I am assuming that you are probably referring to an E1 PRI interface?
Probably G.703?
Also, I want to add that if you are dealing with an E1 PRI G.703, unbalance
wiring has two Coaxial physical cables while the balanced G.703 uses a
RJ-48C connector. Also, realize that many international countries DO NOT
provide a DSU NTU on E1 interface. So you will need a router that supports
in internal DSU or get an external CSU/DSU.
Thanks,
Evan You
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
ciscolab
Sent: Sunday, November 19, 2000 12:53 PM
To: willy george; [EMAIL PROTECTED]
Subject: Re: ISDN PRI MODULE
Hi Willy!
Balanced and Unbalanced is a term carried over from transmission line
theory...ie., any form of energy transfer between two points.
(It overs data, microwave, telephone circuits, radio antenna, as well as
high-voltage power distribution!)
A balanced line uses two channels (ie., conductors) for energy transmission.
What happens is that the voltage of the two conductors are equal in
strength, but opposite in direction (ie., positive and negative voltages)
with respect to ground, in this way any induced voltages (ie., interference)
are minimised => you can run this type of cable over longer distances
without corrupting the original voltage
(ie., data).
Example: G.703 interface, twin-ax cable, Cat-5 cable, RS-442, POTS copper
line (ie., TIP and RING) etc.,
Advantage: Longer distance runs with less corruption on the channel
Disadvantage: More complicated end interfaces and tends to require closer
tolerances for the cable => more expensive!
An un-balanced line is one in which the voltages are not equal, with respect
to ground.
Example: X.21 interface, RS-232, TV/Radio coax cable etc.,
Advantage: Cheaper cable, line drivers (ie., interfaces) are cheaper as well
Disadvantage: Not suitable for long distance runs
I hope that helps...on the balanced and un'balanced front!
Regards,
Serge :)
----- Original Message -----
From: willy george <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, November 19, 2000 2:35 PM
Subject: ISDN PRI MODULE
> Dear All,
> I have noticed that when you order an ISDN PRI module for a modular router
there are two choices available. Balanced and Unbalanced. Could any one
please tell me what the difference is between the two and what is the
advantage of using either one of them?.
> I have also noticed a line "Processmaxtime=200" in the configs of some
routers. What exactly does this particular line signify?
> Thanks in advance for your time
> Willy
>
> _____________________________________________________
> Chat with your friends as soon as they come online. Get Rediff Bol at
> http://bol.rediff.com
>
> Participate in crazy auctions at http://auctions.rediff.com/auctions/
>
>
>
> _________________________________
> FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_________________________________
FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
_________________________________
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
