Aastra SIP 53I Administrator's Manual page 254

IP Phone Administrator Guide
Operational Features
Call Waiting Tone
You can also enable or disable the playing of a short "Call Waiting Tone" when
there is an incoming call on your phone. This feature is enabled by default. If you
have Call Waiting enabled, and a call comes into the line for which you are on an
active call, a tone is audible to notify you of that incoming call. The tone is also
audible to the caller to indicate to that caller you are currently on another call.
A User or Administrator can configure this feature. An Administrator can
configure this feature using the configuration files or the Aastra Web UI.
Configuring Call Waiting/Call Waiting Tone
Use the following procedures to configure the Call Waiting/Call Waiting Tone
features on the IP phone.
Configuration Files
For specific parameters you can set in the configuration files, see Appendix A, the section,
Settings" on page A-101.
5-44
Note: The Call Waiting Tone feature works only if Call Waiting is
enabled.
"Call Waiting
41-001160-00, Release 2.1, Rev 04