All,
In the design of an Asterisk system using Cisco 7900 series SIP phones
we are struggling with giving the reception folks (3) hardware that can
tell them the status of everyone in the office (10 or so) (On the phone,
out of office etc) Something that would register each of the extensions
we choose and give status of that ext.
What hardware (Phone or other) could we give the receptionist to do
this?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jerry
Jones
Sent: Monday, July 02, 2007 4:53 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] Learn some terminalogy before mounting
thistask.
On Jul 2, 2007, at 4:31 PM, James R. Stevens wrote:
All,
It's been some time since this thread was alive but we are now seeing
some progress in this project. Which I will document.
We have ordered a T1 for the new building which we are moving (We are
getting 14 channels of the T1.) and have a Sangoma A101 card for a 3U
rack server.
The T1 will have B8ZF decoding and ESF framing which the sangoma card
should handle.
They asked me if we want NI1 or NI2 ?? Is this a reference to the
PRI ?
Yes. You want NI2.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Pierre
Marceau
Sent: Tuesday, April 10, 2007 11:25 PM
To: asterisk-users@lists.digium.com
Subject: Re: [asterisk-users] Learn some terminalogy before mounting
this task.
James,
I'm sorry that I can't add anything but just wanted you to know that I
am watching this thread with great interest and suspect that many
others
will too.
Thanks in advance for posting lots of details as you go thru the
process.
Pierre
[EMAIL PROTECTED] 4/10/2007 10:41:36 PM
Hi James,
Admittedly, the terminological and conceptual barrier may present
some
impediments to the completeness and specificity of answers, so we
might
have to work at this a bit, but let's see how we can help:
On Tue, 10 Apr 2007, James R. Stevens said something to this effect:
We have a T1 coming into the building(FYI-Our Voice and Data are on
separate T's) terminating at the Smart Jack.
Are you implying that there are two T1 circuits -- one voice,
and one
data? Or do you mean that the T1 is channelised and some of the
channels
are used for voice and some for data? That's kind of what it sounds
like.
Sounds like you can do 7 calls on voice channels and the rest are
provisioned as a clear-channel data pipe.
That would mean that you have some equipment for breaking them
out on
your premises. The channel bank would break out the voice lines as
FXO
analogue lines (if you set it to) and those probably feed into your
PBX.
The rest of the channels used for data would probably be signaled
out on
another T1 interface, but with some subrate DS0 channels missing.
That's
ust a guess.
But what you say below suggests that my theory is wrong, so perhaps
it is
the case that you have separate voice and data T1s after all, even
though
you refer to it in the singular.
Do be aware that under no circumstances does anyone generally refer
to a
T1 as a T. :)
I can tell you our current phone system can handle 7 phone calls at a
time:
Does this mean the T only has 7 channels provisioned out of the 24
possible?
This is possible. Do you happen to know what kind of signaling is
used
on it? Is it an ISDN PRI, or an EM trunk?
Does a channel (In terms of the T1) = a port?
A port on what? The channel bank?
Channel banks generally do break the DS0s (subrate 64 kbps
channels,
of
which there are 24 on a T1) out, but some more sophisticated ones have
the
capability to do other things as well.
If so, the answer is yes.
How many phone calls can one TDM400 support concurrently? (four ??)
If it has four FXO ports and four FXO modules, yes. They come in
different combinations. Some come with 2 FXO (outside POTS lines
to CO)
and 2 FXS (plain analogue POTS handsets) ports, etc.
Would I be better off getting a Zapata T1 card and forgetting the
Channel bank all together(Use the digital signal)?
You could do that. Personally, the easiest approach I would say
would be
to order a PRI. They've probably considerably gone down in prices,
too,
especially if you go shopping with some friendly CLECs. The rule of
thumb
in the industry is that generally, once you pass the threshold of
six or
seven POTS lines, it becomes economical to just order an entire
PRI, and
once you do that, there usually aren't *very* considerable savings
to be
gained from turning down all but a few channels. A PRI has 23
channels
(bearer channels (B channels)) and one signaling channel (D
channel);
it's a type of T1-based ISDN interface.
So, you might potentially be able to get 23 in/outbound phone lines
for
roughly the same cost or a modest
