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back to back VG - Recovery on timer expiry

xtam1
Beginner
Beginner

Dear All,

Two Cisco routers are connected as follows:

VoIP--> R1 -->ISDN--> R2 -->VoIP

Appreciate any ideas or recommendations to get successful calls from R1 to R2?

The Problem: When the call leaves R1 to R2 over the ISDN link in between i see the call coming on R2 and then disconnected with the following disconnect reason:

Cause i = 0x82E6 - Recovery on timer expiry

R1 config:

---------------

!

interface Serial4/0:15

no ip address

encapsulation hdlc

no logging event link-status

isdn switch-type primary-net5

isdn overlap-receiving T302 5000

isdn protocol-emulate network

isdn incoming-voice voice

no cdp enable

!

dial-peer voice 10 pots

preference 1

destination-pattern 000T

progress_ind alert enable 8

direct-inward-dial

port 4/0:15

!

dial-peer voice 11 pots

preference 3

destination-pattern .T

progress_ind alert enable 8

direct-inward-dial

port 4/0:15

forward-digits 5

!

R2 config:

--------------

!

interface Serial2/0:15

no ip address

encapsulation hdlc

no logging event link-status

isdn switch-type primary-net5

isdn overlap-receiving T302 4000

isdn incoming-voice voice

isdn send-alerting

isdn sending-complete

no cdp enable

!

dial-peer voice 99 pots

tone ringback alert-no-PI

preference 2

destination-pattern .T

progress_ind setup enable 3

progress_ind alert enable 8

progress_ind progress enable 1

progress_ind connect enable 1

incoming called-number .T

no digit-strip

direct-inward-dial

port 2/0:15

!

dial-peer voice 100 voip

destination-pattern 89...

progress_ind setup enable 3

progress_ind progress enable 1

progress_ind connect enable 1

voice-class codec 1

session target ipv4:10.1.1.2

incoming called-number .T

no vad

!

Debug isdn q931 from R2

------------------------------------

*May 7 13:39:25.129: ISDN Se2/0:15 Q931: RX <- SETUP pd = 8 callref = 0x014D

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA98381

Exclusive, Channel 1

Net Specific Fac i = 0x00E2

Calling Party Number i = 0x2181, '4364574474'

Plan:ISDN, Type:National

Called Party Number i = 0xA1, '89222'

Plan:ISDN, Type:National

*May 7 13:39:25.133: ISDN Se2/0:15 Q931: TX -> SETUP_ACK pd = 8 callref = 0x814D

Channel ID i = 0xA98381

Exclusive, Channel 1

*May 7 13:39:34.841: ISDN Se2/0:15 Q931: RX <- DISCONNECT pd = 8 callref = 0x014D

Cause i = 0x82E6 - Recovery on timer expiry

*May 7 13:39:34.845: ISDN Se2/0:15 Q931: TX -> RELEASE pd = 8 callref = 0x814D

*May 7 13:39:34.853: ISDN Se2/0:15 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x014D

--------------------------

Any ideas or recommendations to get successful calls from R1 to R2?

Thanks in advance.

2 REPLIES 2

paolo bevilacqua
Hall of Fame Master Hall of Fame Master
Hall of Fame Master

Hi, you've asked this already in another thread where I replied. Please do not open duplicate posts.

i wasn't sure under which forum to post, sorry for duplication...

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