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How to configure the bundle ISDNs for voice calls using one pilot No.

Hi,

One company has 3 ISDNs connected to its PBX for customer service. Each B-chanel has one DID number, and use the first No. as the pilot No. In the PBX enviornment, the 3 ISDNs can works fine. The company's customer can have 6 calls to the Pilot No. at the same time.

Now the company wants to move this environment to Cisco IPT. Use 2 VIC-2B-NT/TE for the three ISDNs on Cisco 1751 router as the voice gateway. I found I can only dial two calls of the Pilot No. If I have the 3rd call, I can only have the no-answering tone.

And on the gateway, I use "Debug isdn q931", I did not find any traffic coming in.

Is there any specific configuration on voice gateway for the bundle of ISDNs?

CCM 3.3(3), Cisco 1751, IOS 12.3(2)T2, 2 VIC 2B-NT/TE

Thanks

Joe

1 REPLY
Silver

Re: How to configure the bundle ISDNs for voice calls using one

check the below link, it has criteria to support ISDN calls

http://www.cisco.com/warp/public/788/products/2isdn_bri_vic.html#nosupport

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