We have several VG204 devices configured using MGCP connected to fax machines. We are having a problem when the VG boxes are busy with a fax and a second incoming fax machine does not get a BUSY from the VG box. It rings until deciding that there was no answer. As a result we are missing a lot of faxes.
Can anyone help with the CLI necessary so that the VG box will notify the incoming fax that it is BUSY instead of just ringing. Any help in this matter would be greatly appreciated. Thanks
Solved! Go to Solution.
The difference is how to signal on-hook and off-hook. Ground start can provide busy detection which isn't present with loop start. see this link for more details.