Introduction
The Southwire B600 Professional Telephone Test Set is a line
powered portable handset designed for temporary communica-
tions and testing on analog phone lines. It provides DTMF (touch
tone) and pulse dialing, an electronic ringer, polarity indication,
and autodial for up to 10 numbers. The high impedance mode
allows monitoring the line without disrupting conversations or
data communication. With proper use, this tester will provide
many years of reliable service.
1
2
• Read, understand and follow Safety Guidelines and Operating
Instructions in this manual before using this tester.
• Do not connect to AC power.
• Use caution when checking electrical circuits.
Comply with all safety codes.
• Do not modify or try to repair the tester.
No serviceable parts are inside.
• Do not use during electrical storms or in wet or damp environments.
• Do not use the tester near explosive vapors, dust or gases.
• Do not use if the test leads or tester appear to be damaged.
WARNINGS
Maintenance
This tester is designed to provide years of dependable service,
if the following care instructions are performed:
1. KEEP THE TESTER DRY. If it gets wet, wipe it off.
2. USE AND STORE THE TESTER IN NORMAL
TEMPERATURES. Temperature extremes can shorten the life
of the electronic parts and distort or melt plastic parts.
3. HANDLE THE TESTER WITH CARE.
Dropping it can damage the electronic parts or the case.
4. KEEP THE TESTER CLEAN. Wipe the case occasionally with a
damp cloth. DO NOT use chemicals, cleaning solvents, or detergents.
Loop Limit
DC Resistance (Talk Mode)
AC Impedance (Monitor Mode)
Rotary Dial Output
Pulsing Rate
Percent Break
Interdigit Interval
Leakage During Break
DTMF Output
Tone Frequency Error
Level per Tone Pair
High versus Low Tone Difference
Physical
Dimensions
Weight
Battery
2.4KΩ maximum at 48VDC
(nominal 15 mA minimum loop current)
150Ω typical at 80mA current
HI Z: 100KΩ @ 1KHz
RING: 600Ω @ 1KHz
20pps +/-0.5pps
60% +/-2%
500 ms typical
>50KΩ
+/-1% maximum
+2dBm maximum,-8dBm minimum
4dBm maximum
10.12” X 2.43” X 2.49” (25.7 X 6.17 X 6.33 cm)
11.0 oz (312.8 g)
CR2032 (included)
Operating Temperature
32°F to 122°F (0°C to 50°C)
Storage Temperature
-4°F to 140°F (-20°C to 60°C)
Humidity
10% to 90% non-condensing
General Specifications
Electrical
