DS Series PBX Technical Reference And Installation Guide
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Besides the standard circuits such as – 48 VDC feed, handset status detection, 2-4 / 4-2 wire
conversion, each SLIC also includes a CODEC for analog to digital and digital to analog
conversions and a transformer.
Cadences of the tones and the ringers of telephones are controlled by the card’s own micro
controller.
The Caller ID information can be programmed in DTMF or FSK format on extension basis.
Connections to the EX200B (0/16C) card are made over the CON7 line connection card.
VII.3.C. EX200 (8+/0) ANALOG EXPANDABLE LINE
MODULE WITH CALLER ID
In addition to the common circuits mentioned above, there are 8 line circuits on the EX200B
(8+/0) card that are identical.
Each group of four lines includes standard circuits, namely a DC current driver, a ringer
detector, a 2-4 / 4-2 wire conversion circuit, a pulse price signal filter, a polarity reversal
detection circuit, and a CODEC that fulfills analog to digital and digital to analog conversions,
as well as a transformer for each line. Thanks to the structure of the CODECs on the module,
transmission and reception levels for the transmitted voice can be adjusted separately in 8
levels.
The most important features of this card are the possibility of capacity expansion and Caller
ID.
The card has two extra connectors to install one more card. One of the following cards can
be plugged into those connectors:
a) A card with 8 analog lines > By this way, the total capacity of the card becomes 16
analog lines.
b) The FSK Caller ID Card > By this way, the 8 lines can decode the Caller ID information,
which is in FSK format.
c) The DTMF Caller ID Card > By this way, the 8 lines can decode the Caller ID information,
which is in DTMF format.
Connections to the EX200B (8+/0) card are made over the CON6 line connection card.
VII.3.D. EX200 (0/8S0) ISDN BRI EXTENSION
MODULE
In addition to the common circuits mentioned above, there are 8 identical ISDN BRI
extension circuits on the EX200B (0/8S0) card.
Since ISDN is a digital protocol, there is no need for an extra circuit; the standard ISDN BRI
driver, which each extension has, is sufficient.
Connections to the EX200B (0/8S0)
card are made over the CON2 line connection card.
Summary of Contents for DS200
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