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BT8110 Datasheet PDF : 84 Pages
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Bt8110/8110B
High-Capacity ADPCM Processor
Appendix E . E1 ADPCM Transcoder
E.1 Introduction
E.1.2 Summary
The transcoder assembly can be used to double the voice-channel capacity of an
E1 line, as shown in Figure E-2. The full-rate E1s can come from DCS systems,
channel banks, PBXs, or other E1 PCM stream signal sources.
Figure E-2. Single-Board Transcoder Application
E1
A
32 Kbit/s ADPCM E1
A
E1
Transcoder C
C Transcoder
E1
A
B
E1
100060_028
E.1.3 ADPCM Transcoder System Specifications
Table E-1. ADPCM Transcoder System Specifications
Name
Description
Channel Capacity
ADPCM Coding
Signaling Modes
E1 Framing
Line Interface Unit
Configuration Control
Synchronization
Alarms
E1 Self-Test
Transparent Channels
Diagnostic Test
Program Storage
Idle Channel Control
Slip Buffer
Power Requirement
Board Dimensions
60 channels, full-duplex.
32 kbit/s ADPCM per ITU–T Recommendation G.726.
Signaling per ITU–T Recommendation G.761.
Per ITU–T Recommendation G.704, G.706, G.732.
Integral analog line interface unit Bt8510 E1 Framer.
Via built-in 4.8 kbit/s serial port.
A and B E1 outputs synchronized to received C E1. C E1
output synchronized to A, B, or C input or to external
timing reference.
All E1 alarms available via microprocessor. Indicators
provided as required.
Looping of each E1 available via microprocessor control.
E1 PCM channels can be selected as transparent according
to requirements of recommendation G.761.
Full-time in-service diagnostic test of ADPCM processor
for all channels using timeslot 0 and timeslot 16.
Storage of configuration data during power outage in
nonvolatile EEROM or NOVRAM memory.
Per-channel optional insertion of selectable PCM code and
signaling states on all idle channels.
0–250 µs on A, B, and C ports.
Less then 4 Watts per system @ 4.75–5.25 Volts.
Approximately 5” x 8” (12.7 cm x 20.3 cm).
100060C
Conexant
E-3
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