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PRODUCT DESCRIPTION
This product is designed to extend 30 analogue telephone lines from one location to another, across a fibre optic link. The lines can be either 2-wire telephone lines, or 4-wire audio E&M lines.
The system consists of two separate units on either end of the fibre. The Exchange Side is connected to a PABX or to exchange lines, and the Telephone Side is connected directly to the telephone instruments.
The units are compact, self-contained, and are 6U high, and can be mounted directly into a 19-inch rack. Each system consists of it's respective modular power supplies, controller cards, and 4-channel line interface cards. There are 8 slot positions for line interface cards, and all can be populated to form a 30-channel link (only two channels are available in the last slot - position 8)
At the Exchange Side, up to 30 telephone lines are split up into voice and signalling channels, and then multiplexed together into a single PCM data stream, and finally transmitted over the fibre optic link.
At the Telephone Side, the combined PCM information is then decoded into the individual channels, and then reconstructed to resemble the original lines.
To the exchange or PABX, the system portrays standard telephone instrument characteristics, and to the telephone instrument, the system portrays standard exchange characteristics.
A fibre pair (two cores) are required for the system - one for transmit, and the other for receive. The fibre cable can be terminated directly onto the optic devices on the unit. The distance over which the system can operate, can be changed by selecting different fibre interfaces. The options are 3.3, 12 & 20km on multimode fibre; and 40, 60 or 80 km on singlemode fibre.
The total number of telephone lines that can be connected to the system is 30, and can be populated in multiples of 4.
Additional options are available. Contact the supplier for more detail on additional extras.
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