Version 6.2 447 February 2011
SIP User's Manual 10. Configuration Parameters Reference
Parameter Description
[DisableReminderRing]
Disables the reminder ring, which notifies the FXS user of a call on hold
or a waiting call when the phone is returned to on-hook position.
 [0] = (default) The reminder ring feature is active. In other words, if a
call is on hold or there is a call waiting, and the phone is changed from
offhook to onhook, the phone rings (for a duration defined by the
CHRRTimeout parameter) to "remind" you of the call hold or call
waiting.
 [1] = Disables the reminder ring. If a call is on hold or there is a call
waiting and the phone is changed from offhook to onhook, the call is
released (and the device sends a SIP BYE to the IP).
Note: This parameter is applicable only to FXS interfaces.
[PlayDTMFduringHold]
Enables playing DTMF signals to the Tel side when a call is on hold.
 [0] = Disable (default) - if the call is in Hold (inactive) state, the device
does not play DTMF signals to the Tel if it receives SIP INFO DTMF
messages.
 [1] = Enable - the device stops playing the Held tone (if it was played)
and starts playing DTMF digits according to received SIP INFO
message(s). (The stopped Held tone is not played again.)
10.12.5.6 Call Transfer Parameters
The call transfer parameters are described in the table below.
Table 10-45: Call Transfer Parameters
Parameter Description
Web/EMS: Enable Transfer
[EnableTransfer]
Determines whether call transfer is enabled.
 [0] Disable = Disable the call transfer service.
 [1] Enable = Enable the call transfer service (using
REFER)(default).
If the transfer service is enabled, the user can activate
Transfer using hook-flash signaling. If this service is enabled,
the remote party performs the call transfer.
Notes:
 To use call transfer, the devices at both ends must support
this option.
 To use call transfer, set the parameter EnableHold to 1.
Web: Transfer Prefix
EMS: Logical Prefix For Transferred
Call
[xferPrefix]
Defines the string that is added as a prefix to the
transferred/forwarded called number when the REFER/3xx
message is received.
Notes:
 The number manipulation rules apply to the user part of the
Refer-To and/or Contact URI before it is sent in the INVITE
message.
 This parameter can be used to apply different manipulation
rules to differentiate transferred/forwarded number from the
originally dialed number.
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