Karel DS200, Техническое справочное и монтажное руководство

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DS Series PBX Technical Reference And Installation Guide
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VII.3.Q. EX200 (8E&M/0) E&M LINE MODULE
In addition to the circuits explained above, there are 8 identical E&M line circuits on the
EX200B (8E&M/0) card.
Each line has 2-4 / 4-2 wire conversion circuits, a CODEC for analog to digital and digital to
analog conversions in speech channels, and a transformer, as well as standard DC current
detectors for E wire in the signaling channels and relays for M wire.
Since E&M is an aged, but widespread interface for Inter-exchange Connection Line
applications, and since several different configurations are applied on the field, the EX200B
(8E&M/0) card has been designed in a flexible structure so as to meet the most widespread
configuration needs. Each line has a configuration block that contains jumpers to be
adjusted, allowing arrangements according to different configurations.
Connections to the EX200B (8E&M/0) card are made over the CON2 line connection card.
The EX200 (8E&M/0) module supports the Type-1 and Type-5 connection types that have
been specified for the EX200 (4E&M/0) module and it provides two-wire speech channel
possibility.
VII.3.R. EX200 (4PLC/0) PLC LINE MODULE
In addition to the circuits explained above, there are 4 identical PLC line circuits on the
EX200B (4PLC/0) card. Thanks to this card, it is possible to employ the exchanges of DS200
series for voice transmission over high voltage power lines by connecting them to interface
devices that have been designed for that purpose.
Each line has 2-4 / 4-2 wire conversion circuits, a CODEC for analog to digital and digital to
analog conversions in the 4-wire speech channels, a transformer, a control probe (probe k)
to turn on or off compander (compressing/expanding) circuits, and an alarm probe (probe a)
to detect alarms coming from compander devices, as well as standard DC current detectors
for E wire in the signaling channels and relays for M wire.
Besides, each line can be used in 3 different modes:
•
PLC: This mode should be used for configurations, in which special PLC converters
are used.
•
PCM: This mode should be used in environments, in which special PCM multiplexers
are used.
•
Remote Extension: If the PLC line will be used to drive only a single extension in long
distance, then this mode should be used.
By employing that card, extensions can make use of the features step by step, break-in (a
conversation) and cut-off (a conversation.)
Connections to the EX200B (4PLC/0) card are made over the CON2 line connection card.