Grandstream Networks HT503 User Manual page 56

Proxy-Require
Use NAT IP
Use SIP User-Agent
Header
Distinctive Ring Tone
Disable Call Waiting
Disable Call Waiting
Caller ID
Disable Call Waiting
SIP Extension to notify SIP server that the unit is behind the NAT/Firewall.
NAT IP address used in SIP/SDP message. Default is blank
Used to replace SIP User-Agent Header (No Default)
Custom Ring Tone 1 to 3 with associate Caller ID: when selected, if Caller
ID is configured, then the device will ONLY uses this ring tone when the
incoming call is from the Caller ID. System Ring Tone is used for all other
calls. When selected but no Caller ID is configured, the selected ring tone
will be used for all incoming calls. Distinctive ring tones can be configured
not only for matching whole number, but also for matching prefixes. In this
case symbol * (star) will be used.
If server supports Alert-Info header and standard ring tone set (Bellcore) or
distinctive ring tone 1-10 is specified, then the ring tone in the Alert-Info
header from server will be used.
For example:
If configured as *617, Ring Tone 1 will be used in case of call arrived from
Massachusetts. Any other incoming call will ring using cadence defined in
parameter System Ring Cadence located under Advanced Settings
Configuration page.
Default is No. If set to Yes, call waiting indication information will not be
provided.
Default is No. This is to disable the caller ID when a call waiting information
arrives.
Default is No. This is to disable the stutter Call Waiting Tone when a Call
HT503 User Manual
P a g e | 55