Westermo TD-34 - Manual (Page 3)

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1. Introduction
The TD-34 is Westermo’s current top of the range analogue Telephone Modem intended for
use under the most extreme conditions.The TD-34 is the result of Westermo’s experience
and knowledge in the area of Industrial Telecommunication over more that 25 years. High
noise environments, difficult configurations and customer-specific applications can easily be
solved using TD-34 product.The philosophy for the TD-34 is based on quality and function
rather than optimizing for price. Nothing has been left to chance when designing this modem.
The TD-34 is an asynchronous modem with RS-232 and RS-485/422 interfaces built-in
as standard.The TD-34 can be used on standard PSTN “ Public Switched Telephone Network”
or Leased Lines consisting of either 2 or 4-wires for line connection.
The RS-485/422 interface can be configured as either end of line or intermediate using
2 or 4-wires.
The Opto-isolated Alarm interface on TD-34 may be used either for dial up based on a certain
event or as indication from the remote end. Indication of the state of the alarms is provided
on the front panel of the TD-34.
RS-232 2- or 4-wire leased line RS-232/422/485
TD-34 TD-34
PSTN