Comtech EF Data RCS20 - Manual (Page 17)

RCS20 M:N Redundancy Switch Revision 15
Introduction MN-RCS20 and CD-RCS20
1–3
1.3.2 Digital Data Switch (DDS20) Configurations
The DDS20 provides all of the data interconnections between the online and backup modems. The
DDS20 also provides buffering of terrestrial data signals to backup modulators allowing ‘hot-standby’
modes of operation. The DDS20 receives control and DC power through an interconnecting cable from
the RCU20. Terrestrial interface options for the DDS20 include the following options:
• Universal Interface: RS-449, V.35, RS-232, IDR & IBS Alarms
• ASI Interface: BNC Female
• G.703 Interface: Unbalanced T1, E1, T2, E2, T3, E3, STS-1
• Ethernet: RJ45 - 10/100/1000 Base-T.
The DDS20 is available in the following three configurations:
• Universal DDS20
• DDS20-ASI-M or DDS20-G.703-M (Modulator only)
• DDS20-ASI-D or DDS20-G.703-D (Demodulator only)