V.120 Configuration Commands
DIVA T/A ISDN Modem Reference Guide ◆ Page 43
AT!E5 =n V.120 N200 (Maximum Retry Count). Applicable to the multiframe mode only. N200
(Maximum Retry Count) is a system parameter which identifies the maximum number
of retransmissions of a frame due to T200 expiring. When the maximum number of
retransmissions is reached, the recover y process is star ted which may caus e call
disconnection.
Range: 1 to 10.
Default: 3.
AT!E6 =n V.120 T203 (Link Integrity Timer). Applicable to the multiframe mode only. T203 (Link
Integrity Timer) is the maximum time allowed without frames (including data and
control) being exchanged. Its purpose is to verify that the remote device is still online
and operational. When the Link Integrity Timer expires, recovery procedures are started
which may cause the disconnection of the current call.
The unit of measurement is seconds.
Range: 1 to 255.
Default: 30.
The value specified for T200 (Retransmission Timer) (see “AT!E4=n” on page42) must
be less than the value specified for T203 (Link Integrity Timer). Otherwise, the default
values are used.
AT!E7 =n V.120 Idle Timer. Idle Timer refers to the maximum time without the exchange of data
frames between the local and the remote devices and before the automatic termination
of the connection. Its purpose is to reduce communications costs while data is not
being transferred for a period of time (operates in both the multiframe and
unacknowledgement modes). When Idle Timer expires, this immediately initiates the
disconnection of calls. Setting a zero value disables Idle Timer.
The unit of measurement is minutes.
Range: 0 to 10000.
Default: 1440 (24 hours).