cme 4.0 register with multiple SIP provider

Unanswered Question
Mar 12th, 2007

Hello ,

I need to configure my cme 4.0 to send outgoing call throught different SIP provider .

I have already tryed with only 1 provider and all work fine .

Thanks .

I have this problem too.
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Paolo Bevilacqua Mon, 03/12/2007 - 09:18

Registration and making calls are two different things, you do not necessarily need to be registered to make outgoing calls.

Under "sip-ua", configure username/password/realm, and the router should use them in the authentication phase for each ITSP.

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leonardo.vecchi... Mon, 03/12/2007 - 09:56

Hi ,

I have tried to configure another username and password , the system d'ont permit me and show the message "only one username are permit per device"

Paolo Bevilacqua Mon, 03/12/2007 - 21:52

Ok, it seems to me that the current IOS is severely limited in this area:

1st, in "sip-ua" you can configure multiple (up to 5) password/realm combinations, but a single username. That means, if can have different ITSP to assign you the same authentication username, you can use multiple ITSP.

2nd, the authentication configuration in "dial-peer" mode, is available only for pots dial-peer, not voip. This appears like a bug in my opinion, or I would be very curious to know the reason why.

The above is actually documented at:

I've tried the configuration in sip-ua mode, as long the username is the same, you can actually configure multiple password/realm combinations. One final comment, the output from CLI on succesful configuration like Updating password for realm: xxx is really non-standard in IOS.

Hope this helps, if so, rate this post.

leonardo.vecchi... Wed, 03/14/2007 - 01:58

Hi ,

you tasks that the problem may be resolved upgrading the CME , now is ver. 4.0 (C2801-SPSERVICESK9-M), Version 12.4(9)T1 .

Paolo Bevilacqua Wed, 03/14/2007 - 10:17

No, this limitation is not version dependent. I have a feeling it may be corrected in a future because it so absurd, However I have no basis to support my thinking.

Hope this helps, if so please rate post!

that doesn't look like a bug, but is reasonable:

authentication aids billing and CAC on provider side. If you could use authentication on voip dial-peers then the ip-device in your network using this dial-peer could authenticate itself the same way as a gateway in question. but if it is an analog or tdm device, it cannot do that so we have authentication only under pots dial-peers.


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