
VDT/VDR1505WDM Series
IFS Digitally Encoded Video with 
One-Way “Up-the-Coax” Data
Overview
The IFS VDT/VDR1505 series video and data transmission 
system is designed for full compatibility with “Up-the-Coax” 
video/data systems from major manufacturers such as 
Panasonic Proteus™, Pelco Coaxitron™, Bosch Bi-Linx™, and 
others. The module supports simultaneous broadcast quality 
transmission of 10-bit digitally encoded video and “up the coax” 
data over one multimode or single mode fiber. Plug-and-play 
design ensures ease of installation requiring no electrical or 
optical adjustments. The VDT/VDR1505 series features an 
optional contact closure input that allows an additional device 
such as a dome tamper switch or alarm input to be added and 
its signal transmitted back to the monitoring location. This 
feature eliminates the need for installing additional wiring to 
support the alarm contact closure. The modules incorporate 
power, video and data status indicating LED’s to monitor 
proper system operation. The modules are available in either 
stand-alone or rack mount versions.
Application Examples
• Panasonic Proteus
• Pelco Coaxitron
• Bosch Bi-Linx™ (Add ‘-B’ for Bosch Bi-Linx™ Compatibility)
™
™
Standard Features 
• Transmission of Video and “Up-the-Coax” One-Way Data
• 10-Bit Digitally Encoded Video Transmission
• Exceeds RS-250C Short-Haul Transmission
• Optional Bi-Directional Contact Closure
• NTSC, PAL, SECAM Compatible
• Full Color Compatibility
• No In-field Electrical or Optical Adjustments Required
• Power, Video and PTZ Data Status Indicating LED’s  
to Monitor System Performance
• Integrated WDM for Greater Product Reliability
• Hot-Swappable Rack Modules
• Automatic Resettable Fuses on all Power Lines
• Distances up to 30 miles (50 km) 
• Comprehensive Lifetime Warranty
Digitally Encoded 
Video with One-Way 
“Up-the-Coax” Data
Video and data transmission 
designed for full-compatibility  
with “Up-the-Coax” systems from 
major manufacturers.
 

Specifications
Monitor
Video & 
Control
Video & 
Control
Bosch,
Panasonic,
or Pelco 
Camera 
VDT1535WDM VDR1535WDM
1 Fiber
9/125µm SM
up to 15 miles
(25 km)
ifs
International
Fiber
Systems
Incorporated
203.426.1180
ifs
International
Fiber
Systems
Incorporated
203.426.1180
Video
Video Input/Output:   1 volt pk-pk (75 ohms) 
Bandwidth:    5 Hz - 10.0 MHz 
Differential Gain:    <1% 
Differential Phase:    <0.7° 
Tilt:      <1% 
Signal-to-Noise Ratio (SNR):  >67 dB @ Maximum Optical Loss Budget
Data
Data Interface:    Pelco Coaxitron™, Panasonic Proteus™, Bosch Bi-Linx™
Wavelength    1310/1550 nm, Multimode or Single Mode
Number of fibers    1
Connectors
Optical:     ST 
Power and Data:    Terminal Block with Screw Clamps 
Video and Sync:    BNC (Gold Plated Center-Pin)
Electrical & Mechanical
Power: 
Surface Mount:    VDT: 24 VAC C.T. @ 250 mA 
      VDR: 12 VDC @ 250 mA 
Number of Rack Slots:   1     
Current Protection:    Automatic Resettable Solid-State Current Limiters 
Circuit Board:    Meets IPC Standard 
Size (in./cm.) (LxWxH) 
Surface Mount:    7.0 x 4.9 x 1.0 in., 17.8 x 12.5 x 2.5 cm 
Rack Mount:    7.7 x 5.0 x 1.0 in., 19.6 x 12.7 x 2.5 cm 
Shipping Weight:    < 2 lbs./0.9 kg
Environmental
MTBF:      > 100,000 hours 
Operating Temp:    -40° C to +74° C 
Storage Temp:    -40° C to +85° C 
Relative Humidity:    0% to 95% (non-condensing)†
†May be extended to condensation conditions by adding suffix ‘–C’ to 
model number for conformal coating.
Note: Coaxitron is a registered trademark of PELCO Viacoax of Vicon Industries, Inc. 
Proteus is a registered trademark of Panasonic, Inc.
Ordering Information
Part Number
Multimode
62.5/125µm**
Single Mode 
9/125µm
Accessories
Options
◆
VDT1505WDM 
VDR1505WDM
VDT1535WDM 
VDR1535WDM 
VDT1535WDM-HP
PS-12VDC 12 Volt DC Plug-in Power Supply (Included) 
PS-12VDC-230 12 Volt DC Plug-in Power Supply, 230 VAC Input (Included if specified at time of order)
Add ‘-R3’ to Model Number for R3 Rack Mount - No Charge (Requires R3 Rack purchased separately) 
Add ‘-C’ for Conformally Coated Printed Circuit Boards (Extra charge, consult factory) 
Add ‘-B’ for Bosch Bi-Linx™ Compatibility
System Design
Description
Video Transmitter/Data Receiver (1310/1550 nm) 
Video Receiver/Data Transmitter (1550/1310 nm)
Video Transmitter/Data Receiver (1310/1550 nm) 
Video Receiver/Data Transmitter (1550/1310 nm) 
Video Transmitter/Data Receiver (1310/1550 nm)
Fibers Required
1
1
Optical Pwr. Budget
15 dB
15 dB
18 dB
Max. Distance*
3.0 miles (5 km)
15 miles (25 km)
30 miles (50 km)