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:
>
> 1) 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.
>
> 2) 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.
>
> 3) 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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>
> --
> Alex Balashov | Principal | Evariste Systems LLC
>
> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
> Web: https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.evaristesys.com%2F&data=05%7C01%7Cbkaufman%40bcmone.com%7C55672dbf739a4ff447f008dae9b0c9b2%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C638079242759152531%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=ItYjjYmm0QcD0vuQ4KamCrHtIF7UiukxxAp6zfrEgXQ%3D&reserved=0, https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.csrpswitch.com%2F&data=05%7C01%7Cbkaufman%40bcmone.com%7C55672dbf739a4ff447f008dae9b0c9b2%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C638079242759152531%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=DRWZOre6j7XZQhkCcKUvD%2B5dXH%2B4i3M2S5kz%2FleEJuo%3D&reserved=0
>
> __________________________________________________________
> Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave@lists.kamailio.org
> Important: keep the mailing list in the recipients, do not reply only to the sender!
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--
Alex Balashov | Principal | Evariste Systems LLC
Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
__________________________________________________________
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