User's Manual
FIRMWARE VERSION 1.0.0.2     GXW42XX USER MANUAL      Page 40 of 52 
Proxy Require 
SIP Extension to notify SIP server that the unit is behind the NAT/Firewall. 
Use NAT IP 
NAT IP address used in SIP/SDP message. Default is blank. 
Distinctive Ring Tone 
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. 
Disable Call Waiting  Default is No. If set to YES  Call Waiting indication information will not be provided to 
analog phone connected to this FXS port. 
Disable Call Waiting 
Caller ID 
Default is No. If set to YES Call Waiting caller ID will not be provided to analog phone 
connected to this FXS port. 
Disable Call Waiting 
Tone 
Default is No. This is to disable the stutter Call Waiting Tone when a Call Waiting call 
arrives. The CWCID will still be displayed. 
Disable Receiver 
Offhook Tone 
Default is No. If YES, ROH tone will not be played after off hook for 60 seconds. 
Disable Reminder 
Ring for On-Hold Call 
Default is No. This is to disable the Reminder Ring that is played when a call is waiting 
on hold and the analog phone goes on-hook. 
Disable Visual MWI 
Visual message indicator is a special on-hook caller ID type message that enables and 
disables the message waiting light on certain phones. GXW42XX has this feature 
enabled by default. However, certain phones (rare) that do not support it may mistakenly 
treat this CID signal as an incoming call. A configuration option is needed to turn on MWI 
in this case. 
Visual MWI Type 
This is the type of signal sent to the analog phone to make it turn the lamp ON upon 
receiving a Voice mail. Check the phone’s manual to find out what signal is supported, 
FSK (default) or Neon. 
Note: This is only supported in model GXW4224 ver 4.A or newer. 










