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Wireless Local Loop System

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Number of Subscribers 1000 (Maximum); per DIU
Number of CBS 20 (Maximum); per DIU
Number of BSDs 5 (Maximum); per DIU
Operating Frequency (Mhz) DB1 1880 – 1900
DB2 1900 – 1920
DB3 1910 – 1930
Redundancy Hot Standby provided for all single point failures, except failure of
interface cards.
Network Configuration Local Exchange with R2MF signaling on E1 interface. Access unit with V5.2 interface on E1 lines. DID-PBX with R2-MF signaling on E1 lines & Two-wire junction lines. PABX with two wire junction lines.
Busy Hour Call Attempts (BHCA) 20,000
Maximum Traffic
per CBS 5 erlang at 0.5% blocking; supports typically 33 subscribers at 0.15 Erlang/sub. 50 subscribers at 0.1 Erlang/sub. & 70 subscribers at 0.07 Erlang/sub
Voice Coding Toll Quality, 32 kbps ADPCM as per ITU T G. 726
Instruments Supported Standard two wire telephone or payphone with battery reversal & 16/12 KHz (optional) metering pulse. Modems up to 9.6 kbps, G3 Fax. RS 232 Interface to PC for 35 or 70 kbps internet access
Number of Tones Up to 11
Number of 3 party conferences 8
Number of Announcements 10 (2 six-second segments played alternately for each announcement.)
Modulation GFSK, MC-TDMA
Data Transmission Rate Up to 32 kbps (simultaneous voice and data) or up to 64 kbps data only

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