|
- Provides full duplex voice and data communications between a control site and a remote site using fully digital techniques.
- Provides an interface between Voice Switching System and remotely located radio transmitters and receivers
- Provides Speech plus Data Modem for operation over unconditioned 4-wire telephone lines and satellite links
- Provides a high speed user serial data interface @1200 BPS or 300 BPS for trans-receiver tuning and other controls
- Provides status monitoring and health check of various assets located at remote sites
- Provides excellent unmatched voice quality because no part of bandwidth is used by digital modem (as done in older designs using FSK)
- Provides two separate and independently operating voice channels in one RCE unit, thus reducing system cost by 50%
- Auto-switching to backup line in case of line failures
- Low Power requirements allows it to run with convection cooling
|
| Distinguishing Features
Uses Texas Instruments TMS320C5410A
DSP running @ 160 MIPS, executing most of the instructions in single clock cycle
The DSPs employs a high degree of
parallelism and enhanced Harvard architecture
for increased performance
Superior all digital design approach employing speech encoding @ 8KBit/s
Digitization scheme embeds control data with voice in 19.2 Kbit/s data stream, thus providing high degree of data reliability
End-to-end voice bandwidth of 300-3300 Hz
All digital scheme does not need band-pass filters to isolate voice and data, as done in older analog designs using FSK modem schemes
Push-to-talk throughput time (RCE-to-RCE over unconditioned telephone lines) is typically 50 msec without sacrificing any audio band-width
Provides superior operation by eliminating PTT and transmit voice skews
All Input/Output (I/O) signal connections are made through standard 25-pair telephone type connectors, which are used widely in communication systems
16 BIT CRC insures data integrity
Up to 6 controls (PTT M, PTT S, RX M/S, TX M/S, Rcvr Mute, Over-ride) for each radio frequency, with confirmation signal
Can introduce up to 500 ms Tx audio delay in 1 msec steps to compensate for satellite channels
|
|
