Synway Information Engineering Co., Ltd
Chapter 1 Overview
These Synway E-type digital trunk boards are earmarked for PBX. They have almost all
functions needed for call/voice processing systems which are connected to them through
E1/T1/J1 trunks. These boards are designed with the enhanced capability in echo
cancellation and the DMA Read and Write function which speeds up the data transfer and
minimizes the cost of CPU, further improving the system performance.
1.1 Functions
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A single board accommodates 1, 2, 4 or 8 E1/T1/J1 trunks
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Supports China SS1, SS7 and ISDN connections in E1/T1 mode
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Supports phone calling and voice processing
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Activity/silence
detection
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Automatic Gain Control (AGC) support in recording operation
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Enhanced echo cancellation
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Up to 64 fax channels optional on a single board
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Allows DTMF transmission and detection during voice recording or playback
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Includes H.110 bus, facilitating smooth connectivity to third-party boards with
H.110 bus for the transfer of acquired voice signals to other devices
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The flexible distributed conferencing system sets no limit on the number of
simultaneous conferences and participants in each conference, allows monitoring
and recording of the whole conference and each individual speaker
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Equipped with hot-swap circuits to support board insertion and extraction during
runtime, easy for maintenance and backup
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The on-board lightning-proof circuit reaches the telecom standard and surely
eliminates the damage caused by lightning
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Equipped with the EMI circuit, effectively preventing the electromagnetic
interference
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Each board has a unique hardware serial number written in the firmware to
distinguish itself from other boards and prevent piracy. The number is available via
an easy function call with applications
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The on-board authorization code identification circuit is designed for software
Synway SSW Series E-type Digital Trunk Boards Hardware Manual
(Version 1.1)
Page 1
