Karel DS200, Technical Reference And Installation Manual

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TWT is an aged, but widely used interface that is utilized in some networks for Inter-
exchange Connection Line applications. Any one of the MFR2 or DP signaling types can be
used. Card software used for those signaling types are different. Therefore, it is essential to
employ the appropriate software.
Connections to the EX200B (4TWT) card are made over the CON3 line connection card.
VII.3.O. EX200 (8TWT) SPECIAL DUPLEX LINE
MODULE
In addition to the circuits explained above, there are 8 identical TWT line circuits on the
EX200B (8TWT) card.
Each line has 2-4 / 4-2 wire conversion circuits, a CODEC for digital to analog and analog to
digital conversions in speech channels, and a transformer, as well as DC current detectors
on signaling channels and relays.
TWT is an aged, but widely used interface that is utilized in some networks for Inter-
exchange Connection Line applications. Any one of the, DTMF, MFR2 or DP signaling types
can be used. The card software covers all these three signaling forms embedded. Therefore,
the selection among them can be made simply by programming (no hardware modification
required).
Connections to the EX200B (8TWT) card are made over the CON3 line connection card.
VII.3.P. EX200 (4E&M/0) E&M LINE MODULE
In addition to the circuits explained above, there are 4 identical E&M line circuits on the
EX200B (4E&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
(4E&M/0) card has been designed in a flexible structure so as to meet all configuration
needs. Each line has a configuration block that contains jumpers to be adjusted according to
different configurations.
Connections to the EX200B (4E&M/0) card are made over the CON2 line connection card.
The module supports R1 signaling feature, ANI detection and transmission feature, and
CAS1B signaling protocol.
The EX200 (4E&M/0) module is capable of fulfilling the requirements of the entire
configurations below.