RC802/804-120B*2 Dual 4E1 Modular Fiber-Optic Multiplexer (Rev. M) User Manual Raisecom Technology Co.
Raisecom Technology Co., Ltd 1. Cautions Please read the following notices carefully before installing and using the device, Raisecom does not respond to any loss that caused by violating safety notice. This series fiber-optic multiplexer is integrated device that has precise elements, please avoid violent shakes and impacts, and do not disassemble or maintain the device yourself. If it is required, please do it under the guide of our technical staff following in the steps of anti static.
Raisecom Technology Co., Ltd Contents 1. Cautions ...........................................................................................................................................1 2. Overview ..........................................................................................................................................3 2.1. 2.2. 2.3. 3. Parameters.......................................................................................................................................
Raisecom Technology Co., Ltd 2. Overview 2.1. Introduction RC800-120B series fiber-optic multiplexers are ideal fiber-optic transmission devices for point-to-point networks, medium-sized and small capacity networks, such as wireless communication base stations, private communication networks, and switching networks. The transmission capacity of each optical port is 4 E1 channels.
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Raisecom Technology Co., Ltd 3. Parameters 3.1. E1 Interface Specification Bit rate: 2048Kbps±50ppm Line code: HDB3 Impedance of interface: 75Ω (unbalanced) or 120Ω (balanced) Electrical characteristics: complies with ITU-T G.703 Transfer characteristics: complies with ITU-T G.823, G.724 Input jitter tolerance: complies with ITU-T G.823, G.724 3.2.
Raisecom Technology Co., Ltd 4. How to use 4.1. Introduction of the Front Panel Fixing Handle Power (Green), ON when works properly L line indicates local alarms, R for remote alarms E1 LOS alarms (Red): ON when loss of signal in E1 channels First Unit LOS optical alarm (Red): ON when loss of signal in optical link ERR alarm (Yellow): ON when receiving error occurs. The detailed alarm reasons, including LOF, 10-3 BER, and 10-6 BER can be viewed in network management software.
Raisecom Technology Co., Ltd working in good condition. 4.2. DIP-switches Configuration 4.2.1. Dip-switches for E1 Interface Impedance There are 8 groups of 4-bit dip-switches, UP1 to Up4 and DW1 to DW4. These switches cannot be managed by network management software, so they must be set manually.
Raisecom Technology Co., Ltd 5th bit OFF ON Loop-back type option Remote loop-back enable Local loop-back enable Fiber BER tester Multipl exer Multipl exer E1 E1 Local Remote Figure2: sketch map of setting remote loop-back on local site Fiber BER tester Multipl exer Multipl exer E1 E1 Remote Local Figure3: sketch map of setting local loop-back on local site Note: When any loop-back is set on local site, 1st ~ 4th loop- back DIP-switch of remote site must be all off (not loop-back).
Raisecom Technology Co., Ltd 5. Installation and Test 5.1. Inspect after Opening Please first check if the models and part numbers are in consistence, and also check if the equipments are damaged. 5.2. Preparation before Installation z z z z z z z Carefully read this manual Prepare all kinds of the cable. Ensure that they are not short-circuited. Refer to Appendix A for cable making. Ensure RC004-16 is properly installed, and the chassis is well connected with the ground.
Raisecom Technology Co., Ltd in the fiber cable. 5.3.3. Applying the Power Supply When PS is turned on, the PWR indicator shall be on. After applying the power supply, first please ensure there is no alarm at the optical port. If the optical port is connected properly, there shall not be LOS alarm. When just applying the power supply, the ERR (yellow) indicator shall be on. This is because of the few error bits generated by the jitters. It shall be out after 10 – 20 seconds.
Raisecom Technology Co., Ltd E1 sub-channel, press “mask” button to “on” to musk the alarm after finishing the configuration of device. z Mask button is on, but there is still alarm in unused E1 sub-channel. Answer: probably the mask function is disabled if power supply is cut off and then turned on. To solve is by pressing the mask button to “OFF”, and then pressing to “on” to enable mask function. • How to unplug the coaxial cable from the coaxial connector.
Raisecom Technology Co., Ltd 6. Appendix A Introduction of Cable Making A.1 E1 Cable • 75 Ohm signal adopts DB37 coaxial adapter: SYV 75-2-2 coax cable, the distance shall not be longer than 200m. First pick out the CC3-K3 connector from the accessories, and release the tail protecting jack. Secondly, separate the core from the shield, and put the tail protecting jack on it. Solder the strand with the core of the CC3-K3 connector. Solder the cable shield with the shield of the CC3-K3 connector.
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