Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

Users does not hear answering machines and PSTN messages

Hi,

 

We are experiencing issues when we place a call to the PSTN and it is redirected to a answering machine, for example if I place a call to my cell phone and it is powered off normally it will be  answered by the voice mail of my celular company, but in this case whe have two strange behaviors:

 

1.- the call keeps ringing like my cell phone were available.

2.- the call is connected but we are experiencing something like one way audio, we cannot hear audio from the voicemail, but checking my voice mail on my cell phone I realized that I am able to leave a message.

 

This two issues occours randomly and for both home answering machines and cell phones voicemails, with regular calls we have no problems.

 

we have:

 

     CUCM 9.1

     GW 3900 - 15.1 (4) M7

 

The GW is connected with the CUCM via SIP, and with the PSTN with E1 R2.

 

Phone > CUCM > SIP > Gateway > E1 R2 > PSTN

 

Here is part of the configuration that I think could be relevant:

 

!

!

voice call convert-discpi-to-prog

!

voice service voip

no ip address trusted authenticate

allow-connections sip to sip

signaling forward unconditional

sip

  bind control source-interface Loopback0

  bind media source-interface Loopback0

  rel1xx disable

  min-se 360 session-expires 360

  header-passing

!

voice rtp send-recv

!

controller E1 3/1

framing NO-CRC4

line-termination 75-ohm

ds0-group 0 timeslots 1-15,17-31 type r2-digital r2-compelled ani

cas-custom 0

   country telmex

   release-guard-time 2

   disconnect-tone

   category 2

   answer-signal group-b 1

   ani-digits min 4 max 20

   answer-guard-time 500

   timer interdigit incoming 1000

   groupa-callerid-end

   dtmf timer inter-digit 250

description E1 para PSTN

!

voice-port 3/1:0

cptone MX

!

dial-peer voice 401 pots

  description ** LLAMADAS A CELULAR LOCAL  y LD**

  preference 1

  destination-pattern 9044..........

  port 3/1:0

  forward-digits 13

  no register e164

 

I hope you can help me.

 

Regards.

2 REPLIES

Users does not hear answering machines and PSTN messages

Hi.

Can you please post both the output of a debug ccsip message and a deb isdnq931 while calling to a switched off mobile phone?

Thanks in advance.

Regards

Carlo

Please rate all helpful posts

"The more you help the more you learn"

Please rate all helpful posts "The more you help the more you learn"
New Member

Re: Users does not hear answering machines and PSTN messages

Hi Carlo

I posted the output of a debug ccsip messages.

We do 2 calls

1st At 10:27 and the result was continuous ringing.

called number:90445563185547

calling number: 7038

2nd At 10:30 and the result was one way audio.

called number:90445563185547

calling number: 7038

Regards.

217
Views
0
Helpful
2
Replies
CreatePlease to create content