User’s manual FlexGain Plex, V2
Version 1.3
11 from 99
The device provides multiplexing of time slots (TSs) of the E1 G.703 stream to the
V.35 interface and to a number of low-rate (up to 64 kbit/s) interfaces installed on
interchangeable (daughter) boards. Each daughter board containing a circuit board for four
channels is installed into the main devices, i.e., the basic module. It is possible to install up
to two voice daughter boards into one basic module. The ring generator for the FXS side
represents a separate RINGER daughter board.
The multiplexer allows the transmission of two E1 streams by installing an additional
FG-Plex-E1 board. In this mode the device can cross connect time slots between two
streams (PCM1 – the Е1 stream integrated to the basic board, PCM2 – the Е1 stream on
the FG-Plex-E1 expansion board).
The variety of devices manufactured at present is presented in the “Ordering
Information” section.
The device can be used to provide the following services:
• Increase in the telephone capacity (up to 8 numbers - address digits) by using
pairs of analogue FXO/FXS interfaces;
• Increase in the telephone capacity (up to 8 numbers - address digits) by using
the digital connection to the PBX over the E1 stream and the analogue FXS
interfaces;
• Voice-frequency channels with two- and four-wire connections (up to 8);
• Organization of the telephone capacity and voice-frequency channels
according to the “point-multipoint” scheme;
• Organization of voice-frequency channels with the E&M signaling (to order);
• Data transmission channel over the V.35 interface at a rate from 64 to 1984
kbit/s;
• Cross-connect of time slots of two E1 streams.
The number of services is being expanded as the variety of daughter boards
increases.
Each Е1 interface supports the following operation modes:
• PCM31 – a framed stream with the formation of the frame alignment;
• PCM30 – a framed stream with the formation of the frame alignment and
multiframe alignment;
• PCM31C – a framed stream with the formation of frame alignment and
organization of the cyclic redundancy check by the CRC4 method;
• PCM30C – a framed stream with the formation of frame alignment and
multiframe alignment and organization of the cyclic redundancy check by the
CRC4 method.
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