03-16-2007 04:12 PM - edited 03-03-2019 04:11 PM
Good Day!
We have a client PABX that needs to connect to 3662 voice gateway via T1 CAS
here's the connection details:
T1 CAS Specs:B8ZS /ESF/CAS/DTMF
Call Manager 4.01
3662 config:
controller T1 1/0
framing esf
linecode b8zs
pri-group timeslots 1-24
controller T1 5/1
framing esf
linecode b8zs
ds0-group 0 timeslots 1-24 type e&m-wink-start
dial-peer voice 22 pots
destination-pattern 1715
port 5/1:0
Client PABX is ready to recieve 4 digits extension but i cant get it to work.
Logs on my gateway:
Telephony call-legs: 1
SIP call-legs: 0
H323 call-legs: 1
Total call-legs: 2
381E : 16681440hs.1 +-1 pid:1 Answer 2228 connected
dur 00:00:00 tx:11/1760 rx:0/0
IP 10.21.0.254:21422 rtt:0ms pl:0/0ms lost:0/0/0 delay:0/0/0ms g711ulaw
381E : 16681440hs.2 +-1 pid:23 Originate 1715 connecting
dur 00:00:00 tx:0/0 rx:23/3680
Tele 5/0:2 (1631): tx:470/47/0ms g711ulaw noise:0 acom:0 i/0:-76/-79 dBm
03-17-2007 03:45 AM
Diagram:
IPT----VG3662(E&M)----T1CAS(TELCO)----PABX(E&M)
03-17-2007 04:01 AM
By T1CAS(TELCO) do you mean there is a T1 circuit provided by telco?
Have you checked that E&M is on both router and PBX? If your PBX could support PRI, that would things easier.
What is the state of the line ("show controller")?
Please enable debug "debug vpm signal".
03-17-2007 04:55 AM
By T1CAS(TELCO) do you mean there is a T1 circuit provided by telco?
Yes, P2P T1 provided by telco
Have you checked that E&M is on both router and PBX? If your PBX could support PRI, that would things easier.
Yes Both is configured as E&M wink start dnis dtmf, I do agree that it would be easier to troubleshoot if we use PRI but the client preferred to use CAS.
What is the state of the line ("show controller")?
T1 is UP( i'l post the state later)
Please enable debug "debug vpm signal".
How would i know the problem?
When i try to dial the 4 digits extension from IP Phone, i got 8 secs delay then fast busy.
We also tried to pull the T1 and connect to sunset t10 tester, dial the 4 digits extension and it is completing and we got our call answered.
based on the setup is it going to work?
VG3662--T1CAS--PABX ???or we need to have a VG3662--T1CAS--VG---PABX ???
Thanks!
03-17-2007 05:33 AM
Hi,
When you enable "term mon" and "debug vpm signal" you will see what the router is doing with the voice signaling, dtmf etc.
There is no need that you place another voice gateway on the other side of the T1, but it would be useful if you could place there circuit analyzer there for diagnostic purposes.
03-17-2007 06:57 AM
Thanks!
Any link or documentation you can recommend?
I have tried all the config from E&M to FXS but i still cant make it work. PABX on the other side should recieve a call if i dial 4 digits extension but all i got is busy tone. Where would be the issue?
Thanks for the help!
03-17-2007 07:45 AM
There are many documents on CCO, but since you don't know what the problem could be, this is the generic index:
http://cisco.com/en/US/tech/tk652/tk653/tsd_technology_support_troubleshooting_technotes_list.html
Are you positively sure that the PBX is configured for E&M? Do you have someone on the PBX side that can help checking on things ?
One thing you can try is to call from PBX to router, see which signaling bits are activated, that could help figuring out things.
03-18-2007 07:44 AM
Thanks!
I will apply your recommendation tomorrow. We will be having another test of the circuit. I'll keep you posted of the progress.
RA
03-18-2007 08:30 AM
Good luck.
In case of trouble perhaps you can push the PRI configuration to the customer that would allow having this to work in 5 minutes.
Another convincing argument at times is that with PRI they can see who is calling (ANI), as with standard E&M it is not possible.
03-19-2007 01:13 PM
Hi,
e&m-delay-dial was used and the call was successfully routed to pabx using 4 digits extension.
Thanks for the responses and help!
Ra
03-19-2007 01:25 PM
All is good what ends good!
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