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

[W. Kevin Hunt]

Caller-ID can be sent over Channelized T1's, as well as a few of the
other class-features (stutter dial tone, etc...)
Setting outbound ANI is something that can't be done on Channelized T1's
which may be what you were referring to.  
The csu's you reference are usually called Drop and Insert CSU's...  An
Adtran 850T can be a drop and insert unit, and do the de-channelization
to FXO's.  It has a DSX port on it (and a v.35 port on it) for the
remaining channels to pass through the unit and go to a router...  You
can get a D&I CSU on ebay for around $ 500, and an 850T w/ a few 4 port
FXO's for arounf $ 1000 - $ 1200

W. Kevin Hunt

CCIE #11841
MCSE, Linux+ SME
www.huntbrothers.com
 
-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Lyle Giese
Sent: Sunday, July 11, 2004 9:12 AM
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] Three (quick?) questions...

Paul is right.  For voice, there are two varities of T1's.  The straight
channelized T1 provides 24 pots lines and no custom services, like
caller ID.  The other is a PRI ISDN, which is 23 voice and 1 'D'
channel.  The telco can now provide more services, including caller id
over the D channel, backup routing of voice calls when the T1 goes down,
and outbound caller id of the extension placing the call for E911
translation.

Traditionally splitting a T1 for voice and data used a special CSU/DSU
that you can program to provide two T1 streams and divided the channels
between the PBX and the router.  It's very easy to configure a CSU/DSU
for this.
The voice stream is usually a T1 data stream that connects to the PBX
with the data piece sent via v.35 serial to the data router.  Most of
the installs I have seen were ISDN type voice, so chan 24 was always
reserved for the D chan signalling.

I think these CSU/DSU's run between $2,000 & $3,000 new(I have not
priced them for a while), but are quite easy to configure and install.

I am new to this forum, but worked for 23 years for the telco here doing
the central office piece of this puzzle and then for 5 years doing new
office turnups for a wireless telco where we put in many split T1's
using Adtran CSU/DSU's to split the data stream.

Lyle