cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
2148
Views
0
Helpful
4
Replies

E1 ISDN L3 ISSUE

tommyphelan
Level 1
Level 1

Gateway is a 2811 with NM-4VWIC-MBRD card.... with 5 channels E1 PRI-group using MGCP backhauled to CCM 7.02

The ISDN debug command in MGCP gateway shows "Recovery on timer expiry" , see below:

*Mar 16 18:44:59.822: ISDN Se0/0/0:15 Q931: RX <- SETUP pd = 8  callref = 0x0400
        Bearer Capability i = 0x9090A3
                Standard = CCITT
                Transfer Capability = 3.1kHz Audio
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA98381
                Exclusive, Channel 1
        Facility i = 0x9FAA06800100820100A112020101020100800A41766179612048333233
        Calling Party Number i = 0x80, '20063'
                Plan:Unknown, Type:Unknown
        Called Party Number i = 0x80, '35000'
                Plan:Unknown, Type:Unknown
        Sending Complete
*Mar 16 18:44:59.842: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8  callref = 0x8400
        Channel ID i = 0xA98381
                Exclusive, Channel 1
*Mar 16 18:44:59.926: ISDN Se0/0/0:15 Q931: TX -> ALERTING pd = 8  callref = 0x8400
        Facility i = 0x9FAA06800100820100A1100201010201018008436973636F534950
        Progress Ind i = 0x8088 - In-band info or appropriate now available
*Mar 16 18:45:01.006: ISDN Se0/0/0:15 Q931: RX <- DISCONNECT pd = 8  callref = 0x0400
        Cause i = 0x85E6 - Recovery on timer expiry

I have looked at all the T3xx timers in the CUCM and they all look OK.

I went to this link :

Any ideas anyone has would be great .

i have attached my MGCP setup to this message.

regards,

Tommy

4 Replies 4

paolo bevilacqua
Hall of Fame
Hall of Fame

To what are you connecting ?

The cisco side is behaving normally so you should look into the other equipment actually.

My setup is :

sip proxy server  -----> audioCodes Mediant Server 1000 ---> Cisco 2811 MGCP ----> Cisco UCM

My call comes from a sip proxy server into AudioCodes server via SIP trunk which is then connected with E1 QSIG link to MGCP gateway.

I can ring from Cisco SIP/SCCP phones through the proxy server sucessfully but when i try and ring  the Cisco phones via the proxy server

, i get the SIP recovery timer error .

I see that the SETUP msg is received in the MGCP from audioCodes server, the mgcp then sends Call_proc and Alerting messages to Cisco UCM, i am wondering what else Cisco UCM is expecting which causes a timer to expire.

The Cisco phone will ring once and then it is disconnected.

what else Cisco UCM is expecting which causes a timer to expire.

Nothing, the timer expiration and disconnect happens in the other device, reason for which you need to investigate there why that happens.

ok thanks for your help, i will look into the other box now..

Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: