Forum Discussion
Solved
Direct Routing - PABX Extension Number
Dear all,
I have a question related to "classic" extension numbers which commonly can occur when customers use direct routing to/from users on a PBAX.
For my Teams' users, I have set via Set-CsUser the extension number in the following examples
Teams User A: -OnPremLineURI "tel:4101"
-or-
Teams User B: -OnPremLineURI "tel:+18121234567;ext:4101"
Users on the PABX are all in the range of a 4 digit number plan.
Issue 1: Calling Teams
A user on the PABX dials 4101, which is correctly routed to the SBC and to Teams. I get a 499 not found when the number format is entered as "Teams User B". It does ring when I use "Teams User A". From the documentation, I thought the writing form of Teams User B would archive the same goal? Am I missing something?
Issue 2: Calling PABX Users
Regardless of what I do, the FROM and TO numbers in the INVITE to the PABX from Teams DR are transformed and e164 formatting is partially added. For example, Teams' User A (4101) calls PABX user (4102). The FROM is changed to +444101 (I assume as the service location is set to the UK while I applied the license to the user? Cannot find another place where UK is related to the user) and the TO is changed to +4102. Can I configure Direct Routing to leave all numbers untouched, in the from and in the to?
Thank you all in advance!
- Hi,
the behavior in issue 1 is correct. Teams only tries to match the phone number. So to use that approach you have to normalize the 4 digits (YYYY) to the e.164 (+44XXXXXXYYYY) on your SBC before you send it to Teams.
In general I would recommend to use full e.164 in Teams. This would mean to transform 4 digit numbers to e.164 from PBX to Teams. The other way round you have to do the opposite and strip the digits before you send it to the PBX.
The issue 2 is related to the dial plan that got applied by default depending on your country. If you want to implement extension dialing to your pbx you need to create your own user level dial plan.
Regards,
Paul
- Hi,
the behavior in issue 1 is correct. Teams only tries to match the phone number. So to use that approach you have to normalize the 4 digits (YYYY) to the e.164 (+44XXXXXXYYYY) on your SBC before you send it to Teams.
In general I would recommend to use full e.164 in Teams. This would mean to transform 4 digit numbers to e.164 from PBX to Teams. The other way round you have to do the opposite and strip the digits before you send it to the PBX.
The issue 2 is related to the dial plan that got applied by default depending on your country. If you want to implement extension dialing to your pbx you need to create your own user level dial plan.
Regards,
Paulpaul-lange , thank you for taking your time to respond.
For my second issue, I think I will be out of luck as the country service dialplan is always applied at the end of all dial plans? Which will not make it possible to send a call out without been transformed to "something" with a +. I will take up the work in the SBC to fix this.
NormalizationRules :
{Description=DE International Dialing Rule;
Pattern=^00(\d+)$;
Translation=+$1;
Name=DE Intl Dialing;
IsInternalExtension=False,
Description=DE Extensions rule;
Pattern=^((\+)?(\d+))(;)?(ext|extn|EXT|EXTN|x|X)(=)?(\d+)$;
Translation=$1;ext=$7;
Name=DE Extension Rule;
IsInternalExtension=False,
Description=DE Long Distance DialingRule;
Pattern=^0(\d+)$;
Translation=+49$1;
Name=DE Long Distance;
IsInternalExtension=False}It doesn't need to. Just amend your global dial plan and then add a new normalisation rule.
Go to Advanced and type in the If (\d{4})
Then $1 in the "Then do this"
Then if you test, you'll see putting in 4444
outputs 4444
As you talk about SBC's, you're obviously using Direct Routing so just ensure you have a Voice Route that matches the 3 digit number. Then 4444 will go straight to the SBC without any addition of +44 or +49 etc
Hope that helps.
