Alex & Kaufman,
Appreciate the feedback. The pastebin is one example of about 1000+ iterations literally of changes. So I'm finally reaching out :). I haven't tested the socket attribute in record-route change, I will try this now. As for the angle brackets I've tried with and without, etc (already) to no effect. The SDP unknown media type seems to be a Poly thing, so I *want* to rule this out as its not in my other SDP's and still receive 400 bad request.
One more iteration here we go... please feel free to let me know if you have any other thoughts on the matter :).
Thanks!
- Brandon
On Thu, Dec 29, 2022 at 8:08 AM Alex Balashov abalashov@evaristesys.com wrote:
Yeah, the grammar says that rr-params are just generic-params, in which case it's not. I didn't see that -- nicely spotted!
I think that may be the basis of the 400 Bad Request. I'd be shocked if it weren't.
The broken clock of "Microsoft SIP" can still be right twice a day.
On Dec 29, 2022, at 10:31 AM, Kaufman bkaufman@bcmone.com wrote:
In your top Record-Route you have:
socket=;
Not sure if that is legal.
Kaufman
-----Original Message----- From: Alex Balashov abalashov@evaristesys.com Sent: Thursday, December 29, 2022 9:02 AM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: [SR-Users] Re: Direct Routing, SIP, INVITE TO TEAMS (400 BAD
REQUEST)
Sorry to hear you're having to interoperate with Teams. It's a unique
form of sadism I wouldn't wish upon anyone.
A few theories:
- Microsoft doesn't like the "bare" Contact header-value here:
Contact: sip:+MY_FROM_PHONE_NUMBER_HERE@MY_FQDN_WAS_HERE
:5061;transport=tls
Unlike the careted one right above:
P-Asserted-Identity: sip:+MY_FROM_PHONE_NUMBER_HERE@MY_FQDN_WAS_HERE
A bare URI absent other header-params is of course completely legal, but
I'm really trying to get inside the imaginary world of antisocial "Microsoft SIP" here.
- Could it be that antisocial "Microsoft SIP" sends 400 as a way of
objecting to something in the SDP, e.g. where a non-demented SIP stack would send "488 Not Acceptable Here" or "415 Unsupported Media Type"?
I know you've said you tried multiple clients to rule that out, but I
wonder if the thing it's objecting to hasn't been ruled out that way.
- I saw this media line in the SDP:
m=application 41356 <unknown media type>
What's that?
-- Alex
On Dec 29, 2022, at 9:51 AM, Brandon Armstead brandon@cryy.com wrote:
Outbound calls from my SBC into Teams (Polycom -> SBC -> Teams) always
result in a 400 BAD REQUEST.
Example invite below: https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpast ebin.com%2FF1G1Ce59&data=05%7C01%7Cbkaufman%40bcmone.com%7C55672dbf739 a4ff447f008dae9b0c9b2%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C638 079242759152531%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2 luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Cbff6B4gNr8 A9zs89smJ129y8IyNM9%2B3zVkGhlzpa54%3D&reserved=0 I've taken care to make sure numbers are all E.164 format in
From/To/Contact. I've also taken care to make sure that FQDN is used in Contact and Record-Route header.
I've tried many different variations and have followed the SIP
information here:
https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Flear n.microsoft.com%2Fen-us%2Fmicrosoftteams%2Fdirect-routing-protocols-si p&data=05%7C01%7Cbkaufman%40bcmone.com%7C55672dbf739a4ff447f008dae9b0c 9b2%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C638079242759152531%7C Unknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1h aWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=GO26A9FOOoS42yMCWPPGo5PkKo75c kjSJSkjAeYRsU0%3D&reserved=0 I've also tried several different clients (Bria, Polycom CCX 600, Grandstream, etc) to see if maybe it was
something in the SDP or otherwise causing an issue.
SIP Transport is TLS, RTP is SRTP I might also add that OPTION pings are active and Direct Routing
Endpoint is active, so this is successful. I also am able to receive calls FROM teams to my IP phone(s) without issue. It is only when I try and call INTO teams (INVITE -> Microsoft Teams) that I always receive a 400 BAD REQUEST to my INVITE.
Any help is appreciated, thank you!
- Brandon
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