AudioCodes Mediant 800 MSBG - DTMF and Hook-Flash Parameters

Version 6.2 745 February 2011
SIP User's Manual 12. Configuration Parameters Reference
12.12.2 DTMF and Hook-Flash Parameters
The DTMF and hook-flash parameters are described in the table below.
Table 12-35: DTMF and Hook-Flash Parameters
Parameter Description
Hook-Flash Parameters
Web/EMS: Hook-Flash Code
[HookFlashCode]
For analog interfaces: Defines the digit pattern that when
received from the Tel side, indicates a Hook Flash event. For
digital interfaces: Determines the digit pattern used by the
PBX to indicate a Hook Flash event. When this pattern is
detected from the Tel side, the device responds as if a Hook
Flash event occurred and sends a SIP INFO message if the
parameter HookFlashOption is set to 1, indicating Hook Flash.
If configured and a Hook Flash indication is received from the
IP side, the device generates this pattern to the Tel side.
The valid range is a 25-character string. The default is a null
string.
Note: This parameter can also be configured per Tel Profile,
using the TelProfile parameter.
Web/EMS: Hook-Flash Option
[HookFlashOption]
Determines the hook-flash transport type (i.e., method by
which hook-flash is sent and received).
 [0] Not Supported = Hook-Flash indication isn't sent
(default).
 [1] INFO = Sends proprietary INFO message with Hook-
Flash indication.
 [4] RFC 2833
 [5] INFO (Lucent) = Sends proprietary SIP INFO message
with Hook-Flash indication.
 [6] INFO (NetCentrex) = Sends proprietary SIP INFO
message with Hook-Flash indication. The device sends the
INFO message as follows:
Content-Type: application/dtmf-relay
Signal=16
Where 16 is the DTMF code for hook flash
 [7] INFO (HUAWAEI) = Sends a SIP INFO message with
Hook-Flash indication. The device sends the INFO
message as follows:
Content-Length: 17
Content-Type: application/sscc
event=flashhook
Notes:
 The device can interwork DTMF HookFlashCode to SIP
INFO messages with Hook Flash indication (for digital
interfaces)
 FXO interfaces support only the receipt of RFC 2833 Hook-
Flash signals and INFO [1] type.
 FXS interfaces send Hook-Flash signals only if the
parameter EnableHold is set to 0.