[Asterisk-Users] Three (quick?) questions...

[Paul Mahler]

Hi,

T1 is the carrier. T1 provides 24 "D" channels of 64Kbps each. 

Telephone companies provide ISDN (integrated services data network) on top
of T-carrier. Two common flavors are BRI (basic rate interface) and PRI
(Primary rate interface.) BRI provides two 64 kps channels, PRI provides 23
usable channels, the 24th is used for signalling. 

So--you can get phone calls over a T1 or over a T1 that is provisioned as a
PRI. You can get 24 calls on a T1 and 23 on a PRI. 

A T1 has 24 channels. You can split, that is partialize, the channels
between data and voice. You can do this with hardware outside the * server.
Higher end Cisco routers, for example, support this. 

You can also use * and linux to partialize the T1. You better plan on
spending a lot of time on making it work if you do it this way. You have to
install the Linux packages to split the line. NON trival. Works great,
though. Much less expensive, too. 

Paul


Paul Mahler 
pmahler at signate.com 	
Signate, LLC
665 Third Street
Suite 100
San Francisco, CA
 94107-1901

 Asterisk Services and Training

 

 

 

 

> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com 
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> Ken D'Ambrosio
> Sent: Saturday, July 10, 2004 8:33 AM
> To: asterisk-users at lists.digium.com
> Cc: kend at xanoptix.com
> Subject: [Asterisk-Users] Three (quick?) questions...
> 
> [Please excuse if this is a repeat; I initially tried to send 
> it from a different account, and it's been held up for a 
> couple of days awaiting moderation.]
> 
> 1) What's the absolute minimum required (hardware-wise) in 
> order to get one
>    in-bound POTS line into Asterisk, and then have IP phones "inside?"
>    [In other words, I obviously need a NIC -- but what would be the
>    bare-bones telco POTS interface?]
> 
> 2) What phones would be recommended for inexpensive (doesn't 
> even need LCD),
>    and yet functional?
> 
> 3) In order to share data and voice over a T1, does it have to be PRI?
>    [I've got a T1 I could probably play with, but I'd like to be sure
>    it'll... well, you know: work.]
> 
> Thanks,
> 
> Ken D'Ambrosio
> Sr. SysAdmin,
> Xanoptix, Inc.
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