asterisk users - Apr 2004 - Strange T1 Problem - FIXED plus new question

Sadly it's a limited to PRIs(at least that's what I've been told)
You just
can't send that much call data with a good old non-PRI T1. The up side is
you get one extra voice channel to use as compared to a PRI. It's strange
that the carrier doesn't have PRI cabability, I've run into many more
carriers that can't do non-PRI. I've even had one that couldn't send
me
ANI(CallerID) on non-PRI lines.

Once you get into the world of ISDN and PRI, you start to be able to do a
lot more with the signaling of calls, and you even have the ability to do
faster call switching as compared to a non-PRI.

My advice is to get a different carrier, there are hundreds out there. And
if you absolutely have to have dynamic CallerID transmission you should
verify that your new carrier will let you do that before you sign a
contract(Make sure you verify it by talking to an actual switch tech from
the carrier, sales people will lie through their teeth to get you to sign
that contract).

Hope this helps,

MATT---


-----Original Message-----
From: Mike Machado [mailto:mike@homelandtel.com]
Sent: Friday, April 16, 2004 11:30 AM
To: asterisk-users@lists.digium.com
Subject: Re: [Asterisk-Users] Strange T1 Problem - FIXED plus new
question


> >
> You can usually get CLI on an E&M robbed bit T1 by configuring it
right.
> Instead of just sending you the DNIS as a string of DTMF they usually 
> send *<cli>*<dnis>*. The DNIS and CLI may be swapped, and there
may be
> less than 3 *s in the string - wonderful consistency, eh? :-\
I am getting CallerID and DNIS on the inbound calls. What I really need
is to be able to set callerID on outbound calls. I am trying to set the
callerid using SetCIDNum just before using Dial on a zap channel, but it
looks like the switch guys have it set to always stamp the same callerID
on the my outbound calls no matter what I put in SetCIDNum or what
channel on the T1 I use. Is this a misconfiguration of the switch or a
limitation of the signaling protocol? If its the switch, can you give me
any pointers as to what I could ask them to look for, or if its the
protocol, do you know any other signaling protocol that lets me set
outbound callerID (besides PRI)?

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On Fri, 2004-04-16 at 08:45, mattf wrote:
> Sadly it's a limited to PRIs(at least that's what I've been
told) You just
> can't send that much call data with a good old non-PRI T1. The up side
is
> you get one extra voice channel to use as compared to a PRI. It's
strange
> that the carrier doesn't have PRI cabability, I've run into many
more
> carriers that can't do non-PRI. I've even had one that couldn't
send me
> ANI(CallerID) on non-PRI lines.
> 
> Once you get into the world of ISDN and PRI, you start to be able to do a
> lot more with the signaling of calls, and you even have the ability to do
> faster call switching as compared to a non-PRI.
> 
> My advice is to get a different carrier, there are hundreds out there. And
> if you absolutely have to have dynamic CallerID transmission you should
> verify that your new carrier will let you do that before you sign a
> contract(Make sure you verify it by talking to an actual switch tech from
> the carrier, sales people will lie through their teeth to get you to sign
> that contract).
> 
> Hope this helps,
> 
> MATT---
> 

My situation is a little different. The carrier switch is about 100 feet
away from my asterisk box. The company I am working for is a CLEC and
they have their own switch. The switch I am connected to does not have a
very expensive PRI signaling card ($35k), so they can only do CAS.

If I was a customer and getting service from a carrier, I would
definitely have gotten a PRI. Thanks for your perspective on this.

Matt advised:
> And
> if you absolutely have to have dynamic CallerID transmission you should
> verify that your new carrier will let you do that before you sign a
> contract(Make sure you verify it by talking to an actual switch tech from
> the carrier, sales people will lie through their teeth to get you to sign
> that contract).
Good advice and here's more...

Once you have the actual switch tech to confirm you can run dynamic CallerID
(and specify if the CallerIDs you will be specifying are within the DIDs
allocated to your PRI or not), then get it in writing. Best is if they will
email you confirmation. Failing that, send them email saying "Further to
our
telephone conversation of xxyyzz, this is to confirm that with the PRI we
will be ordering from aabbcc company we will be able to dynamically specify
the CLID on outbound calls and the CLID may or may not be one of our DIDs."