Version 7.2 1175 Mediant 800B Gateway & E-SBC
User's Manual 72. Configuration Parameters Reference
Parameter Description
SPRT Transport Ch.3 Max
Payload Size
configure voip > media fax-
modem > SPRT-transport-
channel3-max-payload-size
[V1501SPRTTransportChannel3
MaxPayloadSize]
Defines the maximum payload size for V.150.1 SPRT Transport
Channel 3.
The range is 140 to 256. The default is 140.
72.11.2 DTMF and Hook-Flash Parameters
The DTMF and hook-flash parameters are described in the table below.
Table 72-41: DTMF and Hook-Flash Parameters
Parameter Description
Hook-Flash Parameters
Hook-Flash Code
configure voip > gateway dtmf-supp-
service supp-service-settings > hook-
flash-code
[HookFlashCode]
Analog interfaces: Defines the digit pattern that when
received from the Tel side, indicates a Hook Flash event.
Digital interfaces: Defines 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 has occurred and sends a SIP INFO message if
the HookFlashOption parameter is set to 1, 5, 6, or 7
(indicating a 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: The parameter can also be configured in a Tel Profile.
Hook-Flash Option
configure voip > gateway dtmf-supp-
service dtmf-and-dialing > hook-flash-
option
[HookFlashOption]
Defines the hook-flash transport type (i.e., method by which
hook-flash is sent and received). For digital interfaces: The
feature is applicable only if the HookFlashCode parameter is
configured.
 [0] Not Supported = (Default) Hook-Flash indication is
not sent.
 [1] INFO = Sends proprietary INFO message (Broadsoft)
with Hook-Flash indication. The device sends the INFO
message as follows:
Content-Type: application/broadsoft; version=1.0
Content-Length: 17
event flashhook
 [4] RFC 2833 = This option is currently not supported.
 [5] INFO (Lucent) = Sends proprietary SIP INFO
message with Hook-Flash indication. The device sends
the INFO message as follows:
Content-Type: application/hook-flash
Content-Length: 11
signal=hf
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