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New Member

Sip trunk to Skype problems since 5 May on UC560

Hello!

Skype made some changes to their platform a few weeks ago and we are not able to make outbound calls anymore.


Before the change we could make calls using the following FROM field in the sip header:

From: "Admin" <sip:9xxx00000xxx@81.xxx.xx.4> where 81.xxx.xx.4 is the WAN IP of our UC560

It worked perfectly for a few months until 5 May. Then is stopped. We contacted skype and they said that we should change the from field to:

From: "Admin" <sip:9xxx00000xxx@sip.skype.com>

how do I change sip header in UC500? Sounds like a trivial thing but can't seem to find a way

I would appreciate any useful advice. Skype says that they support cisco uc500 but their tech support was useless. They don't know themselves how to change it.

13 REPLIES
New Member

Re: Sip trunk to Skype problems since 5 May on UC560

Do this:

voice service voip

sip

   localhost dns:sip.skype.com

Let me know how it goes.


Marcos

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

thank you Marcos, but I'm afraid that change didn't make any difference

l
000402: May 18 16:45:47.777: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Sent:
INVITE sip:74957777707@sip.skype.com:5060 SIP/2.0
Via: SIP/2.0/UDP 79.xxx.xx.45:5060;branch=z9hG4bK7E1D7FD
From: "Inventica Technologies" <>99051000001111@79.xxx.xx.45>;tag=1092E17C-1F72
To: <>74957777707@sip.skype.com>
Date: Tue, 18 May 2010 16:45:47 GMT
Call-ID: A4EDED3F-61D311DF-678DD47C-12D44966@sip.skype.com
Supported: 100rel,timer,resource-priority,replaces,sdp-anat
Min-SE:  1800
Cisco-Guid: 2738975647-1641222623-2503529596-0315902310
User-Agent: Cisco-SIPGateway/IOS-12.x
Allow: INVITE, OPTIONS, BYE, CANCEL, ACK, PRACK, UPDATE, REFER, SUBSCRIBE, NOTIFY, INFO, REGISTER
CSeq: 101 INVITE
Max-Forwards: 70
Timestamp: 1274201147
Contact: <>99051000001111@79.xxx.xx.45:5060>
Expires: 180
Allow-Events: telephone-event
Content-Type: application/sdp
Content-Disposition: session;handling=required
Content-Length: 286

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

Hmm, OK. Here something else you can try:

Address of Record (AOR) usage over SIP trunk

What are the SP UNI requirements for AOR over SIP trunk?

Most SP UNI mandate that the host portion in the below headers of SIP messages represent the domain name of the proxy for authentication purposes

  • From header in INVITE message
  • Contact header in 3xx message
  • Refer-To & Referred-By headers in REFER message

How can CME send the right AOR over the SIP trunk?

This behavior can be achieved using the "host-registrar" CLI under sip-ua - the host portion will now reflect the domain name configured via the registrar-server command

sip-ua
host-registrar
registrar-server proxy.cisco.com
If no registrar server command is present, then the "localhost" CLI will apply

voice service voip
sip
localhost dns:proxy.cisco.com

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

I've just tried

sip-ua
host-registrar
registrar-server sip.skype.com

but it doesn't recognize registrar-server command

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

My apologies, the actual command is "registrar", do not use the dash.

Marcos

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

no, there is no such command

currently I have:

registrar 1 dns:sip.coms.com expires 300
registrar 2 dns:sip.skype.com expires 300
sip-server dns:sip.coms.com
host-registrar
!

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

The registrar commands you have are the ones that I am talking about. Do you still see the IP in the From header?

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

yes, the command was always there.

I still see myskypeuser@myipaddress in the from header

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

OK, try one more thing. Under the voip dial-peer (or peers) pointing to Skype, try this:

voice-class sip localhost dns:sip.skype.com

Marcos

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

Hi Marcos,

I'm afraid that didn't make any difference either

here is my dial peer

!
dial-peer voice 5023 voip
description Skype Out
translation-profile outgoing Skype-out2
destination-pattern 900...........
session protocol sipv2
session target dns:sip.skype.com
session transport udp
voice-class codec 1
voice-class sip localhost dns:sip.skype.com
dtmf-relay rtp-nte
ip qos dscp cs5 media
ip qos dscp cs4 signaling
no vad
!

and here is the debug extract

000419: May 19 10:59:27.679: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
Received:
SIP/2.0 403 Forbidden
From: "Inventica" <>99011111111@7x.xxx.xxx.xx>;tag=147C218C-20E0
To: <>74957777707@sip.skype.com>;tag=ca90d13f-13c4-4bf3c48f-673ace76-2035561b
Call-ID: 6D3A0E2A-626C11DF-988ED47C-12D44966@sip.mydomain.com
CSeq: 101 INVITE

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

One of these methods should have worked. You will need to open a TAC case so we can determine what in your configuration is preventing the name from being added to the From: field.

Thanks,


Marcos

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

Solution found!

I had to add

voice-class sip localhost dns:sip.skype.com preffered

to dial peers. You were very close Marcos. It didn't work without preffered for some reason

New Member

Re: Sip trunk to Skype problems since 5 May on UC560

True, this is needed when multiple registrars are configured. Sorry for missing that.

http://www.cisco.com/en/US/partner/docs/ios/voice/command/reference/vr_v1.html#wp1131649

Usage Guidelines

Use the voice-class sip localhost command in dial peer voice configuration mode to override the global configuration on Cisco IOS voice gateways, Cisco UBEs, or Cisco Unified CME and configure a DNS localhost name to be used in place of the physical IP address in the From, Call-ID, and Remote-Party-ID headers of outgoing messages on a specific dial peer. When multiple registrars are configured for an individual dial peer you can then use the voice-class sip localhost preferred command to specify which host is preferred for that dial peer.

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