I can help you to default the system with ease, but always ask for a token sum for the info as it is a complete back door way into the system which is little known. Private Message me for details.
Are you accessing programming for the programming extension? Usually 20, but can be moved to any extension.
The serial lead used an RJ11 'handset cord' type plug (4P4C, a standard RJ11 being 6P4C). It has no components.
Pinouts:
RJ11 | DB9 |
Pin 1 | Pin 5 (Common) |
Pin 2 | Not Connected |
Pin 3 | Pin 3 (TX Data) |
Pin 4 | Pin 2 (RX Data ) |