UC540 transfer calls to Microsoft Lync 2013 Extensions

[Tarquin Joseph]

Hello,

I'm trying to integrate my UC540 with Microsoft Lync 2013 with the UC540 as the media gateway.  So far I can call UC540 extensions from the Lync clients and make external calls through the UC540.

However I can't make any calls from UC extensions to Lync clients.  I've included what I believe are the relevant portions of the configuration. Lync extensions are 52xx and UC extensions are 2xx.

When I try to dial the Lync Extension from the UC phone I get busy tone.

Any assistance with this would be greatly appreciated.

voice service voip

ip address trusted list

  ipv4 0.0.0.0 0.0.0.0

allow-connections h323 to h323

allow-connections h323 to sip

allow-connections sip to h323

allow-connections sip to sip

supplementary-service h450.12

no supplementary-service sip moved-temporarily

no supplementary-service sip refer

fax protocol none

no fax-relay sg3-to-g3

sip

  registrar server expires max 3600 min 3600

  localhost dns:sip.skype.com

  no update-callerid

  sip-profiles 1000

!

!

voice translation-rule 4000

rule 1 /\(52..\)/ /+\1/

!

!

dial-peer voice 500 voip

description ** SIP Trunk to Lync Core **

translation-profile outgoing LYNC_ADD_PLUS

destination-pattern 52..

notify redirect ip2pots

session protocol sipv2

session target ipv4:192.168.254.24:5060

session transport tcp

dtmf-relay rtp-nte

codec g711ulaw

fax rate disable

fax protocol pass-through g711ulaw

no vad

!

!

translation-profile outgoing LYNC_ADD_PLUS

destination-pattern 52..

notify redirect ip2pots

session protocol sipv2

session target ipv4:192.168.254.24:5060

session transport tcp

dtmf-relay rtp-nte

codec g711ulaw

fax rate disable

fax protocol pass-through g711ulaw

no vad

[support]

Hi,

Do you have a "voice translation-profile LYNC_ADD_PLUS" ?

Have you configured the TCP Port 5060 on Mediation Server with TopologieBuilder?

Do you see an entry like "0.0.0.0:5060" when you execute "netstat -an" on Mediation Server CLI?

The Lync User has as telephone-URI like "tel:+52XX" ? (include "+")

I configured a connection to Lync as follows:

dial-peer voice 100 voip
destination-pattern 1..
session protocol sipv2
session target ipv4:192.168.100.254:5068
session transport tcp
voice-class codec 1
voice-class sip dtmf-relay force rtp-nte
dtmf-relay rtp-nte
no vad

My Lync Users telephone-URI is for example "TEL:120" (without "+")

best regards

Matthias

[Tarquin Joseph]

Hi Mattias,

Thanks for your reply.  It's very appreciated.

I actually got  the problem resolved.  I used  "debug ccsip messages" and found out that the system was sending SIP invite messages using sip.skype.com - apparently from a previous Skype sip trunk configuration using CCA that I had done quite some time ago.

I removed the Skype configuration and it still wasn't working.  The invites to the Lync Mediation were now going using the data IP which is not what the Lyn server was expecting.  This command solved my issue:

*************

sip-ua

registrar dns:hostname_of_sip_registrar.com expires 3600

I have a DNS entry in my servers that points to the default SIP registrar IP (10.1.1.1).  The command also has an option to use the IP directly but I configured Lync to look for the hostname as it's more flexible.

Many thanks again for your interest and support.

Regards,

Tarquin.