Telecom Analysis Systems Inc. - TAS 240 - Other
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Equipment:
TAS 240
Date:
1992
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Information
The
TAS 240 Voice band Subscriber Loop Emulator (VSLE) is a
general purpose loop emulator for voiceband applications.
The VSLE provides simulation of up to four (4) loops in a
single enclosure. The VSLE has been designed specifically to
provide the loop emulation required for testing high-speed
voiceband modems per the specifications provided by (or
currently proposed by) the EIA/TIA TR30.3 sub-committee,
ETSl, and the CCITT.
The VSLE simulates four loops in order to completely emulate
the network which interconnects two modems. The four loops
are allocated to the following:
~) One "main" loop between the Telephone Network Emulator
station A, and modem ‘’A".
-) One "main" loop between the Telephone Network Emulator
station B, and modem "B".
-) One "tracking11 loop to provide the balance network for
the station A hybrid.
-) One "tracking0 loop to provide the balance network for
the station B hybrid.
The second pair of loops, '‘main" loop for station B and its
associated tracking loop, are an optional feature of the VSLE.
In addition to loop simulation the VSLE simulates metering
pulses which are present on the local loops of several
European countries, and are specified by the ETSl test
specifications. Metering pulses are also an optionaPfeature
of the VSLE.
The available models and configuration of options for the
TAS 240 VSLE are as follows:
240A VSLE with four loops and Metering Pulses.
240 VSLE with four loops.
240L VSLE with two loops
(Loop A with A tracking loop).
240M VSLE with Metering Pulses and no loops.
This manual describes the 240A system unless otherwise
indicated.
The
TAS 240 Voiceband Subscriber Loop Emulator (VSLE) is
designed to emulate the local loop conditions specified by
the EIA/TIA TR30.3 subcommittee (proposed for EIA RS-496B),
the ETSl NET 20 document, and the loop conditions of the
CCITT TD-237 document. In addition the
TAS 240 will emulate
user defined loops. The
TAS 240 emulates up to two sets of
loops where each set consists of a "main" loop and its
associated "tracking" loop. The main loop is used to emulate
the Station A or Station B local loop, while the tracking
loop is used primarily as the balance network for balancing
the Station A or Station B hybrid. Loop B is independent of
Loop A, however each tracking loop is always identical to
its main loop. For test configurations which do not require
the balance network to be identical to the loop, the
tracking loop may be used as a primary loop.
The
TAS 240 VSLE may be equipped with the optional Metering
Pulse generator when initially purchased. This option allows
the user to program the frequency, level, and cadence of the
metering (or billing) pulse signal injected onto the
specified main loop. Metering Pulses are required to meet
the ESTI testing • requirements of several European countries.
The
TAS 240 is intended to be integrated into a complete
modem test system under control of TASKIT. The components of
the overall test system include a TAS 1022
Gemini Dual
Terminal Emulator, and either the
TAS 100 Series or TAS
Series II Telephone Network Emulator Alternatively, the TAS
240 may also be used as a standalone product, controlled
manually via the front panel, or remotely via RS-232 or
IEEE-488.
User manual
Manual type:
User manual
Pages:
482
Size:
16.4 MB
Language:
english
Revision:
1.13
Manual-ID:
2710-2398
Date:
January 1992
Quality:
Scanned document, all readable.
Upload date:
Feb. 5, 2017
MD5:
a8b995e4-2003-143e-8325-05e9d629774e
Downloads:
526