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Overview
© 2007 JDSU. All rights reserved.
www.jdsu.com/hbn
Ranger LB255 Telephone Test Set
Overview
The Ranger LB255 is our most powerful telephone test set. It is DSL-
safe, incorporates a built-in amplified speaker and includes advanced
features, such as inbound and outbound line identification with
caller ID testing, to make your tests as comprehensive as possible.
Lightweight and compact, it is small enough to carry either in a
pocket or small pouch, but rugged enough to stand up in the field.
Key Features
DigiView DTMF decode allows
you to see the digits as a dial-out
is in progress and capture them
ADLI Auto Dial Line Identification
inbound and outbound line
identification with caller ID testing
Trafixguard senses digital lines
by identifying under- and over-
voltage conditions
Totally DSL safe
Insta-Talk amplified speaker with
simultaneous intercom capability
for talking while testing
Amplified speaker with three
volume levels
Enhanced memory dialing
with alpha and numeric capability
Eight-number memory
Technical support number
programmed into memory dial
Tone and pulse dialing
Microphone mute
Last number redial24 digits
Electronic ringer
Amplified line monitor for
volume levels comparable to
off hook operation
Modular cord set attachment
Headset for hands-free use
Auto power-off eliminates
dead batteries
LCD display shows
On-hook voltage
Number dialed
Off-hook current
Set-up information
Stored numbers
Battery condition
Continuous polarity indication
Caller ID
Call waiting/caller ID
Caller ID errors
LB255 Includes:
Ranger with ADLI Bed of nails cord set LB35
Mini headset LB40 Nylon pouch LB80
Order Number: LB255
VIAS Number: LB255
LB255-BT Includes:
Ranger with ADLI Bed of nails cord set LB35
Mini headset LB40 Protective boot LB81
Order Number: LB255-BT
VIAS Number: LB255-BT
Ranger with
protective boot Technical Specifications
www.jdsu.com/hbn
Ranger LB255 Telephone Test Set
Electrical
Battery current consumption (typical)
BELL (timed out) 15 µA

TALK

CWCID off 4 mA
CWCID on 12 mA
MON 25 mA
Battery life
3050 hrs typical
Return Loss
14 db @ 600 ohms
Line Current Range
15 to 120 mA
Apparent Line Resistance
275 ohms at 20 mA
Monitor Mode Impedance
130 Kohms
Pulse Dialing
Pulse Rate
10 pps ± 10%
Make/Break Ratio
60/40% ± 2%
Interdigit Interval
820 mSec
Resistance in break
230 Kohms
DTMF Output
(into 600 ohms)
Tone Frequency error
± 1.5%
Tone Level
High group 6 dBm ± 2 dB
Low group 8 dBm ± 2 dB
High vs Low Difference
2 dB ± 1 dB
Memory Dialing
Type
8 programmed
Last Number Redial
Memory Capacity
24 digits
Memory Retention with battery
> 2 years
Flash Duration
600 mSec ± 50 mSec
Pause Duration
Tone 3.0 sec
Pulse 3.4 sec
Measurement
Voltage
0 to 128 VDC ± 5%
Current
10 to 140 mA ± 5%
Environmental
Operating temperature
32°F to 122°F (0°C to 50°C)
Storage temperature
4°F to 140°F (20°C to 60°C)
Physical
Length, without lanyard
7.25 in (18.4 cm)
Width
2.50 in (6.4 cm)
Height
1.68 in (4.3 cm)
Weight, with cord set
< 10 oz (284 g)
© 2007 JDSU. All rights reserved.
POLB2550407