NET/MASTER Management Services (MS) System Management Guide

X.25 Connection Guidelines
Supporting Remote Operations
9–18 105744 Tandem Computers Incorporated
X.25 Unit Definition
Guidelines
X.25 unit definitions configure use of a virtual circuit unit. Table 9-7 provides
guidelines for configuring X.25 unit definitions.
Table 9-7. X.25 Unit Definition Guidelines
UNIT DEFINE
Operand Definition Guidelines
unit-name Specifies the name of the unit, from 1 to 12 displayable characters; alphabetic
characters are shifted to uppercase.
SESSION Specifies the name of the session to which the unit belongs.
DEVICE Identifies an X.25 subdevice with which INMC exchanges data blocks.
MODE PERMANENT, for a unit used in a permanent virtual circuit;
ACTIVE, for the active unit of a switched virtual circuit;
PASSIVE, for the passive unit of a switched virtual circuit.
CONNECTDELAY For permanent virtual circuits, specifies, in seconds, the delay between call
attempts. To avoid contention when the link is being established, specify a
different connect delay for each end of a unit pair.
For the active unit of a switched virtual circuit, specifies the delay between
attempts to call a passive unit on the other end of the link.
For the passive unit of a switched virtual circuit, specifies the delay between
expected calls from an active unit on the other end of the link.
Specify in seconds as an integer in the range 60-999. The default is 60
seconds.
DTEADDR Specifies the data terminal equipment (DTE) called address of the passive unit
in a switched virtual circuit. If the DTE address differs from the value of the
DESTADDR SCF attribute, the address overrides the value of the SCF
attribute. If the subdevices have port numbers associated with them, append
the port number to the end of the DESTADDR when you specify the
DTEADDR.
IOSIZE Specifies the largest number of bytes that are either sent to or read from the
subdevice specified by the DEVICE operand. Specify IOSIZE as an integer in
the range 128-4096. For maximum efficiency, set the IOSIZE to a value
greater than that of the INMC packet and an associated header. The
recommended IOSIZE for X.25 units is 1024. The default value is 256 bytes.
COMMENT An optional text string of up to 50 displayable characters.