Epson Multi-mode Data Controller MFJ-1278B - Manual (Page 197)

MFJ-1278B MULTI-MODE OPERATIONAL COMMANDS
CHECK n Mode: Packet Default: 30
Parameters:
n 0-250, specifying the check time in 10 second intervals. A value of 0 disables
this feature.
This command sets a connection timeout. If a link connection exists between the MFJ-1278B
and another station, and the other station "disappears," your MFJ-1278B could remain in the
connected state indefinitely, refusing connections from other stations. This might happen if
propagation changes unexpectedly or an intermediate digipeater station is turned off. In
order to prevent this sort of lockup, the MFJ-1278B will try to clean up the link if the
specified time elapses without any packets being heard from the other TNC. The operation
of this feature depends on the setting of AX25L2V2.
If AX25L2V2 is ON, the MFJ-1278B will send a "check packet" to verify the presence of the
other station if no packets have been heard from it for n*10 seconds. This frame contains no
information, but is interpreted by the receiving station's TNC as an inquiry as to whether it is
still connected. If the receiving TNC is still connected, it sends an appropriate response
packet. If the TNC initiating the inquiry does not hear a response after RETRY+1 attempts,
it commences a disconnect sequence, as if the DISCONNE command had been given.
If AX25L2V2 is OFF and the other station has not been heard for n*10 seconds, the MFJ-
1278B will not attempt an inquiry, but will send a disconnect packet, just as if you had typed
the command DISCONNE.
CHECKV1 ON/OFF
Mode: Packet Default: OFF
The CHECKV1 parameter enables the automatic idle-link- disconnect feature for AX.25
Level 2 Version 1 connections. The idle time before disconnecting will be equivalent to the
AX.25 CHECK parameter (see CHECK command).
CHObell ON/OFF
Mode: Pactor Default: ON
Parameters:
ON
An ASCII bell character is sent to the terminal when the PACTOR link changes
direction.
OFF
An ASCII bell character is not sent to the terminal when the PACTOR link
changes direction.