[asterisk-users] Learn some terminalogy before mountingthistask.

James Collier james.collier at xtratelecom.es
Mon Aug 6 09:57:45 CDT 2007


Flash Operator Panel would do it.

Also the Aastra 55i phones with the expansion module, which has 36 lines on
it should work, but you will need to cofigure your Asterisk for Shared Line
Appearances (also called Bridged Line Appearance) for the Busy Lamp Field
(BLF) to work.  The Aastra 55i would show you if they are talking or not.




-----Mensaje original-----
De: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com]En nombre de James R.
Stevens
Enviado el: lunes, 06 de agosto de 2007 5:39
Para: Asterisk Users Mailing List - Non-Commercial Discussion
Asunto: Re: [asterisk-users] Learn some terminalogy before
mountingthistask.


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: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] 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: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Pierre
> Marceau
> Sent: Tuesday, April 10, 2007 11:25 PM
> To: asterisk-users at 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
>
>
>>>> abalashov at evaristesys.com 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 E&M 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 increase, which would increase your
> organisation's capacity to do things like conference calling and other
> things which tie up large amounts of outside lines.
>
>    Do beware that if you go this route, PRIs can be ordered as
> "inward-only"
> (typically used for modem and termination-only telephony applications
> like
> voicemail, IVR, conferencing, etc.) or bidirectionally.
>
>> If we go with a Zapata T1 card for the Asterisk server would we be
> able
>> to provision an analog phone line, for say a FAX machine from it?
>
>    No, not if the card doesn't have FXS ports on it.  But you could  
> get
> another Digium or Digiumlike card that does, even if it's just a
> single-port (like the hugely popular X100P, which is very inexpensive)
> and pull that off.
>
>    Let me know what else we can answer, or if I substantially
> misunderstood
> your question.
>
> Good luck,
>
> -- Alex
>
> --
> Alex Balashov <sasha at presidium.org>
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