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2/4-WIRE LOOP TEST SYSTEM
LEASED LINE TESTING
Models 51950 & 51951 Test Sets
| The Model 51950 Test System enables rapid single-person testing of leased or private-line
circuits between a control/monitoring center and its remote sites. |
| The 51950 can be configured for measuring both the transmit and receive losses of either 2- or 4-wire loops. In applications
where a loop is transported over multiple spans, each span can be individually tested by installing several units. Repair services can be rapidly
dispatched to the problem area the first time.
Alarm sense leads can also be remotely checked by the 51950.
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Key Benefits
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Provides Remote Controlled Testing of
Transmission Levels in Both Directions
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Can be Configured to Test Multiple Spans
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Rapid Single-Person Testing; Entire Test
Takes About 3 Seconds to Complete
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Available in 2-, 6-, and 24-Circuit
Configurations
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Tests are Controlled Via a PC Using Any
Terminal Emulation Software, Such as
Microsoft Hyperterminal
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Tests Can Be Controlled Remotely Via a
Dial-Up Circuit
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Logs Time-Stamped Test Records
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Monitors and Reports Status of Up to
7 Remote Discrete Input Alarm/Status
Contacts Per Remote Unit |
Typical Single-Span Test
System Application
Typical Multi-Span Test
System Application
The 51950 is a dedicated test system that checks for transmission loss or failure over
circuits with either 2-wire or 4-wire analog interface access points. Using a PC, a technician can activate an audio level test between the base
unit and any of its remotes. Transmission loss is reported in dB's for both directions of the line under test. In applications where multiple
remotes are placed on the same loop, each remote can be tested separately. Each unit also contains multiple sense leads that can be checked via the
PC over the existing loops.
Model 51950
Specifications
- CONFIGURATIONS:
- 2 Circuit (Model 51951)
- 6 Circuit (Model 51950F1)
- 24 Circuit (Model 51950F2)
- LINE TESTS:
- Measures Transmission Loss from Base Unit to Remote Unit: +26dB to -30dB in 1dB
Increments
- Measures Transmission Loss from Remote Unit to Base Unit:+26dB to -30dB in 1dB
Increments
- TEST TIME:
- Total Test Time: 3 Seconds
- TEST TONE GENERATION:
- Amplitude: Adjustable +0, -10, and -20 dBm @ 1004 Hz
- DATA COMMUNICATIONS PORT (Model 51950):
- One RS-232 Serial Port via DB9 Connector
- TIP AND RING INTERFACE:
- 51950: Std. Telco 25-Pair 50-Pin Connectors
- 51951: Std. Modular Connectors
- ALARM/STATUS MONITORING:
- 51950: Contacts Monitored - 7 total
- 51951: Contacts Monitored - 2 total
- ALARM CONTACTS:
- Closed on Alarm State
- 60V AC/DC at 0.25A
- COMPLIANCE:
- UL 1950
- FCC Parts 15 and 68
- ELECTRICAL:
- Input Power: 8 to 16 VDC @ 0.5 Amp (115Vac transformer provided)
- ENVIRONMENTAL:
- Operating Temperature: 0° to 40°C
- Storage Temperature: 0° to 95°C
- 0% to 95% Non-Condensing
- MECHANICAL:
- 51950 Dimen: 14.0"W x 3.0"H x 9.78"D
- 51951 Dimen: 7.1"W x 1.26"H x 9.45"L
- 51950 Wt: 6.06 lbs
- 51951 Wt: 1.7 lbs
- 51950 Mtg: Wall or 19" Rack
- 51951 Mtg: Wall or 19" Rack (Mtg Kit Optional)
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