SIP Trunk between Cisco CUBE and MS Teams is not coming up

[mohamedyare]

I am trying to integrate Cisco CUBE with Microsoft Teams. However, I am facing a SIP trunk issue where the CUBE is not receiving an 'OK' message from the MS Teams SIP proxy (sip.pstnhub.microsoft).

I am attaching the output of the SIP-UA connection, my lab topolgy, MS Direct Routing config and the CUBE configuration:

The SIP connection comes up one time but goes down when I make some changes. I am not sure which change caused the issue, probably in the SIP profile.

Your input will be appreciated.

Configuration is attached

[mohamedyare]

new sip-au connection status is attached

[b.winter · Accepted solution]

What is your problem now?

Just going through the config, it's just messed up.
Some points as an example:

SIP Profile 299, rules 10, 20, 40 and 50 are incorrect.
SIP Profile 200, rules 40 and 50 are missing. 70 is not correct.
So you better go through the documentation again and check your SIP profiles.

Do you have "media bypass" activated in your MS tenant? Which seems you do, because you have rules for this in the SIP-profiles, then you are missing the ICE-lite configuration.

voice class tenant 200
is missing the crypto suite.
"handle-replaces" is not needed.

Where is the "sip-ua" config part?

Where are all the dial-peers from / to Teams?

[mohamedyare]

Mr. B. Winter, thank you so much for pointing out a few things. When I looked back at the profiles and made some changes, everything worked fine now. I really appreciate your effort

[yourid_98]

Which link did you use to properly configure the SIP trunk between MS Teams and CUBE gateway?

[Roger Kallberg]

Direct Routing for Microsoft Phone System with Cisco Unified Border Element (CUBE)