BusinessPhone Communication Platform 4.0
Commands > Commands 2000...2999

## 2649
Test tone

The tone is used for line testing purposes to check condition of speech (B-) channels in CAS links. The test call is initiated from PSTN by direct dialling in, either decadic or MFC. The dialled digits are related to a specific ‘extension number’ which internally starts the test call sequence. The test sequence is predefined:

- ring tone is sent during predefined time and thereafter speech connection is established to PSTN.
- test tone with predefined frequency and cadencies is sent to the PSTN.
- the connection is released from ASB15002.

Minimum required authority level from telephone: No

Accessible via BMS: Yes

Revision: A © Ericsson Enterprise 2003