Specifying transmitters and receivers

An installation can specify a maximum of 16 devices (8 transmitters and 8 receivers) on a line. Each transmission, however, can consist of no more than 8 data sets (limited to a maximum of 7 jobs and 7 SYSOUT). The number of transmitters active on a line must match the number of receivers on the other end of the line; JES2 will drain excessive (unmatched) transmitters and receivers.

You can specify the number of transmitters and receivers on NJE lines globally through the following NJEDEF parameters, which apply to each line generated by the NJEDEF LINENUM parameter:

JRNUM - Number of Job Receivers for each NJE line
JTNUM - Number of Job Transmitters for each NJE line
SRNUM - Number of SYSOUT Receivers for each NJE line
STNUM - Number of SYSOUT Transmitters for each NJE line.

You can specify the value DEFAULT on the corresponding LINE(nnnnn) statement to take the value specified on the NJEDEF statement. However, if the use of DEFAULT results in more than eight transmitters (job and SYSOUT combined) or more than eight receivers (job and SYSOUT combined), JES2 reduces the defaulted value so that the combined number of transmitters and receivers equals 8.

Installations can commit lines to NJE through either the JRNUM=, JTNUM=, SRNUM=, and STNUM= parameters on the LINE(nnnn) statement, or through the L(nnnn).ST(m) or L(nnnn).JT(m) statements, or using the $T LINE command. (These lines do not count toward the limit specified on the LINENUM= parameter of the NJEDEF initialization statement.) In addition to committing these lines to specific devices, IBM® suggests that each installation dedicate all lines for an NJE facility.

To dedicate these lines, specify them on the LINE= parameter on either the APPL(avvvvvvv) initialization statement (for SNA networks only), the SOCKET(xxxxxxxx) statement (for TCP/IP networks), or the NODE(nnnn) initialization statement (for SNA, BSC, and TCP/IP networks). If you specify different values for the LINE= parameter on these statements, JES2 uses the value on the APPL(avvvvvvv) statement (for SNA) or the SOCKET(xxxxxxxx) statement (for TCP/IP).

NJE transmitters can also be specified explicitly through the following statements:

L(nnnn).JT(m) - Job transmitters for line nnnn - parameters WS=(LIMIT= can be used for selection criteria.
L(nnnn).ST(m) - SYSOUT transmitters for line nnnn - parameters WS=, LIMIT=, and PLIM= can be used for selection criteria.

If this statement is specified for a line, then a full set of transmitters and receivers will be assigned according to the NJEDEF or LINE xxNUM parameters, where xx indicates SYSOUT transmitter (ST), SYSOUT receiver (SR), job transmitter (JT), or job receiver (JR). If the number (m) is higher than the number specified by the corresponding JTNUM or STNUM parameter, the specific transmitter specified through (m) is not created.