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What are the correct normalization rules to enable dial-out from a Lync conference bridge to Cisco Callmanager 7.1.5 extension?

Posted on 2011-03-01
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Last Modified: 2012-05-11
Hi.  I need to create the proper normalization rules in Microsoft Lync to enable dial-out to internal four digit extensions on a Cisco Communications Manager 7.1.5 phone system.  The numbers in Lync are stored in E.164 format (+1 (262) 555-0123).

I have built normalization rules which strip all but the last four digits of the number to dial, but the call still fails in Lync, with the error that the number is not in service.  See the attached file that contains the rule.

Does anyone have experience with bridging a Lync (or OCS) and Cisco voice environments that knows how this should be setup?


 screenshot of normalization rule.
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Question by:mptcmanage
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11 Comments
 
LVL 33

Expert Comment

by:MikeKane
ID: 35011371
I had this EXACT same issue.   I was using normalization to strip off all but the last 4 of a E164 formatted number to send to the SIP trunk to CUCM.    I discovered that this does not work.    Instead, Use normalization to format everything LYNC sends to a e164 number +12223334444 and route this through the SIP trunk.   Then on the sip trunk, use translation rules to change it to a 4 digit extension here....     I banged my head over this for a week.  


So on the normalization rules, I use:
National                   ^1?([2-9]\d\d[2-9]\d{6})(\s*\S*)*$                     +1$1
International      ^011(\d{7,})$                                                             +$1
7xxx Extensions      ^(7\d{3})                                                     +1222333$1
NA-ServiceCodes      ^([2-9]11)$                                                     $1

This way, everything that is dialed becomes a +12223334444 style number.     In case someone just dials a 4 digit extension, i.e. 7344, this also becomes a full E164 number.  

Then on the SIP trunk config, use a translation pattern to match
(assume 222 is areacode and 333 is prefix)
^\+1222333(79\d{2})$   becomes    $1       (strip off all but the last 4)
^\+(\d*)$  becomes                           9$1     (i use 9 for an outside line)
That way the trunk handles stripping off the extension and adding a outbound prefix for everything else.  


Hope that helps.


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Author Comment

by:mptcmanage
ID: 35017375
This is a good start.   I have internal four digit extensions working.  What do you translation patterns look like to get external calls routed to the PSTN?
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MikeKane earned 2000 total points
ID: 35017962
I use these 2:
^\+1222333(79\d{2})$   becomes    $1       (strip off all but the last 4)
^\+(\d*)$  becomes                           9$1     (i use 9 for an outside line)

The 1st one takes any e164 that starts with +1222333 and leaves the last 4 which is are the extensions.   So +12223337001 becomes 7001.  

The 2nd one takes every other number and tags on a 9 to go outbound.   So +12223335555 becomes 912223335555.  

That's all I needed.   Your setup may be different, especially if you need to route out to other SIP trunks for remote branches.
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Author Comment

by:mptcmanage
ID: 35018081
Hmm.  The first rule for internal extension works well.  The second rule for outside calls does not work, even to custom numbers that are already properly formatted.

Any advice?  I'm a Lync novice.
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LVL 33

Expert Comment

by:MikeKane
ID: 35018321
Do you have any other rules in there?  

On that rule, I assumed the '9' would be the number to get an outside line.    Is true in your environment.    From a desk phone on CM, what would a sample oubound number look like.     On the CM, do you have and translation patterns that could further adjust the number.      On the PSTN router, you should run some debugs so show outbound dialed numbers and see if they are coming across with the proper format.   For example "debug isdn q931 detail"    then "term monitor" to watch the packets.(Don't leave debugging on indefinitely)
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Author Comment

by:mptcmanage
ID: 35018351
We do use 9 for outbound access.  A sample outbound number is 9-1-262-334-3413.  There are minimal translation patterns on CM and they do not change the number.  I'll have a look at the router to see what digits are being sent, if any.
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Author Comment

by:mptcmanage
ID: 35022356
I don't see any digits making it to the router.  This could be in the css and partition config, which I'll have to look at tomorrow.
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LVL 33

Expert Comment

by:MikeKane
ID: 35028014
Any luck today?
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Author Comment

by:mptcmanage
ID: 35031126
Not yet.
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LVL 33

Expert Comment

by:MikeKane
ID: 35098769
Updates?
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Author Comment

by:mptcmanage
ID: 35131414
The problem is in CallManager.  This will suffice for Lync.  I will post the complete solution once testing is complete.
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