IBM 3745 Series, Hardware Maintenance Reference

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LIC Type 1
LIC Type 2
(RPQ) (note 5)
LIC Type 3
LIC Type 4A
(note 4)
LIC Type 4B
high-speed
(note 4)
Transmission
speed
Up to
19 200 bps
(Note 1) Up to
230 400 bps
(Note 1) Up to
256 000 bps
(Note 1)
Up to 9600 bps
(Note 1)
Up to
256 000 bps
(Note 1)
Number of lines Up to four One One Up to four One
Transfer mode
Half-duplex or
duplex Half-duplex or
duplex Half-duplex or
duplex Half-duplex or
duplex Half-duplex or
duplex
Protocols
Start-stop, BSC,
SDLC
BSC and SDLC BSC and SDLC SDLC SDLC
DTE clocking
(Note 2) Up to
19 200 bps
Not allowed Not allowed Not allowed Not allowed
Direct attach-
ment (Note 3) Up to
19 200 bps
Not allowed
Up to
245 760 bps
Up to 9600 bps
From 19 200 to
245 760 bps
Notes:
1. The total number of LICs per CSC is not limited by performance considerations (refer to “Selective
Scanning” on page 4-45 for description).
2. Called 'internal clock' on CDF information screen.
3. Direct attachment allowed with internal clock function (ICF).
4. LIC type 4A and LIC type 4B are physically identical (same part number). The microcode sets the LIC
to the appropriate type at set mode time.
5. LIC type 2 is available only on RPQ basis.
4-10
IBM 3745 Models 130, 150, 160, 170, and 17A: Hardware Maintenance Reference