CHAPTER72 Configuration Parameters Reference
Mediant 800 Gateway & E-SBC | User's Manual
Parameter Description
[RingsBeforeCallerID] ■ [2] 2 = After second ring.
'Guard Time Between Calls'
configure voip > gateway
analog fxo-setting >
guard-time-btwn-calls
[GuardTimeBetweenCalls]
Defines the time interval (in seconds) after a call has
ended and a new call can be accepted for IP-to-Tel
(FXO) calls.
The valid range is 0 to 10. The default is 1.
Note: Occasionally, after a call ends and on-hook is
applied, a delay is required before placing a new call
(and performing off-hook). This is necessary to prevent
incorrect hook-flash detection or other glare phenomena.
'FXO Double Answer'
configure voip > gateway
analog fxo-setting > fxo-
dbl-ans
[EnableFXODoubleAnswer]
Global parameter enabling the FXO Double Answer
feature, which rejects (disconnects) incoming Tel-to-IP
collect calls and signals (informs) this call denial to the
PSTN..
You can also configure the feature per specific calls,
using Tel Profiles (TelProfile_
EnableFXODoubleAnswer). For a detailed description of
the parameter and for configuring the feature in the Tel
Profiles table, see Configuring Tel Profiles.
Note: If the feature is configured for a specific Tel
Profile, the settings of the global parameter is ignored for
calls associated with the Tel Profile.
'FXO Ring Timeout'
configure voip > gateway
analog fxo-setting > fxo-
ring-timeout
[FXORingTimeout]
Defines the delay (in msec) before the device generates
a SIP INVITE (call) to the IP side upon detection of a
RING_START event from the Tel (FXO) side. This
occurs instead of waiting for a RING_END event.
This feature is useful for telephony services that employ
constant ringing (i.e., no RING_END is sent). For
example, Ringdown circuit is a service that sends a
constant ringing current over the line, instead of
cadence-based 2 second on, 4 second off. For example,
when a telephone goes off-hook, a phone at the other
end instantly rings.
If a RING_END event is received before the timeout
expires, the device does not initiate a call and ignores
the detected ring. The device ignores RING_END
events detected after the timeout expires.
The valid value range is 0 to 50 (msec), in steps of 100-
msec. For example, a value of 50 represents 5 sec. The
default value is 0 (i.e., standard ring operation - the FXO
interface sends an INVITE upon receipt of the RING_
END event).
Note: The parameter can be configured for a Tel Profile.
IP Connectivity Parameters
The IP connectivity parameters are described in the table below.
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