IBM ThinkPad 130, Introduction Manual, Page: 44 / 104

LIC Characteristics
Following are the main characteristics of the LICs 1 through 6.
Speed : Up to 19.2 kbps
Protocol : Start-Stop, BSC, SDLC
Interface : CCITT V.24 and V.25 (EIA 232D and 366), CCITT V.25 bis (see
Note),
CCITT X.20 bis and X.21 bis
Number of LIC1s per scanner: Up to 8.
Note: CCITT Recommendation
V.25 BIS
for switched connections
allows call establishment and data transfer to take place over
the same port. This eliminates the need for a second physical
port (on a LIC1) and its associated Automatic Calling Unit
(ACU). The 3745 supports the following CCITT
V.25 BIS
options:
Ÿ
Call establishment in SDLC or start-stop mode,
Ÿ
Data transmission in SDLC, BSC, or start-stop mode,
Ÿ Call request with number to be dialed (CRN command),
optionally accompanied by the identification number of the
caller (CRI command),
Ÿ
"Call Failure Indication" and its associated two-character
failure condition (if provided by the DCE),
Ÿ
"Delayed Call Indication" (if provided by the DCE) and its
associated parameter (up to three characters specifying the
minimum time before next call attempt),
Ÿ
"Invalid Indication" from the DCE (a command sent to the
DCE cannot be processed),
Ÿ
Auto-answer controlled by the 3745 and based on the
"calling indicator" circuit.
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IBM 3745 Models 130, 150, 170: Introduction