BusinessPhone Communication Platform 4.0
Fault Tracing ASB 150 02 > Procedures

## Check on telephone

The digital system telephones have a built-in self test facility that can be initiated by pressing three keys simultaneously for three seconds. Self test can only be initiated in idle state. Initiate self test and verify that the telephone functions properly. If not replace the telephone.

Telephone type | Keys for initiation of self test | Result of self test ok
DBC 199 | R-button, * and 4 | LED glows steadily
DBC 201 | C,*,4 for one second | All LEDs light up
DBC 202 | C,*,4 for one second | ’Self test ok’ on display
DBC 203 | C,*,4 for one second | ’Self test ok’ on display
DBC 211 | C,*,4 for one second | All LEDs light up
DBC 212 | C,*,4 for one second | ’Self test ok’ on display
DBC 213 | C,*,4 for one second | ’Self test ok’ on display
DBC 214 | C,*,4 for one second | ’Self test ok’ on display
DBC 601 | Transfer, * and 4 | No LEDs shall flash
DBC 632 | Transfer, * and 4 | ’Self test ok’ on display
DBC 662 | Transfer, * and 4 | ’Self test ok’ on display
DBC 663 | Bypass, * and 4 | ’Self test ok’ on display

If there is a voice communication problem also check the connection of the telephone handset to the telephone and test using another handset if the original handset is suspected to be faulty.

Revision: F © Ericsson Enterprise 2003