E1 R2 digital Call SETUP Trobleshooting

Unanswered Question
Sep 22nd, 2007

Failure to make and recieve external calls

We noticed that a lot of ports remains at blocked at IN STATUS.

BAX-MTY#sh voice port summary

IN OUT

PORT CH SIG-TYPE ADMIN OPER STATUS STATUS EC

=============== == ============ ===== ==== ======== ======== ==

0/0/0:1 17 r2-digital up up blocked idle y

0/0/0:1 18 r2-digital up up blocked idle y

0/0/0:1 19 r2-digital up up clearfwd idle y

0/0/0:1 20 r2-digital up dorm idle idle y

0/0/0:1 21 r2-digital up dorm idle idle y

0/0/0:1 22 r2-digital up dorm idle idle y

0/0/0:1 23 r2-digital up dorm idle idle y

0/0/0:1 24 r2-digital up dorm idle idle y

0/0/0:1 25 r2-digital up dorm idle idle y

0/0/0:1 26 r2-digital up dorm idle idle y

0/0/0:1 27 r2-digital up dorm idle idle y

0/0/0:1 28 r2-digital up dorm idle idle y

0/0/0:1 29 r2-digital up dorm idle idle y

0/0/0:1 30 r2-digital up up blocked idle y

0/0/0:1 31 r2-digital up up blocked idle y

I looked the following thread but I did't find something to change in my configuration.

http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Service%20Providers&topic=Voice%20over%20IP&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.1dde596b

Anyone knows what is the posible cause?

I attach the configuration and debug

Thanks

Attachment: 
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jcsromero Mon, 09/24/2007 - 08:18

!!! UPDATE !!!

There is an update related to this topic:

The problem was corrected on the Service Provider side ... they corrected some parameters inside their network Infrastructure.

This is the IOS Version:

Version 12.4(17)

flash:c2800nm-advipservicesk9-mz.124-17.bin

Thanks

gogasca Mon, 09/24/2007 - 08:17

Checking different customer configs and Telmex recommendation, and all points to this configuration: (Just change channels used)

controller E1 0/1

framing NO-CRC4

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

cas-custom 1

country telmex

category 2

answer-signal group-b 1

***********************************************************************

Please give it a try at the following config:

controller E1 1/0

framing NO-CRC4

clock source line

line-termination 75-ohm

ds0-group 0 timeslots 1-8 type r2-digital r2-compelled ani

cas-custom 0

country telmex

seizure-ack-time 30

category 2

answer-signal group-b 1

dnis-digits min 4 max 4

dnis-complete

timer interdigit incoming 1000

groupa-callerid-end

voice-port 1/0:0

cptone mexico

Check the following:

For inbound calls from Telmex to router you can configure

dnis-digits min x max y

timer interdigit incoming 1000

This will reduce the interdigit timer to 1 sec and we will collect between x and y digits from pbx for the dnis.

Have you already made a loopback test?

Let us know

jcsromero Mon, 09/24/2007 - 08:58

Thanks, I appreciate your advice ... I analyzed your configuration, It seems very useful and I will be using it next time.

I already posted an update about this topic and the problem was corrected on the Service Provider side. I appreciate your help!

Thanks

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