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(DDF) Digital Distribution
Frame |
 (DDF)-8System
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(DDF)-16System
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Product
Applications: |
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| The Digital
distribution frame is the intercross connection distribution
device with 75Ω characteristic resistance. This connector has
two kinds of interfaces: Siemens and AT&T. The device adopts
the programmed controlling system to finish the instruction
tracing as well as possessing the multiple functions such as
non-intrusive online test and fast switch. |
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Product
Features: |
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Adopts the intercross connection
method. Realizes the digital circuit reorganization by changing
the position of intercross connecting cables. There is no need
to relocate the in/out connection cable. Safe and flexible.
The junctions fixing the cables are at the back of the frame.
Temporary cable jumpers and online test are in the front of
the frames. Clear area allocation avoids the misoperation. Unique
linkage mechanism in the connector can reduce the repeated insertion/pull
operation of traditional Y-type plug. The connection cord can
realize the fast cable adjustment and self-loop functions.
Via a high-ohmic resistor, connector can separate a –18dB
small signal from telecommunication link circuit. After connecting
to test instruments with the test cords, realize the non-intrusive
online test function.
Unique line tracing indication system. When customers check
the cable lines, the system can give out the letter prompt and
switch on the relevant tracing indicators to give customers
an intuitive reminder. It is convenient for customers to realize
the scientific management of cable lines. There are front desk
and back-stage. Front desk is installed in the main controlling
unit of DDF. It can establish the linkage circuit information
by itself. All the linkage circuit information can be lead in
and out by computers. Back-stage is installed in the computer.
It can conduct the electronic management to link circuit information.
Easy and fast operation. Front desk can work independently by
itself; it also can cooperate with back-stage to meet the different
levels of requirements from customers.
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Product
Specifications: |
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| Withstanding
voltage |
≥1000V/1min without
spark or arc
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| Cross talk ratio |
≥70dB (50kHz~233MHz)
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| Working rate |
2Mb/s、8Mb/s、34Mb/s、144Mb/s、155Mb/s
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| Characteristic impedance |
75Ω (nominal value)
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| Contact resistance |
≤2.5mΩ for outer conductor;
≤5 mΩ for inner conductor
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| Insulation resistance |
≥1000MΩ (DC 500+/-
50V) |
| Return loss |
≥18dB (50kHz~233MHz) |
| Insertion loss |
≤0.3 dB (50kHz~233MHz) |
| Pulling force |
>50N |
| Separate force |
2.2N – 10N |
| Mechanical durability |
500 times |
| Operating temperature |
-5°C~+40°C |
| Storage temperature |
-25°C~+55°C |
| Relative humidity |
≤85% (30°C) |
| Air pressure |
70kPa~106kPa |
| Tracing system work voltage |
-48V |
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