Black Box A/S-4 manual System/Line Gen for Batch

Models: A/S-4

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PROTOCOL CONVERTER MODEL A/S-4

12. System/Line Gen for Batch

The following is a VTAM/NCP/JES2 line gen for a 3776 model 3 or 4. For more information on specific parameters, refer to the appropriate IBM manuals.

IBM 3770 SNA Installation Guide - GC30-3064

Component Description for the IBM 3776 and 3777 Communication

Terminals - GA27-3145

VTAM Generation Manuals - MANY

NCP Generation Manuals - MANY

NCP & VTAM Parameters: Most values are defaults

——————- HOST MACRO ——————-

UNITSZ = 384

VTAM’S data buffer size

————— (LINE (GROUP) MACRO ————-

DIAL = NO

No for leased line or yes for dial-up A/S-4 operation

LNCTL = SDLC

For SDLC line

TYPE = NCP

For NCP

(3) CLOCKING = EXT or INT

Modem or A/S-4 supplies clocks

(2) DISCNT = NO or YES

If switched SDLC line should drop if no active LU sessions

DUPLEX = FULL or HALF

Full or half duplex line

INTRPI = 2

 

(*) NEWSYNC = NO

No new sync on modem

(3) NRZI = YES or NO

NRZI coding can be used

PAUSE = 2

Time between xmitting operation (poll) 200 ms

POLLED = YES

Polled Line

REPLYTO = 1

Time between retries of operation (polls) if not answered 1

 

second, maybe 2 or 3

RETRIES = (1,2,5)

Retry 1, wait 2 seconds, do it 5 times

SERVLIM = 4

Number of regular Scans of NCP order table before a special

 

scan (PU not responding to SNRM)

SPEED = 4800

Line Speed (300 to 19.2K baud)

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Page 67
Image 67
Black Box A/S-4 manual System/Line Gen for Batch