asterisk users - Aug 2004 - number of simultaneous calls with E&M

Hullo over there. i'm trying to link an asterisk box
with a legacy PBX system with a four wire trunk line.
the legacy PBX has 21 analog phones connected to it
and i would like to route calls to another site via
the asterisk box. i would like to use E&M signaling
over this line. my question is how many simultaneous
calls can you have over this line with E&M signaling.
is there a better way of doing this apart from  using T1?


		
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I've done this with a Fujitsu 9600.  With T-1 interface cards on both 
the legacy PBX and Asterisk you'll get 24 voice channels.  If the legacy 
PBX is capable you can configure the circuit as E-1 and get 32 channels.

Mine works well.  With E&M you won't get the caller's name but you
will
get caller's number (CID).

Mike

muhumuza brian wrote:
> Hullo over there. i'm trying to link an asterisk box
> with a legacy PBX system with a four wire trunk line.
> the legacy PBX has 21 analog phones connected to it
> and i would like to route calls to another site via
> the asterisk box. i would like to use E&M signaling
> over this line. my question is how many simultaneous
> calls can you have over this line with E&M signaling.
> is there a better way of doing this apart from  using T1?
> 
> 
> 		
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-- 
Michael Welter
Introspect Telephony Corp.
Denver, Colorado
+1 303 674 2575
mike@introspect.com
www.introspect.com

I'm not certain I understand your question, however: If you have one four
wire E&M trunk interface then you can only handle one call over it at a
time. E&M is a handshaking protocol, not a multiplexing protocol (such as
the protocols used by T1 circuits, which give 24 channels on one pair).

Hope that helps.

Kris Boutilier
Information Systems Coordinator
Sunshine Coast Regional District

-----Original Message-----
From: muhumuza brian [mailto:m_brian2001@yahoo.com]
Sent: August 30, 2004 1:56 PM
To: asterisk-users@lists.digium.com
Subject: [Asterisk-Users] number of simultaneous calls with E&M


Hullo over there. i'm trying to link an asterisk box
with a legacy PBX system with a four wire trunk line.
the legacy PBX has 21 analog phones connected to it
and i would like to route calls to another site via
the asterisk box. i would like to use E&M signaling
over this line. my question is how many simultaneous
calls can you have over this line with E&M signaling.
is there a better way of doing this apart from  using T1?