Version 5.8 407 October 2009
SIP User's Manual 6. Configuration Parameters Reference
Parameter Description
Web/EMS: Waiting For Dial
Tone
[IsWaitForDialTone]
Determines whether the device waits for a dial tone before dialing the
phone number for IP-to-Tel (FXO) calls.
[0] No = Don't wait for dial tone.
[1] Yes = Wait for dial tone (default).
When one-stage dialing and this parameter are enabled, the device
dials the phone number (to the PSTN/PBX line) only after it detects a
dial tone.
If this parameter is disabled, the device immediately dials the phone
number after seizing the PSTN/PBX line without 'listening' for a dial
tone.
Notes:
The correct dial tone parameters should be configured in the Call
Progress Tones file.
The device may take 1 to 3 seconds to detect a dial tone (according
to the dial tone configuration in the Call Progress Tones file). If the
dial tone is not detected within 6 seconds, the device releases the
call and sends a SIP 500 "Server Internal Error” response.
This parameter is applicable only to FXO interfaces.
Web: Time to Wait before
Dialing [msec]
EMS: Time Before Dial
[WaitForDialTime]
Determines the delay before the device starts dialing on the FXO line
in the following scenarios:
The delay between the time the line is seized and dialing begins
during the establishment of an IP-to-Tel call.
Note: Applicable only for one-stage dialing, when the parameter
IsWaitForDialTone is disabled.
The delay between detection of a Wink and the start of dialing
during the establishment of an IP-to-Tel call (for DID lines,
EnableDIDWink is set to 1).
For call transfer - the delay after hook-flash is generated and dialing
begins.
The valid range (in milliseconds) is 0 to 20,000 (i.e., 20 seconds). The
default value is 1,000 (i.e., 1 second).
Note: This parameter is applicable only to FXO interfaces.
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