11
CHAPTER 1: Specifications
Connectors
(continued) —
On adapter cables:
For each V.35 port: (1) M/34 female;
For each X.21 port: (1) DB15 female
1.2 DDS Port (Port 1 on “-DDS” Models Only)
Interface —
Digital Data Service (DDS) as per AT&T
®
Pub. 62310
Clock Source —
Either internal (transmit) or recovered from line signal
(receive), user-selectable
Data Rate —
4.8, 9.6, 19.2, or 56 kbps, user-selectable
Maximum
Distance —
Over 24-AWG (0.6-mm) wire:
6.5 mi. (10.5 km) at 9.6 kbps,
5 mi. (8 km) at 19.2 kbps, or
4 mi. (6.5 km) at 56 kbps;
Attenuation —
Up to 43 dB
Transmit
BPV Sequence —
Zero suppression
Received
BPV Sequence —
Out of service (OOS), out of frame (OOF), DSU
loopback
Connector —
(1) Rear-mounted RJ-48 female
1.3 The Control Port
Flow Control —
Hardware (RTS/CTS) or software (X-ON/X-OFF), user-
selectable
Data Rate —
38,400, 19,200, 9600, 4800, 1200, 600, 300, 150, 110, or
75 bps (user-selectable)
Maximum
Distance —
50 ft. (15.2 m)
Command
Modes —
X.28, extended