Hi Gary Worth checking if the 4G service is using CGNAT and if the 4G routers require an extended UDP timeout for the voice service.
Also the 4G router could have a SIP ALG running which could well cause issues. Paul On Fri, 12 Jun 2020 at 19:26, Gary Steers <[email protected]> wrote: > Hello, > > Is there anyone on list, or someone who knows someone that could answer > the following question? > > One of my contacts who normally works from home is having major issues > with his broadband not being stable at the moment, so is using 4G as a > backup, but his desk phone will not connect when on 4G (He believes it's on > a Gamma hosted PBX Service but is not sure) > > He has had problems on the following providers > O2 > EE > > Happy to converse off-list. > > Gary > -- Paul Bone Network Consultant PMB Technology
