RC801/803/805-120B 4E1 Fiber-Optic Multiplexer User Manual Raisecom Technology Co., Ltd.
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. RC800-120B series optical multiplexer provides two types of power supply: AC and DC. When using DC power supply, please plug the power supply connectors according to this mannual strictly and avoid contrary connecting.
Raisecom Technology Co., Ltd Contents 1. Cautions ...........................................................................................................................................1 2. Overview ..........................................................................................................................................3 3. 4. 2.1. Introduction ..............................................................................................................................3 2.2.
Raisecom Technology Co., Ltd 2. Overview 2.1. Introduction RC801/803/805-120B 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 switches organizing networks. The transmission capacity of RC800-120B is 4 E1 channels (equivalent to 120 voice channels). 2.2.
Raisecom Technology Co., Ltd DC —— DC -48V power supply Note: RC801 standalone fiber-optic multiplexer shall work in pairs RC803 and RC805 must cooperate in pairs. One RC803 must work with one RC805. 2.4. Dimensions Compact 19-inch standard 1U-high chassis, 440mm (W) x 43.
Raisecom Technology Co., Ltd 3. Parameters 3.1. E1 Interface Parameters Bit rate: Line code: Impedance of interface: Electrical characteristics: Transfer characteristics: Input jitter tolerance: 2048Kbps±50ppm HDB3 75Ω (unbalanced) or 120Ω (balanced) complies with ITU-T G.703 complies with ITU-T G.823 complies with ITU-T G.823 3.2.
Raisecom Technology Co., Ltd 4. How to use 4.1. Introduction of the Front Panel GL Power OFF Alarm of Fiber LOS on E1 Dip-switch ON 12 3 4Interface 56 NM Function Button Figure1: Sketch of the front panel of RC800-120B 4.1.1. Power indicator PWR (green): On, power supply is functioning normally. 4.1.2. Alarm indicators Alarm indicators of both local and remote side can be displayed. The L row indicates “local”. The R row indicates “Remote”.
Raisecom Technology Co., Ltd OFF OFF OFF OFF No loop-back OFF OFF OFF ON 1st E1 OFF OFF ON OFF 2nd E1 OFF OFF ON ON 3rd E1 OFF ON OFF OFF 4th E1 ON ON ON ON All E1 links Note: Only two test method can be set: single E1 channel loop-back or all E1 channels loop-back. When single E1 channel loop-back is testing, the other channels work normally. • 5th bit: loop-back type options This switch is used to choose “remote loop-back” or “local loop-back” when performing the E1 loop-back operations.
Raisecom Technology Co., Ltd 4.1.4. DIP-switch SW2 Setup: All OFF by Default SW2 is the switch for address code setting. When all OFF, the equipment can be remote managed; otherwise, it can be managed locally through LNK-UP port. The addresses shall not be the same for the equipment cascaded at OFF one serial port. There are 4 bits of this switch, so that the max number ON 1234 of local cascade equipment is 15. 4.1.5.
Raisecom Technology Co., Ltd 4.2.2. Power Socket AC: 220V standard triple-phase power socket DC: -48V power interface. Left pin for -48V, right pin for 0, and the middle pin for ground 4.2.3. Optical Port • The fiber connector is DSC/PC for dual-strand models, TX for signal output and RX for signal input The fiber connector is SC/PC for single strand models. • 4.2.4. E1 Interface There are 4 groups of E1 interface. Each provides 2 BNC coaxial ports and 1 RJ45 port. Refer to Appendix A for cable making.
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 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 the pressure of power supply is in the tolerance range, the chassis is well connected with the ground.
Raisecom Technology Co., Ltd 5.3.3. Configuring Buttons and Switches After turning on power of the device, first ensure there is no alarm on optical port. If optical ports are connected properly, there shall be no LOS, LOF, and E-3 alarm. The E-6 (yellow) may be on the moment when the power is just turned on. This is because turning on the power causes jitters which results in a few bit errors. After 10 seconds, E-6 will be off. This indicator refreshes in every 10 seconds.
Raisecom Technology Co., Ltd 6. Troubleshooting If there are any problems during installation and using, try the following proposals. If the problems still can not be solved, please contact distributors/agents for help. The following explanations and solutions for alarms at optical ports and LOS alarms at E1 ports are used to handling local alarm problems. For remote-end alarms, please handle them at remote site. z Green PWR indicator not on Answer: PS faults.
Raisecom Technology Co., Ltd z LOS red indicator of E1 sub-channel is on Answer: Loss alarm of RX signal at E1 sub-channel, no HDB3 signal is received. Check whether all E1 ports are connected well, or whether 75 Ω cables are reversely connected, or whether the wires of 75 Ω cables are in right order. If LOS alarm occurs at unused 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.
Raisecom Technology Co., Ltd 7. Appendix A Introduction of Cable Making A.1 E1 Cable 75 Ohm BNC connector: SYV 75-5, SYV 75-3, or SYV 75-2-2 coax cable，the distance shall not be longer than 200m. First pick out the BNC 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 BNC connector. Solder the cable shield with the shield of the BNC connector.
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