Replacement of key pad unit
Fault is probably caused by an internal fault in the phone module. With this type of fault, the phone module must be replaced.
CAUTION:
A new phone module is supplied without software. The new phone module must be programmed before it will work.
Additional information:
- To program and access/replace the phone module, see Telephone module/-control module (PHM), changing .
Continue when fault has been rectified.
- Continue
Refer to Verification