RC 903 V35 FE1 V.
Contents Chapter 1 RC903-V35FE1 (Rev.
Chapter 1 RC903-V35FE1 (Rev.B) Overview 1. Descriptions: RC903-V35FE1 is a standalone interface converter . It provides signal conversion between V.35 and transparent E1 or fractional E1, and can be used for V.35 signal over E1 network transmission. As growing utilization of E1 resources, many data transmission solutions using E1 link are accepted by users at large. RC903- V35FE1 is standalone equipment, with built-in power supply, and can be placed on the desk. 2.
Link error report (LER): ON: receiving signal error occurs at local E1 link (include AIS at uplink E1, LOF and CRC4) OFF: no error occurs Remote alarm (RAL): ON: LOS or LER alarm occurs at remote converter Remote loop-back test (RLP): ON: remote E1 link in loop-back status Definition of Interface: E1 interface: TX BNC connector 75Ω unbalanced interface, E1 signal output RX BNC connector 75Ω unbalanced interface, E1 signal input BALANCE RJ-45 connector 120Ω balanced interface, 1 and 2 pin output; 5 and
Definition of standard V.35 (DCE) interface: The left figure shows V.35 interface ISO 2593 connector. Our converter adopts DCE Connector Face – 34-Pin Female connector, which can be connected with DTE cable.
Chapter 2 Connection Configuration 1. Equipment Interconnection Interconnection of RC series interface converters must follow the rules shown in the table below. Otherwise, link disconnection or abnormal data transmission may occur. Central Office Customer Premises RC903-V35FE1 RC903-V35FE1 RC904-V35FE1 RC903-V35FE1 2.
2) Point-to-point fractional E1 mode in “Terminal clock — Slave clock” structure (Terminal clock) (Slave clock) (Clock source) When remote DTE equipment has to follow the clock phase of local DTE equipment, which is to say, TX CLOCK of local DTE is internal clock source, users can set Terminal Clock Mode in local converter, and Slave Clock Mode in remote converter, and must configure clock frequency at V.35 interface of local DTE equipment.
4) Point-to-point transparent E1 mode in “Master clock — Slave clock” structure or “Terminal clock — Slave clock” structure Transparent E1 Transparent E1 (Slave clock) (Master clock) Clock Source Transparent E1 Transparent E1 (Slave clock) (Terminal clock) (Clock source) When working in the transparent E1 mode, users need to set Master clock in the converter at one side and Slave Clock Mode in the converter at the other side. In some special occasions, it is required to follow V.
5) Extended connection type In this connection type, the converter is not used in pairs, but connected with equipment of other manufactures. If Routers with E1 interface are used at remote side, users are required to first confirm all the parameters of E1 link, such as fractional/transparent E1, PCM30/31, CRC enable/disable, clock relations, bandwidth distribution and time slot usage etc. If any one of them does not match the setting of the converter, there will be problems in connection.
Chapter 3 Installation & Preparation 1. Cautions when the power is on 1) 2) 3) Hot-swapping V.35 interface is forbidden It is not advised to hot-swap E1 port When the power is on and E1 transmitting and receiving links are connected, it is safe to disconnect or connect one of E1 links. It is suggested that the protecting ground (middle of the adapter) be connected first when using DC –48V device. Note that inverse connection of positive and negative polarity is strictly forbidden. 2.
4. Fault-Pass-Through (FPT) When there is LOS or LER alarm showing in the converter, it indicates that there is a fault in E1 receiving link, and then the DCD signal at V.35 interface will be disconnected. When there is RAL alarm showing in the converter, it indicates that there is a fault in E1 transmitting link, and then the CTS signal at V.35 interface will be disconnected. 5. Ambience Operation temperature: 0-45 C Operation humidity: 5%~90% no condensing 6.
Chapter 4 Dip-switch Setup 1. Definitions of dip-switch setting (frequently used) on front panel 1) Dip-switch is frequently used on the front panel. It should be set before use. 1st~5th bit V.35 interface bandwidth setting 6th bit Bandwidth active/passive control setting 7th and 8th bit Clock mode option 2) OF ON 1 2 3 4 5 6 7 8 1st ~5th bit: V.35 interface bandwidth setting V.35 bit rate is N×64Kbps N=1~31 at E1 fractional mode; V.35 bit rate is 2048Kbps at E1 transparent mode.
1 1 0 0 1 25×64K=1600K 1 1 0 1 0 26×64K=1664K 1 1 0 1 1 27×64K=1728K 1 1 1 0 0 28×64K=1792K 1 1 1 0 1 29×64K=1856K 1 1 1 1 0 30×64K=1920K(Max. bandwidth 1) 1 1 1 1 1 31×64K=1984K(Max. bandwidth 2) In the table above, symbol “1” means OFF, and symbol “0” means ON. For example, 384Kbps bandwidth setting should be “00110”, then the dip-switch should be set to “ON, ON, OFF, OFF, ON”.
When setting loop-back test by the switch on the bottom panel, the definition of the 6th bit changes to loop-back type option. 6th bit After setting of loop-back, choose loop-back type OFF Remote E1port loop-back ON Local V.35 port loop-back Please see the definition of the 5th bit of switch on the bottom panel for content of loop-back test. 4) 7th and 8th bit: clock mode option 7th bit 8th bit Clock mode option OFF OFF Master Clock Mode (Internal clock) OFF ON V.
TX CLK positive: sampling TD signal at TCK clock falling edge TX CLK negative: sampling TD signal at TCK clock rising edge RX CLK positive: transmitting RD signal at RCK clock falling edge RX CLK negative: transmitting RD signal at RCK clock rising edge z PCM30/31 option is for that when other equipment (e.g. DXC and MUX) in E1 channel requires frame structure to be PCM30, then the converter should be set PCM30 effective (N≤ 30); when PCM31 is required, the converter should be set PCM31 effective (N≤31).
be displayed. Local V.35 interface loop-back test is usually used to check if V.35 cable is properly connected, or Router port starts working, or the phase relationships of clock and data signals between the converter and Router is consistent. As mentioned in previous text, the 6th bit of dip-switch on front panel is defined as bandwidth active/passive control option when works in normal mode; it is defined as remote/local loop-back option when doing loop-back test.
Chapter 5 Troubleshooting If there are any problems during installation and operation, please try to solve them according to the following suggestions. If the problems still exist, please contact distributors for help. z Power (PWR): indicator OFF Answer Please check if there is any fault with power supply. z Loss-of-Signal (LOS) alarm in E1 link: indicator ON Answer: LOS alarm caution that your E1 interface cannot receive signal. Please check if the input cable is properly connected.
slot engrossment and same setting of PCM30/31 and CRC. However, Passive Bandwidth Control function and E1 loop-back test of remote converter cannot be used. z Compatibility with other V.35 products Answer: RC903-V35FE1 and RC904-V35FE1 can cooperate with other products that have similar functions, such as followings: 1. SUBM-FV35, N x 64K V.35 interface module, can be installed in RC800-240B series standalone PDH fiber-optic multiplexer. 2. RC800-30B-FV35, N x 64K V.
