User manual

Technical Specifications
308684-B Rev 00
A-7
DS3 Interface Card Specifications
The DS3 port adapter’s T3 port is designed to receive and transmit at the DSX-3
level while driving and receiving from a 75-ohm coaxial cable (ATT 728A type
coax). The T3 port connects directly to any equipment with DSX-3 level BNC
connectors. Table A-5
lists the specifications for the DS3 interface.
Table A-5. Specifications for the DS3 Interface
Parameter Specification
Line rate 44.736 Mb/s (20 ppm)
Line code B3ZS (bipolar with three-zero substitution)
Impedance 75 ohms
Pulse shape ANSI T1.102, pulse amplitude between 0.36 and 0.85 V
peak
Input signal DSX-3 (9.7 dB to -11.8 dB)
Output signal DSX-3, able to drive 450 ft (135 m) of 75-ohm coaxial cable
(728 A or equivalent) and meet pulse shape template at the
line side