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New Member

Linksys SPA9000 & CME SIP Trunk

Hi All,

I'm trying to connect a Linksys SPA9000 unit with our CME system. I appear to have a problem with SIP authentication.

Here's the relevant part of the debug

Oct 6 02:12:13.828: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:


SIP/2.0 401 Unauthorized

Via: SIP/2.0/UDP;branch=z9hG4bK-673c7a3d

From: SPA9000 <sip:77444@>;tag=d98fa6aeb26b0d36o2

To: SPA9000 <sip:77444@>;tag=2B6C78A4-228D

Date: Fri, 06 Oct 2006 02:12:13 GMT

Call-ID: 51081f81-d6fb31c7@

Server: Cisco-SIPGateway/IOS-12.x

CSeq: 54829 REGISTER

WWW-Authenticate: Digest realm="",nonce="AD3B854F378AD8DD",algorithm=MD5,qop=aut


Content-Length: 0

I originally thought that this was an issue with MD5 Authentication but now I'm thinking that I haven't configured the CME correctly. I've got the Linksys SPA942 phones registered and working fine, I thought the SIP trunk would be similar - or am I off the mark?

Anyone got a relevant sample part of the CME config?

New Member

Re: Linksys SPA9000 & CME SIP Trunk

I've got this working OK. I didn't have the sip-ua configured properly. SPA9000 now registering OK and I can call fine from the Linksys phones to the CME phones, only hiccup is that I need to configure the DID on the SPA9000 to allow incoming calls - in progress

New Member

Re: Linksys SPA9000 & CME SIP Trunk

Hi John,

I'm trying to get a similar thing working. Would you be able to post the config from the Cisco router for the SIP connection?

Many thanks,


New Member

Re: Linksys SPA9000 & CME SIP Trunk

Hi Mark,

In the end it was quite straight forward; just use a dial-peer to route calls to the SIP server. Here's the dial-peer config

dial-peer voice 200 voip

session protocol sipv2

session target sip-server

incoming called-number 77...

dtmf-relay rtp-nte

codec g711ulaw

I just specified the sip-server referred to in the sip-ua submenu, as below although you could just specify the ipv4:x.x.x.x address


sip-server ipv4:

You need to use the dtmf-relay rtp-nte so that the keys are recognised when using voicemail and the like.

It works well, the only thing was that calls from any Linksys phone showed the calling number of the SPA9000 SIP proxy - I never found a way to get around it.

Good Luck

New Member

Re: Linksys SPA9000 & CME SIP Trunk

Hi John,

Many thanks for the info - appreciate it!



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