Double transmission capacity with simplest solution KBIT/S MODEM
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ADPCM TRANSCODER TC2000 SERIES
Double transmission capacity with simplest solution
KBIT/S MODEM SIGNAL TRANSMISSION QUALITY SIMPLY WORLD'S BEST-TIME TC2000 SERIES
Overview TC2000 transcoder
doubles your transmission capacity existing line while minimizing your investment. compress 2048 kbit/s streams into single 2048 kbit/s ADPCM stream vice versa using OKI's advanced kbit/s ADPCM technology.
transmission while other ITU-T Rec. G726 based technology transmit upto kbit/s data.
OKI's unique technology also transmit kbit/s data GIII
Since development 1987 field-proven reputation, TC2000
been introduced over countries most popular (Low Rate Encoder) telecommunication field.
Another model TC2000B both kbit/s channels 1024
kbit/s channels applications also available.
TC2000 troubled history
32Kbit/s Adaptive Differential Pulse Code Modulation (ADPCM) algorithm (Melbourne 1988) ITU-T (CCITT) G.721 only allows transmission voice band data 4.8Kbit/s. Geneva 1990, ITU-T(CCITT) G.726 proposed algorithm using 32,24 16Kbit/s ADPCM. this algorithm, voice band data transmitted using 40Kbit/s ADPCM. This however, limited only channels (30channels 8/5) when using 2Mbit/s transcoder because compression carried 5/8th capacity (40Kbit/s/64Kbit/s). Attempts transmit channels using this kind system have resulted degradation voice quality (24Kbit/s ADPCM) because becomes necessary discriminate between voice signals 24Kbit/s voice band data 40Kbit/s.
Voice Band Data
V.29 9600bps MODEM BLER
10100
9600 ITU-T Rec.
Modem used: CODEX MODEM 2645
BLER (511bits/block)
10-1
Oki's 32Kbit/s ADPCM G.721/G726's 32Kbit/s ADPCM
Oki's advanced ADPCM ITU-T G.721 ADPCM 1,2: Number links
BLER (511bit Block)
10-2
Number links
10-3
10-4
solution
therefore developed marketed TC2000 using Oki's unique 32Kbit/s algorithm which transmit voice band data 9.6Kbit/s. this does suffer from kinds problems described above, clear that TC2000 from best choice carriers worldwide.
*The kbit/s ADPCM G.726 identical kbit/s ADPCM G.721. G.726 summary G.721 G.723 will additional descriptions.
(dB) (dB)
Permissible Analog Tandem Links Modems
MODEM RATE ITU-T G.721/G.726 32Kbit/s ADPCM Oki's 32Kbit/s ADPCM
4800bps 7200bps (V.29) 9600bps (V.29) 9600bps (V.32) 12000bps (V.33)
4Links 1Link applicable 1lLink applicable
4Links 4Links 2Links 4Links 2Links
Typical Applications (TC2000)
Digital Satellite Circuit (IDR) Optical Fiber Circuit
2Mb/s (64Kb/s 30ch)
2Mb/s (64Kb/s 30ch)
TC2000
2Mb/s ADPCM (32Kb/s 30ch)
TC2000
2Mb/s ADPCM (32Kb/s 30ch) 2Mb/s ADPCM (32Kb/s 30ch)
Digital Satellite Circuit (IDR)
Earth Station
MUX&OLTE
Earth Station TC2000
2Mb/s ADPCM (32Kb/s 30ch)
MUX&OLTE
2Mb/s ADPCM (32Kb/s 30ch)
2Mb/s ADPCM (32Kb/s 30ch)
TC2000
2Mb/s (64Kb/s 30ch) 2Mb/s (64Kb/s 30ch)
Switching Center Multiplex Equipment OLTE Optical Line Terminating Equipment Optical Fiber Circuit
Typical Applications (TC2000B)
Digital Microwave Circuit Digital Satellite Circuit (IDR) case 1024 kbit/s)
2Mb/s (64Kb/s 30ch)
2Mb/s (64Kb/s 30ch)
TC2000
2Mb/s ADPCM (32Kb/s 30ch)
TC2000B
2Mb/s ADPCM (32Kb/s 30ch)
RADIO
Digital Microwave Circuit
Earth Station
1024 kb/s ADPCM (32Kb/s 30ch)
Digital Satellite Circuit (IDR)
RADIO
2Mb/s ADPCM (32Kb/s 30ch)
Earth Station TC2000B
1024 kb/s ADPCM (32Kb/s 30ch)
TC2000
2Mb/s (64Kb/s 30ch)
2Mb/s ADPCM (32Kb/s 30ch)
2Mb/s (64Kb/s 30ch)
features TC2000 TC2000B Compatibility
TC2000 used TC2000B replacing card. TC2000B used TC2000 adding three cards replacing card.
User Friendly Configuration
Installation Maintenance very easy because simple configuration equipment.
Compliance
TC2000 series comply with Electro-Magnetic Compatibility) requirements with respect Marking" approved countries.
TECHNICAL DATA
Channel Capacity Code Conversion Direct Time Slot Transfer Frame Synchronization Plesiochronous Function Digital Sequence Test Safeguarding Interface (E1) rate Date rate Code Impedance Nominal peak voltage mark Nominal pulse width Frame structure ADPCM Interface (E1) rate Date rate Code Impedance Nominal peak voltage mark Nominal pulse width Frame structure Monitoring Alarm Output Total Number Cards Power Supply Power Consumption Enviroment Operating temperature Relative humidity Physical Dimensions Weight TC2000B 16ch 15ch with Safeguard 60ch with CCS* 14ch with CAS/CCS 62ch 30ch 30ch with safeguard 58ch with CAS* 30ch with CAS/CCS Conversion 64Kbit/s-A-law signal from 32Kbit/s ADPCM signal Selection direct time slot transfer/ADPCM conversion ITU-T(CCITT)Rec.G.735 Section Plesiochronous function provided input output stream(s) Internal test facilities using digital sequence check ADPCM transcoding algorithm event power supply failure, stream bypasses transcoder thereby Secures half full transmission capacity. 2048Kbit/s 50ppm 2048Kbit/s (64Kbit/s HDB3 75ohm unbalanced 120ohm balanced 2.37V(75ohm) 3V(120ohm) 244ns ITU-T(CCITT) Rec.G.704 Section 2048Kbit/s 50ppm 2048Kbit/s. (32Kbit/s HDB3 75ohm 120ohm 2.37V(75ohm) 3V(120ohm) 244ns ITU-T(CCITT) Re.G.704 Section
incoming signal, frame alignment ignal, ERR, AIS, Safeguarding Power Failure
TC2000
1024Kbit/s Kbit/s 20048Kbit/s (64Kbit/s
512Kbit/s (32Kbit/s 1024Kbit/s (32Kbit/s X30)
(+5, 0.9A/system degrees centigrade (not condensed) 483mm 222mm 330mm (two systems mounted)
0.6A/system
(two systems mounted)
*CCS Common Channel Signaling Channel Associated Signaling
specification details subject change without notice.
Contact
Electric Industry Co.,Ltd. Telecom Network Division, 4-10-3 Shibaura, Minato-ku, Tokyo 108-8551, Japan 5445 6351 5445 6362 E-mail adpcm-sales@oki.co.jp
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