Cisco CME call fwding between SIP trunks

[billobob123]

Hi I am having the same exact problem as this person had

http://forums.whirlpool.net.au/archive/1509242

I tried what was suggested but it did not help, when calling from an exterior line and the call is coming from my sip provider the exchange server never pic up the call just keeps ringing after the phone itself that is the receiving phone stop ringing.

internally the voice mail service works, all other aspects of the router and phones are working just fine.

could you help please.

oh and ive included my config just to make things a bit easier ;°)

[clileikis]

Check out the following post:  https://supportforums.cisco.com/message/3089513#3089513

Although your issue wasn't exactly the same, it could be that the exchange server is expecting digits in a certain format (SIP Diversion header, etc) in order to answer the call.

HTH,

Chris

[billobob123]

hi just tried it, and it did not work.... still no divert from external call to voicemail.

[billobob123]

thanks, i have not yet tried it but from what the thread says it makes sence.

ill give it a shot and let you know how it goes.

best

bertrand

[billobob123]

And here are two debugs, internal call to voice mail, as well as  external, i can see that the forwardee in the external is messed up but  how to i tell it that I want 1001 to forward to 1000 if the phone is not  picked up?

[billobob123]

Hi

i tried this and well it did help either ...

http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/admin/configuration/guide/cmetrans.html

SIP: Configuring SIP-to-SIP Phone Call Forwarding

To configure SIP-to-SIP call forwarding using a back-to-back user agent  (B2BUA) which allows call forwarding on any dial peer, perform the  following steps.

Prerequisites

•Cisco CME 3.4 or a later version.

•Connections between specific types of endpoints in a Cisco IP-to-IP gateway must be configured by using the allow-connections command. For configuration information, see the "Enabling Calls in Your VoIP Network" on page 84.

Restrictions

•SIP-to-SIP  call forwarding is invoked only if that phone is dialed directly. Call  forwarding is not invoked when the phone number is called through a  sequential, longest-idle, or peer hunt group.

•If call forwarding is configured for a hunt group member, call forward is ignored by the hunt group.

•In  Cisco Unified CME 4.1 and later versions, Call Forward All requires SIP  phones to be configured with a directory number (using dn keyword in number command); direct line numbers are not supported.

SUMMARY STEPS

1. enable

2. configure terminal

3. voice register dn dn-tag

4. call-forward b2bua all directory-number

5. call-forward b2bua busy directory-number

6. call-forward b2bua mailbox directory-number

7. call-forward b2bua noan directory-number timeout seconds

8. call-forward b2bua unreachable directory-number

9. end

[billobob123]

added two more debugs,

been looking at various post to see where this is coming from and well i have yet to see a good reason for this,,, other then do i need a second DID for voicemail to work, i hope not;

[billobob123]

Okay good news i figured it out! Pretty happy about that,

big thanks to this site which guided me to the sollution for my particular setup.

http://social.technet.microsoft.com/forums/en-US/exchangesvrunifiedmessaging/thread/9683709e-0621-4ce5-a663-f01b6ac4401f/

i have also posted my config for those who would be interested.

good day ya all