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Black Box Short Range Modem
A. SPECIFICATIONS
A.1 TRANSMISSION FORMAT
Synchronous or asynchronous, 2-wire/half duplex, or 4-wire/full or half duplex
A.2 INTERFACE
RS-232 (CCITT V.24) connection via DB-25 female; twisted pair connection via RJ-45
or terminal block
A.3 TRANSMISSION LINE
2 or 4-wire UTP, 19 - 24 AWG
A.4 DATA RATES
Synchronous or asynchronous at 1.2, 1.8, 2.4, 3.6, 4.8, 7.2, 9.6, 14.4, 19.2, 28.8, 38.4,
and 57.6 kbps—switch selectable
A.5 CLOCKING
Internal, external or receive recover
A.6 CONTROLS
Carrier constantly “ON” or “controlled by RTS”; RTS/CTS delay set to no delay, 7 or 53
ms
A.7 APPLICATIONS
Point-to-point or multi-point
A.8 INDICATORS
Bi-color LED indicators for TD, RD, RTS & DCD; single LED indicators for Test and
Error
A.9 RTS ANTI-STREAM TIMER
12.5 sec., 50 sec., or disabled (switch selectable); tolerance: +50%, -0%
