Aastra 9143i Series Administrator's Manual page 421

Sylantro Servers
The ring tone keywords that can display in the "Alert-Info" header for a Sylantro
server are:
When the ring tone keywords appear in an "Alert-Info" header from a Sylantro
server, the keyword is mapped to the ring tone pattern based on the configuration
you set in the Aastra Web UI or the configuration files.
Ring Tone Patterns
In IP Telephony, different ringing patterns have different frequencies and
cadences. Ring cadence is the ringing pattern heard by the called party, before
they pick up the call.
On the IP phones, if you enable priority alerting when using an Asterisk or
Broadworks server, the IP phone uses the following Bellcore-specified tones by
default:
Ring Tone Pattern (Asterisk/Broadworks Servers)
41-001160-03, Rev 00, Releaes 2.4
Ring Tone Keywords
alert-acd (auto call distribution)
alert-community-1
alert-community-2
alert-community-3
alert-community-4
alert-emergency
alert-external
alert-group
alert-internal
alert-priority
Call Criteria
internal calls
external calls
calls with contact list
calls with specific time frames
Configuring Operational Features
Sylantro Server
Bellcore Tones
Bellcore-dr2
Bellcore-dr3
Bellcore-dr4
Bellcore-dr5
Operational Features
5-123