E1 access problem in SRST

cristian.munoz · ‎03-26-2007

Hi,

I upgraded the IOS and the IP Phone are registered, but for outgoing calls not works. I made a call using CSIM command and the call works. The router are connect to PSTN by E1 PRI.Pls. see the SRST config:

call-manager-fallback

max-conferences 8 gain -6

transfer-system full-consult

ip source-address <IP CCM> port 2000

max-ephones 96

max-dn 120

access-code pri 9 direct-inward-dial

time-zone 11

date-format dd-mm-yy

This is the dial-peer for outgoing calls:

dial-peer voice 100 pots

destination-pattern 9

direct-inward-dial

port 0/0/0:15

Regards

Cristian

alessandro.dona · ‎03-27-2007

Hi,

try with destination-pattern 9T.

cristian.munoz · ‎03-27-2007

Dear Ale

Are you sure that this work?.

I made tests using 9.T and do not work.

paolo bevilacqua · ‎03-27-2007

9.T and variations are indeed right in most cases. To find out why calls are failing, do "debug isdn q931" and "term mon".

cristian.munoz · ‎03-27-2007

Dear Paolo

See the debug q931.

Mar 23 04:08:45.011: ISDN Se0/0/0:15 Q931: TX -> SETUP pd = 8 callref = 0x0091

Bearer Capability i = 0x8090A3

Standard = CCITT

Transfer Capability = Speech

Transfer Mode = Circuit

Transfer Rate = 64 kbit/s

Channel ID i = 0xA9839F

Exclusive, Channel 31

Progress Ind i = 0x8183 - Origination address is non-ISDN

Calling Party Number i = 0x0180, '6912'

Plan:ISDN, Type:Unknown

Called Party Number i = 0x81

Plan:ISDN, Type:Unknown

*Mar 23 04:08:45.039: ISDN Se0/0/0:15 Q931: RX <- SETUP_ACK pd = 8 callref = 0x8091

Channel ID i = 0xA9839F

Exclusive, Channel 31

Progress Ind i = 0x8288 - In-band info or appropriate now available

*Mar 23 04:08:46.171: ISDN Se0/0/0:15 Q931: TX -> DISCONNECT pd = 8 callref = 0x0091

Cause i = 0x8090 - Normal call clearing

*Mar 23 04:08:46.191: ISDN Se0/0/0:15 Q931: RX <- RELEASE pd = 8 callref = 0x8091

*Mar 23 04:08:46.191: ISDN Se0/0/0:15 Q931: TX -> RELEASE_COMP pd = 8 callref = 0x0091

paolo bevilacqua · ‎03-27-2007

Hi, there is no called number in setup. Sorry, I'm not familiar with CCM/SRTS, hope someone can help better.

cristian.munoz · ‎03-27-2007

Hi,I either i see it.

I configured SRST using FXO and it has work fine, but this is my first tiem using E1 PRI.

I access to E1 channel but i can?t dial the follow digits.

cristian.munoz · ‎04-05-2007

Hi,

Who has any idea?

I can?t do outbound calls by E1 in FallBack mode.

paolo bevilacqua · ‎04-05-2007

Hi,

please change the dial-peer for outgoing calls to:

destination-pattern 9T

check again with "debug isdn q931" what number goes out, if 9 is not removed, you will need to configure a translation-rule to remove it (not difficult).

Hope this helps, please rate all useful posts!

pacameron · ‎04-08-2007

Instead of using the 'access-code pri 9 direct-inward-dial' command, remove it and add 'secondary-dialtone 9'.

The 'access-code' commands actually creates temporary dial peers in the 20XXX range and these could be conflicting with your existing dial peers. You can check this by entering 'show call-manager-fallback dial-peer' while in SRST to see if this is happening.

With the 'secondary-dialtone 9' command, the router will play a different dial tone after dialing the '9' access code, this number and the rest of the digit string will then match on dial peer 100 (assuming the destination pattern on this dial peer is 9T) ... the leading 9 will be stripped off and the call should proceed correctly.

cristian.munoz · ‎04-08-2007

Dear Paul

Last Thursday i run the command destiantion-pattern 9T and adding secondary-dialtone 9 , and this works!.

Thanks