Hi Everybody and new to the forum,
My problem is as followed: I am trying to determine what the problem is with a PBX we acquired after taken over the IT services from a company.
The phone and sip information was working perfectly without any problems but one day it stopped working immediately without any notice. We already confirmed with the ISP that everything regarding financial is in order. On the Grandstream UCM6202 the SIP Trunk is currently indicating a Rejected status. This happened one day after the other. We did not change any information or configuration due to not having this prior to the problem.
Second i realized i can’t update or upgrade the firmware due to not seeing the option within the maintenance window. i don’t see upgrade option nor am i seeing the backup option. i am currently logged in as Administrator with an Administrator account.
I have tested the same SIP information and credentials on a GS UCM6102 without any specific or special settings being set and it worked immediately.