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256-KBPS LINE DRIVER (V.35, RS-530, OR X.21)
1. Specifications
Compliance: FCC Class A, IC Class/classe A
Protocol: Synchronous or asynchronous
Clock Source: Internal, external (from attached device), or receive clock derived
from the receive signal
Flow Control: None
Operation: 4-wire, full- or half-duplex, point-to-point or multipoint
Data Rate: Sync: 19.2, 32, 48, 56, 64, 72, 96, 112, 128, 144, 192, or 256 kbps
(user-selectable); Async: 19.2, 28.8, 38.4, 57.6, or 115.2 kbps (user-selectable)
Maximum Distance: See the tables in the Appendix
User Controls: (4) Front-mounted buttons: (1) DIG, (1) ANA, (1) REM, (1) PATT;
(1) Internal data-rate screwdial; (14) Internal jumpers and (1) internal 3-position
DIP switch for timing, testing, signal levels/impedances, and other features
Diagnostics: V.54-compliant loopback tests; V.52-compliant BERT
Standards: Loopback tests: ITU-TSS V.54; BERT: ITU-TSS V.52
Leads/Signals Supported: See Tables 4-2 through 4-5
MTBF: 75,500 hours
Interfaces: Line side: Proprietary; Device side: ITU-TSS V.35
Connectors: ME444A-R3, ME444AE-R3: (1) 34-pin M-block female, (1) 5-position
terminal block;
ME444A-530-R3, ME444AE-530-R3, ME445C-530, ME445C-35,
ME445C-X21: (1) DB25 female, (1) 5-position terminal block
Indicators: (7) Front-mounted LEDs: PWR (power), RTS, TD, RD, DCD, TEST,
ERR (error)
Temperature Tolerance: 32 to 122°F (0 to 50°C)
Humidity Tolerance: Up to 90% noncondensing