try to change the interface devices that are used by gsopen, many times modem (dongle) vendor are messing with them. Rerea the documentation, and check out how to change those devices, eg, in various permutations.
This is the only thing that comes to my mind. If this do not work, you will need to debug it deeply.
-giovanni

On 20 September 2017 at 11:47, Jeff Chua <jeff.chua.linux@gmail.com> wrote:
On Wed, Dec 28, 2016 at 6:58 PM, Jeff Chua <jeff.chua.linux@gmail.com> wrote:
> Any help is very much appreciated!
>
> Thanks,
> Jeff
>
> On Tue, Dec 27, 2016 at 4:38 PM Jeff Chua <jeff.chua.linux@gmail.com> wrote:
>>
>> On Tue, Dec 27, 2016 at 7:03 AM, Brian West <brian@freeswitch.org> wrote:
>>
>> > Any of those variables with dashes are invalid, you should look those
>> > up,
>>
>> > those are params.
>>
>>
>>
>> Ok, I set all these to false  ...
>>
>>
>>
>> # sip_profiles/internal.xml
>>
>>         <param name="disable-transcoding" value="false"/>
>>
>>         <param name="inbound-late-negotiation" value="false"/>
>>
>>         <param name="inbound-zrtp-passthru" value="false"/>
>>
>>
>>
>> # ./sip_profiles/external.xml
>>
>>         <param name="disable-transcoding" value="false"/>
>>
>>         <param name="inbound-late-negotiation" value="false"/>
>>
>>         <param name="inbound-zrtp-passthru" value="false"/>
>>
>>
>>
>> Still no sound from GSM to SIP.
>>
>>
>>
>> What else can I try?

I still can't fix the one-way gamopen audio issue on freeswitch. It's
running the latest freeswitch git version.

I'm using Huaweil USB modem. The modem works fine in with
Asterisk/chan_dongle (audio works both ways).

SIP phone calling from wifi -> to freeswitch -> to another SIP phone
on the same wfil -> audio works both ways.

SIP phone calling from wifl -> to freeswitch -> to gsmopen -> Mobile
Phone ... -> one-way audio only from SIP phone. GSM to SIP no audio.



--

Sincerely,

Giovanni Maruzzelli
OpenTelecom.IT

cell: +39 347 266 56 18