ISDN Dialing - Erratic Behaviour

[keshavahp]

Hi

Network Design as follows -

• Individual branches dial and establish a connection to the Central Location; in case of its primary leased line failure between the Branch and Central Location.

• Central Location dials and establishes a connection to the Data Center. in case of its primary leased line failure between the Central Location and Data Center.

• All branches are spread across the Country and have been activated with STD calling (Interstate dialing / calling).

Problem facing -

• One of the Branch with 2801 Router+2BRI S/T card + 12.4(3B) IOS dials and establishes connection to the Data Center which is located in a different state successfully.

• But this above branch does not dials a test call to its Central Location; which is again located in a different state. (Point to be noted: "STD Dialing is activated on this Branch, that's why it is able to make a call to the Data Center successfully, but fails making a call to the Central Location *01202775453*").

Can any one please HELP me to rectify this issue.

Please find the attached Debug q931 & q921 output of the Branch router when dailed *01202775453* and fails.

Regards,

Keshav

[spremkumar]

Hi

Have you checked the configurations of both the central location which requries to accept the call and the other location which is already accepting the call from the branch ?

But as per the error message this is something to do with your central location's telco settings which you need to contact either BSNL/MTNL to get it resilved.

C1 - Bearer capability not implemented

The network cannot provide the bearer capability that the user requests.

Contact the telco to troubleshoot further.

http://cisco.com/en/US/tech/tk801/tk379/technologies_tech_note09186a008012e95f.shtml

regds

[keshavahp]

Hello Mr. Prem,

Thanks for responding!

I have checked with BSNL at Central Location - they claim that all calls are allowed on the PRI link of Central Location and no such restrictions have been configured.

Regards,

Keshav

[dongdongliu]

hi,

are you sure that the switch-type and spid number are both set right?

[keshavahp]

Hello Mr. Liu,

Here in India Telco's will not use the SPID no#, hence SPID's are not configured.

ISDN Switch type is configured with the right one *basic-net3*.

Can this be a IOS Bug?

[dongdongliu]

hi Keshava

could you post any configuration?

[dongdongliu]

hi Keshava

It seems the L2 is well(from router to isdn switch), but, what`s about L3 info?

could you show us "show dialer/isdn status & debug dialer" info?

thank you

regards

dongdong

[yxsjwsb]

Hey, I'd use the pri debugger tool (free - pippinsoftware.com ) to keep up with that failures. It may reveal that only certain B chans are affected.