gtps4m3tSystem Generation

SKLNG

One SKLNG macro should be coded for each remote SLN attached to a 3705/EP or 3745/PEP; and one should be coded for each 3270 local terminal.

The SKLNG macro is used to specify information required to initialize the SCK. For all line types it defines the symbolic line number and the physical paths through which the line may be attached to the system. Other parameters should be coded depending on the line type.

Format




Notes:

  1. One parameter (BST00 thru BST63) is coded for each station on the line.

LNSY=x
The hexadecimal symbolic line number. The SCK macros should be coded in line number sequence, and this parameter will be used for sequence checking. Symbolic line numbers 0 and 1 should never be coded, because they are reserved for the RO and PRC. The first non-CRAS line number (for example, SLC, BSC, etc.) must be equal to that specified in the MINLS parameter of the SIP LINES macro. The symbolic line number is used to determine the line type by reference to the SIP output. If the user is in any doubt as to which line numbers represent which line types, he should refer to a listing of SYSETK which defines line number ranges for each line type.

For local 3270, each 3277 or 3284/3286 terminal is represented by a symbolic line number. These line numbers must be consecutive and therefore must be specified by consecutive SKLNG macros.

PATH1
Specifies the first or only physical path through which the line is attached to the system. For local 3270 lines, only one path can be defined.

a
One to three hex digits defining the subchannel address of the path.

b
A decimal symbolic control unit number to which the line a, is attached. The control unit type is determined from the control unit number by reference to the SIP output. If the user has any doubt as to which control unit numbers represent which control unit types he should refer to a listing of SYSETK which defines control unit number ranges for EP control units. This parameter should not be coded for local 3270s.

c
Code L

d
Indicates the switching status for each path.

M
Manually switchable (requiring operator command).

A
Automatically switchable (e.g., TPF automatically activates an alternate path or subchannel when the line error threshold is exceeded). Default is M.

e
Indicates the type of path (must be P for local 3270's)

P
Prime path (active subchannel for this line).

A
Alternate path (back up or alternate subchannel). Default is A. If only one path is specified it must be the prime path.

PATH2
These parameters specify up to three more physical paths.

PATH3
They have the same format as the PATH1 parameter.

PATH4
The number of paths specified must not exceed the value defined by the NPATH parameter of the SIP NETWK macro.

SL=1|n
For a BSC line: this parameter defines the number of messages that will be sent before line turnaround occurs and messages will be received.

BTYPE
For a BSC line: this parameter defines the type of line and station.

BSPP
Line is a point to point line.

BSMP
Line is a multipoint line.

PRIM
Station is the primary station. (TPF wins when contention occurs in bidding for the line). This parameter is only valid for BSC point to point lines.

SECD
Station is the secondary station (TPF yields to the primary station when contention occurs). This parameter is only valid for BSC point to point lines.

MAST
Defines type of station for a multipoint line. MAST is the only valid parameter. (TPF is responsible for polling the line.) This parameter is only valid for BSC multipoint lines.

YBLK
Line uses blocked message transmission.

NBLK
Line does not have blocking.

BCODE
For a BSC line: this parameter defines type of code used on line.

EBCDIC
Line uses EBCDIC codes.

ASCII
Line uses ASCII codes.

YTRAN
Line has data transparency. This parameter is valid only if EBCDIC is specified, since TPF only supports USASCII in nontransparent mode.

NTRAN
Line does not have data transparency. This parameter is valid only if EBCDIC is specified, since TPF only supports USASCII in nontransparent mode.

YRCPL
Line sends and receives RCPL as a message header. This parameters is valid only if EBCDIC is specified. YRCPL is valid only if YTRAN is also specified since transparency is required to transmit binary data in the RCPL.

NRCPL
Line does not use RCPLs. This parameters is valid only if EBCDIC is specified.

Default values depend upon the type of BSC line. If the line is a point to point line (BTYPE=BSPP), then the defaults are EBCDIC, YTRAN, YRCPL. If the line is a multipoint line (BTYPE=BSMP), then the defaults are EBCDIC, NTRAN, NRCPL.

BSTOV=n
For multipoint BSC lines: this parameter defines the time-out value in seconds.

For Master stations, this value is the slow poll interval. For tributary stations, this value is the time-out value. If no poll is received and time out value elapses, then messages on the output queue are returned to originator.

The value can be from 0 to 255. If the station is a tributary station (BTYPE=(BSMP,TRIB)), then a value of 0 can not be specified. The default value depends upon the type of station. If the station is a master (BTYPE=(BSMP,MAST)), then the default value is 15. If the station is a tributary (BTYPE=(BSMP,TRIB)), then the default is 5.

BST00...
For BSC line: these parameters define entries in the TITB table for the line. One parameter (BST00 thru BST63) is coded for each station on the line. The numerical part of the BSTnn parameter is the station number and relates to the STANO parameter in the BSNCT SIP macro.

polch
This subparameter defines the station poll characters.

selch
This subparameter defines the station select characters.

stanm
This subparameter defines the station name.

For a point to point BSC line, only BST00 is valid. The polch and selch parameters have no meaning and should not be specified. BST00 should be specified when station name message routing is going to be used on a point to point line.

For a tributary station on a multipoint line, only BST00 is valid.

For a master station on a multipoint line, all BST parameters are valid. The BST parameters should have consecutive numbers starting at 00.

The polch and selch subparameters are used to generate pointers to entries in the BSAT table. The polch and sel characters must match an entry in the BSAT table.

The BST parameter numbers are used to create pointers to entries in the SNCT table (generated by SIP). Each BST parameter generates a TITB entry. The TITB entry points to the entry in the SNCT table which has a matching line and station number. Note, the BST parameters specified here are numbered in decimal and the station numbers specified in SIP (BSNCT macro, STANO parameter) are numbered in hexadecimal.

Examples

None.

References

None.