FEATURES/BENEFITS
- * Interface - Supports sync/async RS-232, V.35, RS-530
and X.21
* Data Rates - Up to 2.048Mbps
- * Provides a full external loopback at the terminal port
of a DSU or modem
- * Visual indication of circuit operation
- * Line Powered
- * Compact and Easy To Install
- * Excellent tool for field technician or service organizations
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DESCRIPTION
The Data Test Set (DTS) provides a means for a technician
at a remote site to implement a full external loopback at
the terminal port of a DSU or modem and to obtain visual indication
of the circuit operation. The DTS has two physical DB-25 male
connectors which support EIA-530, RS-232 (sync and async),
and a variant of the V.35 interface standards. The DTS may
be attached directly to the female DB-25 connector on a DSU
or modem, or attached at the end of a cable. Only one connector
on the DTS may be used at one time. The DTS is not intended
to be used with DTE’s such as terminals or PCs
Four light-emitting diode (LED) indicators provide a means
for the technician to view the status of data, clock, and
certain control signals from the DSU or modem. Indicators
for clock and data provide status on the activity of the corresponding
signal, while those four control signals provide status on
the signal level. All power to the DTS is supplied via the
DSU or modem from the interface signal drivers.
The DTD performs a loopback between the following 4 DCE circuits
on both connectors:
| DCE
Output Circuit |
DCE Input Circuit |
| Receive Data (RxD) |
Transmit Data (TxD) |
| DCE Transmit Clock |
External (DTE) Transmit |
| Data Set Ready (DSR) |
Data Terminal Ready (DTR) |
| Data Carrier Detect |
Request to Send (RTS) |
The four indicators on the DTS monitor the operation of
the corresponding circuits from the DCE. In general, for
synchronous DCE all indicators ON are indicative of a normally
operating loopback circuit. For asynchronous modems, the
status of the CLOCK indicator should be ignored.
The DTS has a three year warranty and is housed in a sturdy
metal enclosure.
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