Avoid this type of project like the plague. If you touch their system
for any reason, you will own it from that point forward, and any
"problems" they subsequently have will be your fault, and you will be
expected to fix at no charge since "it was working fine before you made
your changes". I have seen this happen too many times to count.
A few things to bear in mind:
1. There are both CLID and non-CLID versions of the line cards for
Norstar. If they have non-CI cards, you're not going to get caller ID
into that system without purchasing new cards.
2. There is no guarantee the lines from Bell are delivering Caller ID.
3. CLID is delivered between the first and second ring. If the auto
attendant on that system is programmed to answer calls immediately, the
CLID will never be delivered. Many customers do not want to add two
extra rings just to get caller ID.
4. Hairpinning. On a small system, each externally-forwarded call uses
two trunks; one in and one out. On a small system this can eat up trunks
so fast they'll run out of circuits.
5. Attenuation on analogue trunks. An analogue circuit can be expected
to have between -3dB and -8dB of loss. This means that for every
forwarded call there could be as much as -16dB of loss.
Don't mess with old phone systems. I worked with Norstars for years, and
even though I know them better than most, I won't touch them. A cheap
customer, coupled with a system that's very kludgy and inflexible,
pretty much guarantees plenty of grief, but not much income.
If you want to give your friend some advice, tell them not to experiment
with the system unless they are prepared to spend many sleepless nights
reading Norstar manuals, and many stressful days as their boss yells at
them for messing with the phone system..
Either that or upgrade to Asterisk (which, admittedly, will cost a bit
more than a few hundred dollars).
I will say no more.
Jim
On 2/28/2010 10:35 PM, Bruce N wrote:
Hi Guys,
A friend of mine is asking me how to enable Caller ID display and Call Forward
feature. I don't know much about the system except for have a paper with some
info about it's firmware. This was probably installed in 80s or 90s and since
then no one noticed that they don't receive caller id :-) They have recently
figured out that if they see the caller ID on incoming calls it can be useful.
They also think that call forward can be a useful feature but they don't know
how to forward their extensions to their cell phones.
The company is looking to spend less than a couple hundred to get these two
features working and so I don't bother to drop on site but I will give my
friend some tips if you guys know anything about these systems. I am assuming
the FEATURE 4 for forward doesn't work or else someone would have figured this
out in the last 15 years. Or maybe that is for internal transfers...
One other assumption I am making is that they use a PRI with this since their
number always show the same when they call out. I know this for sure in couple
of days. If it is PRI then I guess Caller ID receiving has always been a
standard feature.
They are thinking they need a module to get these features working. Is that
true?
Info I have:
Flash CardFlash NT5B78EB Rev012000/10/03
EF FLASH VM 2.0.10Flash Module NNTM040CR51T1999/9/19NT5B06EA-93
Norstar Plus Modular ICSNNTM845504EV 2000/01/28NT7B53FA-93 0051 Rev 09
A7310 Handset
ThanksBruce
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Jim Van Meggelen
[email protected]
http://www.oreillynet.com/pub/au/2177
"A child is the ultimate startup, and I have three.
This makes me rich."
Guy Kawasaki
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