<html><div style='background-color:'><P>Hi,</P> <P>I am having some problem in defining CAS SF Inband signalling on a Digium E100P card. The problem is that the syntax given in the sample zaptel.conf doesn't work. Can someone provide me with an example of the syntax.</P> <P>I am trying to connnect asterisk with another exchange using a E1 CAS. I guess SF is the only option as the rest fxo,fxs,e&m etc are all subscriber end signalling. i need a CO to CO (or PBX to PBX) signalling...Somebody guide me on that too.</P> <P>Any help will be highly appreciated.</P> <P>Thnaks </P> <P>Sincerly,</P> <P>Janjua<BR><BR><BR></P> <DIV> </DIV></div><br clear=all><hr>The new <a href="http://g.msn.com/8HMAEN/2737??PS=">MSN 8:</a> smart spam protection and 2 months FREE* </html>
Alfred R. Nurnberger
2004-Jan-21 09:09 UTC
[Asterisk-Users] CAS SF Inband tone signalling problem
E&M is the traditional protocol to connect two COs or PBXs together. E&M trunks are inherently symmetrical. So there is no subscriber or CO side. You have to see about the higher level signalling protocol to make sure dialed digits etc work right. Regards. Alfred R. Nurnberger ---------------------------------------------------------------------------- ---- F L O S Y S Making Communications Flow Tel: +1 (503) 972-9300 Fax: +1 (503) 972-9309 US Toll Free: 1-877-4FLOSYS http://www.flosys.com -----Original Message----- From: asterisk-users-admin@lists.digium.com [mailto:asterisk-users-admin@lists.digium.com]On Behalf Of M.A. Ali Sent: Tuesday, January 20, 2004 11:06 PM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] CAS SF Inband tone signalling problem Hi, I am having some problem in defining CAS SF Inband signalling on a Digium E100P card. The problem is that the syntax given in the sample zaptel.conf doesn't work. Can someone provide me with an example of the syntax. I am trying to connnect asterisk with another exchange using a E1 CAS. I guess SF is the only option as the rest fxo,fxs,e&m etc are all subscriber end signalling. i need a CO to CO (or PBX to PBX) signalling...Somebody guide me on that too. Any help will be highly appreciated. Thnaks Sincerly, Janjua ---------------------------------------------------------------------------- ---- The new MSN 8: smart spam protection and 2 months FREE* _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20040121/e52ea673/attachment.htm
Samuel Jimenez
2004-Jan-21 12:31 UTC
[Asterisk-Users] CAS SF Inband tone signalling problem
Channel Associated Signaling is a simple 4 bits 'protocol' often used in
digital non-isdn E1 connections to define/indicate the state of the line (or
channel): sieze, sieze ack, idle, etc, at a given moment. Usualy, only 2 of
those 4 bits are used.
However, given that CAS tables may vary from manufacturer to manufacturer, the
most important thing to start with in a PBX-to-PBX CAS connection is to identify
the CAS table being used at the far-end switch.
If you can not easily obtain the tables on the far-end --which is the
usually the case when the brand of your switch is not the same as the one at the
far end, or if you don't have previous experience with CAS, you may get
stuck even if you have a CAS analyzer.
Given that in PBX-to-PBX scenarios you usually go with E&M signaling, you
will also have to deal with the start arrangement; usually WiNK or IMMediate
You have to have the same start arrangemnet for each direction (REC/XMT) as the
far end switch. If Wink Start, you also have to deal with the length of the
wink pulse.
If you have the far end CAS table, just program yours to match their values.
I am new with Asterisk and have never used zaptel.conf, but if u attach the
far end CAS table to your post, we can be more precise in helping.
Rgds
Sam\\\
----- Original Message -----
From: M.A. Ali
To: asterisk-users@lists.digium.com
Sent: Wednesday, January 21, 2004 1:05 AM
Subject: [Asterisk-Users] CAS SF Inband tone signalling problem
Hi,
I am having some problem in defining CAS SF Inband signalling on a Digium
E100P card. The problem is that the syntax given in the sample zaptel.conf
doesn't work. Can someone provide me with an example of the syntax.
I am trying to connnect asterisk with another exchange using a E1 CAS. I
guess SF is the only option as the rest fxo,fxs,e&m etc are all subscriber
end signalling. i need a CO to CO (or PBX to PBX) signalling...Somebody guide me
on that too.
Any help will be highly appreciated.
Thnaks
Sincerly,
Janjua
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