Westermo MR Series - Manual (Page 231)

231 6622-3201
Web Interface and Command Line Reference Guide www.westermo.com
SAPs:
This parameter contains a list of SAP values which correspond to the station addresses.
DSAPs(blank=default):
This is the Destination SAP value, if left blank the SAP value above is used.
Polling Response(msec):
The poll time in msec (if the unit is the master in an unbalanced link).
Send Null XID:
When this parameter is set to “On” a null XID SSP message will be sent when the unit has just
received or sent a REACH ACK SSP message.
XID Data:
This parameter is a hex string to define binary data and defines an XID SSP message that would
be sent in response to a XIDFRAME SSP message being received.
Tx turn around time(msec):
This parameter specifies the time in milliseconds between receiving a frame from an outstation
and transmission back to the same station. If this parameter is set to “0” this is disabled and the
Westermo can respond immediately. The minimum non-zero value is 10ms.
DTE/DCE mode:
When this parameter is set to “DTE”, the unit will behave as Data Terminal Equipment with
respect to the ISDN network. This is the default value and should not be changed for normal
operation across the ISDN network. If your application involves using two units back-to-back,
one of the units should have the DTE/DCE mode value set to “DCE” so that it acts as Data
Communications Equipment.
RR timer (ms):
This is a standard LAPB/LAPD “Receiver Ready” timer. The default value is 10,000ms (10 sec-
onds) and it should not normally be necessary to change this.
Inactivity timer (s):
This parameter may be used to specify the length of time (in seconds) before the link is discon-
nected if there has been no activity. If this parameter is zero or not specified, then the inactivity
timer is disabled. It is useful to set this to a short period of time (say 120 seconds) when an
LAPB instance is being used over ISDN. This timer can be used as a backup hang-up timer thus
saving ISDN call charges.
When LAPB is being used on a synchronous port, this parameter should normally be set to 0.
T1 timer (ms):
This is a standard LAPB timer. The default value is 1000 milliseconds (1 second) and under nor-
mal circumstances, it should not be necessary to change it.
T200 timer (ms):
This is the standard LAPB re-transmit timer. The default value is 1000 milliseconds (1 second)
and under normal circumstances, it should not be necessary to change it.
N400 counter:
This is the standard LAPB retry counter. The default value is 3 and it should not normally be
necessary to change this.
Window size:
This parameter is used to set the X.25 window size. The value range is from 1 to 7 with the
default being 7.