AudioCodes Mediant 1000B User Manual page 1204

Parameter
configure voip > gateway
manipulation settings > prefix-2-
ext-line
[AddPrefix2ExtLine]
Hook Flash Parameters
Flash Keys Sequence Style
configure voip > gateway dtmf-
supp-service supp-service-
settings > flash-key-seq-style
[FlashKeysSequenceStyle]
User's Manual

The parameter is applicable only to FXS interfaces.
Enables the device to add the prefix string for accessing an
external line (configured by the Prefix2ExtLine parameter) to the
dialed (called) number as the prefix, which is sent to the IP
destination (for Tel-to-IP calls).

[0] = (Default) Disabled - the device does not add the prefix
string for accessing the external line to the collected and sent
dialed number. For example, if you configure the
Prefix2ExtLine parameter to "9" and the FXS endpoint makes a
call to destination number "123", the device collects and sends
only the destination number digits "123" (i.e., without the prefix
string) to the IP destination.

[1] = Enables the device to add the prefix string for accessing
the external line to the dialed number as the prefix, which is
sent to the IP destination. For example, if you configure the
Prefix2ExtLine parameter to "9" and the FXS endpoint makes a
call to destination number "123", the device collects and sends
all the dialed digits, including the prefix string "9", as "9123" to
the IP destination.

[2] = Same as option [1], but in addition, the device uses the
prefix string for accessing the external line as the first digit in
configured patterns of Digit Maps and/or Dial Plans. This option
is useful in that it allows you to configure separate patterns for
internal and external dialing. For example, if you configure the
Prefix2ExtLine parameter to "9" and configure digit map
patterns "2xxx|92xxxxxxx", the device considers dialed
numbers between 2000 and 2999 (2xxx) as internal extensions
(i.e., when "9" is not dialed for an external line), and if the first
dialed digit (prefix) is "9" (for accessing the external line),
considers dialed numbers between 20000000 and 29999999
(92xxxxxxx) as external numbers.
Note:

The parameter is applicable only to FXS interfaces.

The parameter is applicable only to Tel-to-IP calls.
Determines the hook-flash key sequence for FXS interfaces.

[0] Flash hook = (Default) Only the phone's flash button is used
for the following scenarios:

During an existing call, if the user presses the flash button,
the call is put on hold; a dial tone is heard and the user is
able to initiate a second call. Once the second call is
established, on-hooking transfers the first (held) call to the
second call.

During an existing call, if a call comes in (call waiting),
pressing the flash button places the active call on hold and
answers the waiting call; pressing flash again toggles
between these two calls.

[1] Sequence 1 = Sequence of flash button with digit:

Flash + 1: holds a call or toggles between two existing
calls

Flash + 2: makes a call transfer.

Flash + 3: makes a three-way conference call (if the Three-
Way Conference feature is enabled, i.e., the parameter
1204
Mediant 1000B Gateway & E-SBC
Description
Document #: LTRT-27055