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Re: [Linphone-users] Grandstream GDS3710

From: Chris Jackson
Subject: Re: [Linphone-users] Grandstream GDS3710
Date: Wed, 10 Nov 2021 12:25:13 +1300

Thanks for the response.

Yes, I know what the response means. Apologies for not stating this, but that 
is what I meant earlier when I said that without seeing the packets it’s 
unclear what is actually wrong - the server reports that the request is invalid 
(malformed), but that in itself doesn’t help without seeing the packet to try 
and understand WHAT part it has a problem with. I know that it works with other 
SIP servers (such as FreeSwitch) so the question is how to get it to work with 
LinPhone server.


> On 10/11/2021, at 12:19 PM, Trent Creekmore <> wrote:
> Have you looked up the SIP response code for 400?
> "The request could not be understood due to malformed syntax."
> On 11/9/21 4:59 PM, Chris Jackson wrote:
>> Hi,
>> I was wondering if anyone has the Grandstream GDR3710 SIP phone/camera 
>> working with LinPhones SIP cloud? I’ve managed to get it working with a 
>> local server running FreeSwitch to connect to the LinPhone apps, but once I 
>> use the LinPhone SIP switch it fails to connect. Unfortunately the debug 
>> output from the GDS3710 is not especially useful - it shows a 400 response 
>> is returned from the server, but as I can’t seem to get it to output the 
>> request or response packets it’s unclear what is actually wrong.
>> The GDS3710 can only support numerical extensions so I’ve used an account 
>> like and this works for calling between phones. I 
>> should also add that I can connect TO the GDS3710 from another client (eg 
>> the LinPhone app on an iPhone) and get voice and video, but I can’t initiate 
>> the call from the GDS3710.
>> If someone has this running I’d appreciate some pointers on how this was set 
>> up.
>> Thanks
>> Chris
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