires into the connector.
> >
> >
> >
> > On Thu, Dec 8, 2011 at 5:57 AM, Tony Mountifield 
> wrote:
> >
> >> In article <4ee0b0e2.3050...@digium.com>,
> >> Kevin P. Fleming  wrote:
> >> >
> >> > As I said before... an Ethernet cable will work nearly all the time,
> and
> >> > at a 5m length it's probably fine.
> >>
> >> Kevin, under what circumstances would an Ethernet cable potentially not
> >> work with T1/E1? And in those circumstances, what should be used
> instead?
> >> I'm wondering because I had never realised it was an issue until you
> said.
> >>
> >> Cheers
> >> Tony
> >> --
> >> Tony Mountifield
> >> Work: t...@softins.co.uk - http://www.softins.co.uk
> >> Play: t...@mountifield.org - http://tony.mountifield.org
> >>
> >> --
> >> _
> >> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> >> New to Asterisk? Join us for a live introductory webinar every Thurs:
> >>   http://www.asterisk.org/hello
> >>
> >> asterisk-users mailing list
> >> To UNSUBSCRIBE or update options visit:
> >>   http://lists.digium.com/mailman/listinfo/asterisk-users
> >>
> >
> >
> >
> > --
> > Carlos Alvarez
> > TelEvolve
> > 602-889-3003
> >
>
> --
> _
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
>   http://www.asterisk.org/hello
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>



-- 
Carlos Alvarez
TelEvolve
602-889-3003
--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Olivier]

2011/12/8, Carlos Alvarez :
> I am not Kevin, but I'll tell you that I will not EVER use an Ethernet
> cable for T1 again.  Kevin and I have discussed this at length, and the
> "should work" plays out poorly in the real world, or at least mine.  I've
> had it be fine, and had major problems.  I can't even find a pattern to it,
> like length of cable.
>
> In a colo cabinet that was direct-connected to a carrier, it worked great
> for years and then one day...no T1.  Just gone.  Go down there and put in a
> real T1 cable, came right up, still up years later.
>
> I usually make my own,

which type of cable are you then using ?


> since they are so expensive to buy.  I just connect
> the four needed pins, pretty easy to do if you're not trying to stuff all
> eight wires into the connector.
>
>
>
> On Thu, Dec 8, 2011 at 5:57 AM, Tony Mountifield  wrote:
>
>> In article <4ee0b0e2.3050...@digium.com>,
>> Kevin P. Fleming  wrote:
>> >
>> > As I said before... an Ethernet cable will work nearly all the time, and
>> > at a 5m length it's probably fine.
>>
>> Kevin, under what circumstances would an Ethernet cable potentially not
>> work with T1/E1? And in those circumstances, what should be used instead?
>> I'm wondering because I had never realised it was an issue until you said.
>>
>> Cheers
>> Tony
>> --
>> Tony Mountifield
>> Work: t...@softins.co.uk - http://www.softins.co.uk
>> Play: t...@mountifield.org - http://tony.mountifield.org
>>
>> --
>> _
>> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>> New to Asterisk? Join us for a live introductory webinar every Thurs:
>>   http://www.asterisk.org/hello
>>
>> asterisk-users mailing list
>> To UNSUBSCRIBE or update options visit:
>>   http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>
>
>
> --
> Carlos Alvarez
> TelEvolve
> 602-889-3003
>

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Carlos Alvarez]

I am not Kevin, but I'll tell you that I will not EVER use an Ethernet
cable for T1 again.  Kevin and I have discussed this at length, and the
"should work" plays out poorly in the real world, or at least mine.  I've
had it be fine, and had major problems.  I can't even find a pattern to it,
like length of cable.

In a colo cabinet that was direct-connected to a carrier, it worked great
for years and then one day...no T1.  Just gone.  Go down there and put in a
real T1 cable, came right up, still up years later.

I usually make my own, since they are so expensive to buy.  I just connect
the four needed pins, pretty easy to do if you're not trying to stuff all
eight wires into the connector.



On Thu, Dec 8, 2011 at 5:57 AM, Tony Mountifield  wrote:

> In article <4ee0b0e2.3050...@digium.com>,
> Kevin P. Fleming  wrote:
> >
> > As I said before... an Ethernet cable will work nearly all the time, and
> > at a 5m length it's probably fine.
>
> Kevin, under what circumstances would an Ethernet cable potentially not
> work with T1/E1? And in those circumstances, what should be used instead?
> I'm wondering because I had never realised it was an issue until you said.
>
> Cheers
> Tony
> --
> Tony Mountifield
> Work: t...@softins.co.uk - http://www.softins.co.uk
> Play: t...@mountifield.org - http://tony.mountifield.org
>
> --
> _
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
>   http://www.asterisk.org/hello
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>



-- 
Carlos Alvarez
TelEvolve
602-889-3003
--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Tony Mountifield]

In article <4ee0b0e2.3050...@digium.com>,
Kevin P. Fleming  wrote:
> 
> As I said before... an Ethernet cable will work nearly all the time, and 
> at a 5m length it's probably fine.

Kevin, under what circumstances would an Ethernet cable potentially not
work with T1/E1? And in those circumstances, what should be used instead?
I'm wondering because I had never realised it was an issue until you said.

Cheers
Tony
-- 
Tony Mountifield
Work: t...@softins.co.uk - http://www.softins.co.uk
Play: t...@mountifield.org - http://tony.mountifield.org

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Kevin P. Fleming]

On 12/07/2011 05:06 PM, Vieri wrote:



--- On Wed, 12/7/11, Kevin P. Fleming  wrote:


Standard Ethernet cables do not always work for T-1/E-1
spans. They do work a rather large percentage of the time,
but not always. Distance between the NIU and the T-1/E-1
card can be a factor, among other things.

Many Digium products include span loopback devices, that
you can plug a cable into and generate a hard loopback
towards the card. If there is one of those on-site, have
someone unplug the cable from the NIU and plug it into the
loopback device instead; if the span goes green, then at
least your cabling/wiring are OK.


I bought several Digium products and for the site I'm managing now, there are 
at least these cards:
Wildcard TE120P single-span T1/E1/J1 card (rev 11)


A loopback connector should have been included with this card. It does 
not appear that our web store makes them (the T10i loopback connectors) 
available as individual items, although some distributors may sell them.



ISDN controller: Digium, Inc. Wildcard B410 quad-BRI card
and maybe more but right now I don't recall any "loopback device" although I 
won't be sure until I go to the site.
Can a loopback device be bought seperately?

What kind of cable should be used instead of an ethernet cable (I think they 
used a 5m long cat5 T-568B Straight-Through Ethernet Cable)?


As I said before... an Ethernet cable will work nearly all the time, and 
at a 5m length it's probably fine.


--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[giovanni.v]

Il 07/12/2011 23.45, Vieri ha scritto:

As far as I know, E1 usually use 16 as D channel. Anyway, I tried as you 
suggested and set 1 as the D channel and 2-31 as B channels.
In the asterisk log I got these messages:

chan_dahdi.c: Channel 16 is reserved for D-channel.
chan_dahdi.c: Unable to register channel '2-31'

So doesn't this actually tell me that I should keep using 16 as the D channel?


I your line is provisioned as NET5 (ETSI/EuroISDN) you should use 
channel 16 as D channel, no one else.


As suggested from Kevin check your cabling using a loopback, if you 
don't have one make it using an rj45 socket simply wiring pin 1 to pin 4 
ad pin 2 to pin 5.


Also check you telco network termination, a standard one provide TX on 
pins 4/5 and RX on pins 1/2 but sometimes this isn't true (e.g. E1 
gateways).


--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[giovanni.v]

Il 07/12/2011 23.45, Vieri ha scritto:

As far as I know, E1 usually use 16 as D channel. Anyway, I tried as you 
suggested and set 1 as the D channel and 2-31 as B channels.
In the asterisk log I got these messages:

chan_dahdi.c: Channel 16 is reserved for D-channel.
chan_dahdi.c: Unable to register channel '2-31'

So doesn't this actually tell me that I should keep using 16 as the D channel?


I your line is provisioned as NET5 (ETSI/EuroISDN) you should use 
channel 16 as D channel, no one else.


As suggested from Kevin check your cabling using a loopback, if you 
don't have one make it using an rj45 socket simply wiring pin 1 to pin 4 
ad pin 2 to pin 5.


Also check you telco network termination, a standard one provide TX on 
pins 4/5 and RX on pins 1/2 but sometimes this isn't true (e.g. E1 
gateways).


--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Andres]

and maybe more but right now I don't recall any "loopback device" although I 
won't be sure until I go to the site.
Can a loopback device be bought seperately?
   

Sure, we use the below device all the time:
http://www.amazon.com/Cables-Unlimited-TST-LOOP-003-Smartronix-Superlooper/dp/B000V6Y7IY

What kind of cable should be used instead of an ethernet cable (I think they 
used a 5m long cat5 T-568B Straight-Through Ethernet Cable)?

Thanks,

Vieri



--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users

   



--
Technical Support
http://www.telesip.net


--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Vieri]

--- On Wed, 12/7/11, Kevin P. Fleming  wrote:

> Standard Ethernet cables do not always work for T-1/E-1
> spans. They do work a rather large percentage of the time,
> but not always. Distance between the NIU and the T-1/E-1
> card can be a factor, among other things.
> 
> Many Digium products include span loopback devices, that
> you can plug a cable into and generate a hard loopback
> towards the card. If there is one of those on-site, have
> someone unplug the cable from the NIU and plug it into the
> loopback device instead; if the span goes green, then at
> least your cabling/wiring are OK.

I bought several Digium products and for the site I'm managing now, there are 
at least these cards:
Wildcard TE120P single-span T1/E1/J1 card (rev 11)
ISDN controller: Digium, Inc. Wildcard B410 quad-BRI card 
and maybe more but right now I don't recall any "loopback device" although I 
won't be sure until I go to the site.
Can a loopback device be bought seperately?

What kind of cable should be used instead of an ethernet cable (I think they 
used a 5m long cat5 T-568B Straight-Through Ethernet Cable)?

Thanks,

Vieri



--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Kevin P. Fleming]

On 12/07/2011 04:51 PM, Vieri wrote:



--- On Wed, 12/7/11, Kevin P. Fleming  wrote:


Vieri: You aren't even far enough along to worry about
D-channel assignments or anything like that. Your span is in
RED alarm; that means it can't see the far end at all. Until
you get that cured (layer 1 - physical layer) nothing above
it is going to work.

Since they mentioned HDB3 and CRC4, you most definitely
have an E1 span, and you will need to specify 'CCS' as well
because you are using ISDN signaling. If the line
coding/framing settings are wrong that *could* result in a
RED alarm, but doesn't always.

So, you need to start by getting the span to come out of
RED alarm (to go 'green'). This could be a cabling problem,
a hardware problem, or it could something as simple as the
fact that the telco hasn't actually 'turned up' the span
yet, because they don't usually do that until you have your
equipment plugged in and you call them to tell them that you
are ready for the span to be turned up.


They "should" have turned it up, or at least that's what one of the tech guys 
told me.
But I guess I'll have to check with them again.

The cable should be ok (standard ethernet cable) but I didn't actually install 
it myself (I'm in a remote location) so I'll have to check that too.


Standard Ethernet cables do not always work for T-1/E-1 spans. They do 
work a rather large percentage of the time, but not always. Distance 
between the NIU and the T-1/E-1 card can be a factor, among other things.


Many Digium products include span loopback devices, that you can plug a 
cable into and generate a hard loopback towards the card. If there is 
one of those on-site, have someone unplug the cable from the NIU and 
plug it into the loopback device instead; if the span goes green, then 
at least your cabling/wiring are OK.


--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Vieri]

--- On Wed, 12/7/11, Kevin P. Fleming  wrote:

> Vieri: You aren't even far enough along to worry about
> D-channel assignments or anything like that. Your span is in
> RED alarm; that means it can't see the far end at all. Until
> you get that cured (layer 1 - physical layer) nothing above
> it is going to work.
> 
> Since they mentioned HDB3 and CRC4, you most definitely
> have an E1 span, and you will need to specify 'CCS' as well
> because you are using ISDN signaling. If the line
> coding/framing settings are wrong that *could* result in a
> RED alarm, but doesn't always.
> 
> So, you need to start by getting the span to come out of
> RED alarm (to go 'green'). This could be a cabling problem,
> a hardware problem, or it could something as simple as the
> fact that the telco hasn't actually 'turned up' the span
> yet, because they don't usually do that until you have your
> equipment plugged in and you call them to tell them that you
> are ready for the span to be turned up.

They "should" have turned it up, or at least that's what one of the tech guys 
told me.
But I guess I'll have to check with them again.

The cable should be ok (standard ethernet cable) but I didn't actually install 
it myself (I'm in a remote location) so I'll have to check that too.

Big thanks for the explanation!

Vieri



--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Vieri]

--- On Wed, 12/7/11, Steve Edwards  wrote:

> > A telco has recently installed a new line in our
> building and I need to connect it to my Asterisk server with
> a Digium PRI card.
> > 
> > It's not the first time I set up and configure a PRI
> link but I'm failing to make this one work.
> > 
> > chan_dahdi.c: No D-channels available!  Using
> Primary channel 16 as D-channel anyway!
> 
> We usually get D channels on the first channel of the first
> T1 in an NFAS group and the last channel of the last t1.
> 
> However, telcos don't always get the order right. I've
> spent hours trying configurations and varying the D channel.
> Sometimes it's just that they number things in a different
> order than we were expecting. Sometimes, it almost appears
> that they use a dartboard :)

As far as I know, E1 usually use 16 as D channel. Anyway, I tried as you 
suggested and set 1 as the D channel and 2-31 as B channels.
In the asterisk log I got these messages:

chan_dahdi.c: Channel 16 is reserved for D-channel.
chan_dahdi.c: Unable to register channel '2-31'

So doesn't this actually tell me that I should keep using 16 as the D channel? 
(so chan_dahdi actually knows about it on its own, I guess)

It's funny though that chan_dahdi tells me I have to use channel 16 as D 
channel whenever I try to use another one, but when I do use 16, it says that 
there are no D channels available.

Confusing.

Thanks anyway for the reply.

Vieri


--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Kevin P. Fleming]

On 12/07/2011 04:15 PM, Steve Edwards wrote:

On Wed, 7 Dec 2011, Vieri wrote:


A telco has recently installed a new line in our building and I need
to connect it to my Asterisk server with a Digium PRI card.

It's not the first time I set up and configure a PRI link but I'm
failing to make this one work.

chan_dahdi.c: No D-channels available! Using Primary channel 16 as
D-channel anyway!


We usually get D channels on the first channel of the first T1 in an
NFAS group and the last channel of the last t1.

However, telcos don't always get the order right. I've spent hours
trying configurations and varying the D channel. Sometimes it's just
that they number things in a different order than we were expecting.
Sometimes, it almost appears that they use a dartboard :)


Vieri: You aren't even far enough along to worry about D-channel 
assignments or anything like that. Your span is in RED alarm; that means 
it can't see the far end at all. Until you get that cured (layer 1 - 
physical layer) nothing above it is going to work.


Since they mentioned HDB3 and CRC4, you most definitely have an E1 span, 
and you will need to specify 'CCS' as well because you are using ISDN 
signaling. If the line coding/framing settings are wrong that *could* 
result in a RED alarm, but doesn't always.


So, you need to start by getting the span to come out of RED alarm (to 
go 'green'). This could be a cabling problem, a hardware problem, or it 
could something as simple as the fact that the telco hasn't actually 
'turned up' the span yet, because they don't usually do that until you 
have your equipment plugged in and you call them to tell them that you 
are ready for the span to be turned up.


--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kflem...@digium.com | SIP: kpflem...@digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

Re: [asterisk-users] ISDN PRI configuration

[Steve Edwards]

On Wed, 7 Dec 2011, Vieri wrote:

A telco has recently installed a new line in our building and I need to 
connect it to my Asterisk server with a Digium PRI card.


It's not the first time I set up and configure a PRI link but I'm 
failing to make this one work.


chan_dahdi.c: No D-channels available!  Using Primary channel 16 as D-channel 
anyway!


We usually get D channels on the first channel of the first T1 in an NFAS 
group and the last channel of the last t1.


However, telcos don't always get the order right. I've spent hours trying 
configurations and varying the D channel. Sometimes it's just that they 
number things in a different order than we were expecting. Sometimes, it 
almost appears that they use a dartboard :)


--
Thanks in advance,
-
Steve Edwards   sedwa...@sedwards.com  Voice: +1-760-468-3867 PST
Newline  Fax: +1-760-731-3000

--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
  http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users

[asterisk-users] ISDN PRI configuration

[Vieri]

Hi,

A telco has recently installed a new line in our building and I need to connect 
it to my Asterisk server with a Digium PRI card.

It's not the first time I set up and configure a PRI link but I'm failing to 
make this one work.

The only information I got from the telco is:
"
Line Coding [HDB3] 
Framing [CRC4]
Encapsultation [hdlc 
Isdn switch-type primary-[net5]
"

Is "crc4" actually a "framing" parameter as stated by the telco, or is it just 
an "optional line coding parameter"?

I searched the web and not knowing exactly which parameters to use, I tried the 
following zaptel/dahdi config:

# TE120P (PRI):
span=1,1,0,ccs,hdb3,crc4
# as E1
bchan=1-15
dchan=16
bchan=17-31

switchtype = euroisdn
signalling = pri_cpe

However, the link doesn't work and I get this:

*CLI show status:
Description  Alarms IRQbpviol CRC4
Wildcard TE120P Card 0   RED1  0  0

# cat /proc/zaptel/1
Span 1: WCT1/0 "Wildcard TE120P Card 0" (MASTER) HDB3/CCS/CRC4 RED
IRQ misses: 1

   1 WCT1/0/1 Clear (In use) RED
   2 WCT1/0/2 Clear (In use) RED
   3 WCT1/0/3 Clear (In use) RED
   4 WCT1/0/4 Clear (In use) RED
   5 WCT1/0/5 Clear (In use) RED
   6 WCT1/0/6 Clear (In use) RED
   7 WCT1/0/7 Clear (In use) RED
   8 WCT1/0/8 Clear (In use) RED
   9 WCT1/0/9 Clear (In use) RED
  10 WCT1/0/10 Clear (In use) RED
  11 WCT1/0/11 Clear (In use) RED
  12 WCT1/0/12 Clear (In use) RED
  13 WCT1/0/13 Clear (In use) RED
  14 WCT1/0/14 Clear (In use) RED
  15 WCT1/0/15 Clear (In use) RED
  16 WCT1/0/16 HDLCFCS (In use) RED
  17 WCT1/0/17 Clear (In use) RED
  18 WCT1/0/18 Clear (In use) RED
  19 WCT1/0/19 Clear (In use) RED
  20 WCT1/0/20 Clear (In use) RED
  21 WCT1/0/21 Clear (In use) RED
  22 WCT1/0/22 Clear (In use) RED
  23 WCT1/0/23 Clear (In use) RED
  24 WCT1/0/24 Clear (In use) RED
  25 WCT1/0/25 Clear (In use) RED
  26 WCT1/0/26 Clear (In use) RED
  27 WCT1/0/27 Clear (In use) RED
  28 WCT1/0/28 Clear (In use) RED
  29 WCT1/0/29 Clear (In use) RED
  30 WCT1/0/30 Clear (In use) RED
  31 WCT1/0/31 Clear (In use) RED

Placing a call through the Zap/Dahdi trunk in Asterisk doesn't work and I get 
the following message in the log:

chan_dahdi.c: No D-channels available!  Using Primary channel 16 as D-channel 
anyway!
logger.c: -- Attempting call on Zap/g1/999xx for 
999xx@custom-TESTCALL:1 (Retry 1)
channel.c: Unable to request channel Zap/g1/999xx
pbx_spool.c: Call failed to go through, reason (8) Congestion (circuits busy)
chan_dahdi.c: No D-channels available!  Using Primary channel 16 as D-channel 
anyway!

Am I missing some information here?
I'm *supposing* it should be E1 (and that I can use 16 as dchan), euroisdn (not 
"national"), but my telco states "hdlc Isdn switch-type primary-[net5]" and I 
don't know how to translate it to zaptel/dahdi...

Also, my telco hasn't mentioned anything about ccs but I tried it anyway 
because I wouldn't know what else to use.

I also tried 
signalling = pri_net
but still got the same RED alerts.

Any suggestions?

Thanks

Vieri



--
_
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
   http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users