Internal dialling

[blue_man]

If we had some users say on Teams telephony with direct routing and also some users on our current PBX system, is there anyway to setup internal 4 or 6 digit dialling between Teams and the existing PBX and vice versa without incurring call charges?

[#2]

@Linus Cansby

[#3 · Accepted solution]

@blue_man 

Hi,

So in this instance, you would have a SBC sitting between Teams and your PBX. As you use Direct Routing currently, presumably already have that SBC. You would setup a trunk between your SBC and the PBX. Then setup a Dial Plan in Teams to accept 4\6 digit calling using a Voice Route which would send calls to the SBC. Then based on the Called Number, you would send that to the PBX in the format the PBX can receive which could be untranslated or the 4 digit extension translated to a Leading Zero\E164 format. 

There would be no call charges as you're not sending the call out into the PSTN network. It's all internal. Likewise, your PBX could be configured to send calls out to the SBC and then into Teams. E.g. Called number would be translated into E164 format which Teams would accept.

Hopefully that helps. There's lots of partners around who do work with SBC's\Interop with PBX's if you get into trouble.

Regards