RC 905 EE1
Contents
1. RC 905 EEL Ethernet to E1 Interface Converter User Manual Chapter 1 Chapter 2 Chapter 3 Chapter 4 Contents RC905 EE1 REV B Overview menereee enne 3 Operating TASTUGUOM A tasa sadamale 4 CCOMNCE MON vankrite sms tasuma aamen td 11 TrOUDIESHOOLIDE SA aata a 12 Chapter 1 RC905 EE1 REV B Overview Modification of Rev B for the users of RC905 EE1 REV A if you are new user please ignore it 1 Please be informed for the old customers that we ve altered the definition of the 1 2 and 3 bit of SW2 switch on the bottom 2 The duplex auto negotiation capability is added at the Ethernet port to enable connection with auto negotiation port of switch 3 The MDI MDIX capability is added at the Ethernet port which makes engineers not confused by wire order 4 The back pressure flow control in half duplex mode is added in the Ethernet port 5 The limitation of broadcast storm is also added Special Specification RC905 EE1 REV B can be interoperated with old version REV A but please be noticed thin the definitions of 1 and 3 bit of SW2 have changed If there are any questions please consult our technical staff RC905 EE1 cannot interoperate with RC901 EE1 and RC902 EE1 Main Features Provides one 10 BaseT Ethernet RJ45 port and one E1 75 ohm BNC and 120 ohm RJ45 port to perform transmission of Ethernet data in E1 Channel Provides both fractional E1 and Transparent E1 mod2. Link disconnects RLP indicator is steady ON The equipment is probably set in remote loop back mode Please check 4 bit of SW2 and set it to OFF RAL is steady ON Remote alarm indicates there is fault occurred at remote E1 receive link Please check the link status of local TX to remote site RX VIL No alarm indication and LNK indicator is steady ON but link can not be pinged through This is normally caused by that some equipment in the network has been fixed as 100M half duplex or full duplex at E1 port The electric port of this equipment can only be connected with ports of 10M or self negotiation Please check the bit rate of network equipment port VIIL Severe network packet loss If the interface converter is set up at fractional E1 pattern refer to the definition of 3 bit of SW2 on the button panel then it is needed to set Master Clock mode on one side and Slave Clock mode on another side equipment If the interface of Ethernet equipment is set up as 10M full duplex mode then the 1 bit of SW2 on the bottom panel should be set as ON 15
3. 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 Maximum bandwidth 1 1 1 1 1 1 31 64K 1984K Maximum bandwidth 2 In the table above 0 means ON 1 means OFF For instance 384Kbps bandwidth setting should be 00110 then the Dip switch should be set up as ON ON OFF OFF ON It s suggested to write down the binary code of bandwidth then set up according to the rule of 1 means OFF 0 means ON The default status of these 5 bits of dip switches is OFF Note The bandwidth at central office and at the remote site should be the same Maximum bandwidth 1 means maximum bandwidth for the condition PCM30 Maximum bandwidth 2 means maximum bandwidth for the condition PCM31 6 bit PCM 31 30 selection dip switch at fractional E1 pattern ON PCM30 mode also called FAS CAS mode OFF PCM31 mode also called FAS only mode default mode This bit setting of dip switch of two interoperated interface converters should be the same otherwise the equipment will not work properly 7 bit CRC4 checkout selection dip switch on E1 fractional mode ON to disable CRC4 Checkout OFF to enable CRC4 Checkout default It can be set up as per the user s requirement but OFF is recommended to conduct Checkout This bit setting of the dip switch of two interoperated interface converters should be the same
4. is disconnected Check whether the link type is matching the straight cables shall be used to connect switches and HUB s the cross over cables shall be used to connect routers and NIC s Check whether the transmission bit rate is matching the bit rate of the Ethernet ports of the equipment connected with interface converts shall be auto negotiation or fixed 10M TII Link loss alarm indicator LOS of El link is ON LOS alarm indicates E1 interface cannot receive signals Check whether E1 input signal link is connected well and whether wire order of 120ohm twisted pair cable connector is correct Check whether there is any power off with the eguipment connected with interface converter Please check whether E1 receive link is disconnected with bit error tester IV LER indicator is on It indicates that at least one kind of alarm occurs among E1 Loss of frame alignment LOF upstream link alarm AIS and checkout fault CRC When equipment is working at transparent mode LER alarm means AIS alarm only Please check whether there is any power off with the E1 uplink equipment Please check whether the interface impedance setting is correct In the case of using 120ohm twisted pair cable connector check whether the wire order is correct and whether the connection is loose Please check whether E1 transmit link is disconnected with bit error tester and whether the bit error rate is beyond limit LOF alarm causes LER indicator flashing
5. on remote site loop back mode by Dip switch if the RLP indicator is on it indicates the test is successful and the link is in good condition When the device is working it is off RAL RED _ It indicates remote site E1 link alarm On El fractional pattern when LOS or LER alarm occurs at the remote site equipment the RAL at the local site device is on When EI is working properly it is off Ethernet Link Indicators LNK Green When it is on it indicates that network link is connected properly ACT Green When it is flashing it indicates that data is transmitting and receiving FDX Green When the Ethernet link is working on full duplex mode it is on in the half duplex mode when the collision occurs it is flashing Power Indicators PWR Green When power supply is working properly it is on Definitions of the Interfaces E1 Interfaces TX BNC connector 75ohm unbalanced Port El signal output RX BNC connector 75ohm unbalanced Port E1 signal input BALANCE RJ 45 connector 120ohm balanced port Ist and 2nd pins for Output 5th and 6th pins for Input NOTE RJ 45 balanced port and BNC unbalanced port cannot be used in the same time Please set up by Dip switch before using The factory default setting is 75 ohm BNC Ethernet Interface ETH Ethernet Unshielded Twisted Pair port please see the port definition and Link method in the following chapter II Product Parameters 1 Technical Specifications of E
6. 1 Interface Bit Rate 2048Kbps 50ppm Line Code HDB3 Input Impedance 75Q unbalanced BNC connector 120Q balanced RJ 45 connector Electrical Characteristics Compliant with ITU T G703 recommendation Frame Structure Compliant with ITU T G704 recommendation this equipment supports time slot allocation Jitter Tolerance Compliant with ITU T G 823 recommendation Functions Complete link alarm indication Fault Pass Through FPT and intelligent auto restoration Note When some other equipment such as PCM DXC etc which need to modify the timeslot 0 of E1 are deployed along the transmission link the loop back control and remote site alarm interrogation capabilities will be disabled 1 El Cable Type It is recommended to use SYV 75 2 2 cable with unbalanced BNC connectors The maximum transmission is about 200 meters For balanced RJ 45 port 0 6mm 22AWG Twisted Pair Cable is recommended 1 Technical Specifications of Ethernet Interface Uses 5 CAT cable for 10Base T Unshielded Twisted Pair RJ 45 connector and it can transmit up to 100 meters Supports IEEE 802 3 protocol and full half duplex auto negotiation Supports fixed duplex mode when auto negotiation fails Supports IEEE 802 3d Spanning Tree and IEEE 802 1q VLAN Supports maximum Ethernet Data Frame length up to 1593 Bytes Supports IEEE 802 3x flow control on full duplex mode Supports back pressure flow control on half duplex mode Supports auto MDI MDIX capability Bui
7. NC NC RD RD NC NC Meaning Signal Signal Suspend Suspend Signal Signal Suspend Suspend Output Output Input Input When the 120 ohm balanced connector is connected with other equipment it s necessary to make clear definition for the pins of other equipment The connection method of pins is as follows BALANCE RJ45 of RC series converter E1 link equipment balanced connector TD Signal Output TD Signal Output RD Signal Input RD Signal Input 12 Notice When connecting the twisted pair cables TD and TD should be twisted as a pair and RD andRD too V RC905 Ethernet to E1 interface converters should be utilized in pairs in point to point mode It cannot be interconnected with third party Ethernet to E1 interface converters VI Installation of DC Power Supply DC power supply provides three connecter ends 48V ground and OV These three connecter ends are connected respectively with 48V power cable ground protection PGND and OV power cable Note PGND Connection is necessary for safety operation of equipment 13 Chapter 4 Troubleshooting If there is any problem during installation and application please try to solve it according to the following suggestions If it is not solved yet please contact technical staff for support I Power indicator PWR is OFF There is fault with power supply system Il Ethernet link indicator LNK is OFF Check whether the network cable
8. es The E1 bandwidth can be set in the fractional E1 mode as N 64Kbps N 1 32 When working in the fractional E1 mode it has the remote site control function can control remote E1 loop back and can interrogate remote site alarm information Supports maximum Ethernet frame length up to 1593 bytes Supports Full Half duplex auto negotiation at the Ethernet port Supports IEEE802 3x flow control in full duplex mode at the Ethernet port Supports back pressure flow control in half duplex mode at the Ethernet port Chapter 2 Operating Instruction I Introduction of Front Panel E1 Link Loss Remote Loop Ethernet Back Indicator Ethernet Link TX RX Action Alarm RC905 EE1 LOS RUP oO TORET BALANCE RX BaL E1 LOF AIS CRC Remote site Alarm Full duplex mode Overall Alarm Indicator Power Indicator The definitions of indicators are as follows E1 link indicators LOS RED Loss of receive signal alarm at E1 link When E1 link is working properly it is off LER RED Fault alarm of receive signals at E1 link On fractional E1 pattern this alarm indicates that there is loss of frame LOF AIS upstream E1 alarm or CRC CRC4 fault of fractional E1 On El transparent unframed pattern this alarm indicates AIS upstream E1 alarm only When E1 link is working properly it is off RLP Yellow It indicates the normal status of remote site loop back test On fractional E1 pattern when setting this equipment
9. keep factory default status OFF when the equipment is working properly 3 bit Fractional transparent selection switch of E1 interface On E 1 fractional mode Transmission bit rate is N 64Kbps N 1 31 OFF El transparent mode also called un fractional mode and the transmission bit rate is 2048Kbps Default At default status the equipment is working on E1 transparent mode and the dip switch SW1 is thoroughly disabled Only when this bit is set up to fractional E1 mode the 8 bits of dip switch SW1 is workable 4 bit Remote loop back control Switch of E1 interface for engineers to test link condition ON in test status Remote site Loop back E1 input signals of the remote site equipment is not processed internally but directly output from the output port OFF No loop back When equipment is working in normal status it should be OFF This bit of dip switch can be set to test link status only when the equipment works in master clock mode and on fractional E1 pattern Whether the remote site loop back is successful or not is judged by the RLP yellow indicator on the front panel On 5 8 bits For setting up impedance of E1 interface please see the table below Dip switch 5 bit 6 bit 7 bit 8 bit T5ohm BNC effective ON ON ON OFF 120ohm RJ 45 effective OFF OFF OFF ON Please set up interface impedance of El port strictly in conformity with the above table if not the eguipment will
10. lt in 1K MAC address list with address filtering function to increase E1 link efficiency Built in 64Mbit SDRAM memory to reduce data congestion 1 Working Temperature 0 45 Humidity 5 90 non condensing 5 Power Supply AC DC optional AC 220V 50Hz Input range 165V 265V DC 48v Inputrange 36V 72V Power Consumption 1W 6 Dimension 120 mm W x32 mm H 150 mm D a Switch Setup There are two 8 bit Dip switches on the RC905 EE1 bottom panel Please set up the dip switches before turning on the power of eguipment 1 SW2 close to E1 port Switch 1 bit Duplex mode setup switch in case duplex auto negotiation of Ethernet port fails ON Full duplex mode when auto negotiation fails OFF Half duplex mode when auto negotiation fails Default Bottom View Setup Switch from top to button is 1 8 bits Right is ON leftis OFF It is needed to set up the Ethernet port working status of connected switches hubs or NICs according to following table Switch Setup of Local Actual Working Port of Remote site Equipment Equipment Mode 10 100M Auto negotiation Any 10M Full Duplex Fixed 10M Half duplex OFF default 10M Half Duplex Fixed 10M Full Duplex ON 10M Full Duplex 10M Duplex Auto negotiation Any 10M Full Duplex Because the Ethernet port of the local equipment is set as on 10M full duplex auto negotiation mode it cannot be connected with the port of fixed 100M rate 2 bit Please
11. or blinking it indicates there is loss of frame alignment of E1 signal When the equipment works at transparent pattern there shall be no LOF alarm Please check whether the interface impedance setting is correct Please check whether bit error rate is beyond limit with bit error tester 14 VI If the El link is provided by other equipment within the first several minutes after the power supply is applied LER alarm indicator may be flashing and this is in normal status Please wait for a while the alarm will gradually disappear If LER is flashing for a very long time the link is in abnormal status CRC alarm indicates there is severe bit error with E1 link If the equipment is working in transparent mode there shall be no CRC alarm CRC alarm may appear with LOS or AIS Please check whether bit error rate is beyond limit with bit error tester When the equipment is working sometimes CRC alarm may suddenly appear LER alarm indicator is frequently flashing and the network is disconnected The problem is usually caused by the link initializing process that the power supply of the equipment is cut off and then turned on In this case stop the service with heavy traffic and the equipment will recover the link in 10 30 seconds automatically If CRC Check selection ON OFF dip switch the 7th bit of SW1 switch is set up as ON disable CRC checkout function then this alarm indicator LER flashing is not caused by CRC check
12. otherwise the equipment will work not properly 8 bit ON OFF clock mode selection dip switch ON Receive Timing following E1 link also called Slave Clock OFF Local timing also called Master Clock default This bit setting is effective only at fractional E1 pattern If working at fractional E1 pattern one device should be set up to master clock mode and the other should be slave clock mode otherwise they will not work properly If DXC PCM MUX equipment is used in the E1 link there should be only one master clock in the whole E1 link and the rest equipment just follow E1 link receiving clock SW1 Factory Default Setting Switch 1 2 3 4 5 6 7 8 ON OFF E 7 E E E E E E Meaning Full Timeslot N 31 PCM31 CRC3 Master Enable Clock Please note Before applying power supply in order to prevent excessive power level difference between equipment along the E1 link and protect equipment interfaces it is recommended that connect E1 link first before turning on the power supply Try the best not to hot swap the E1 interfaces a Occupation of forwarding data on fractional E1 mode Timeslot occupation on the PCM31 mode On the PCM31 mode N lt 31 the timeslot 0 is occupied by the system N is counted from 1 timeslot 10 TS 0 TS 1 TSIN TS 31 Timeslot occupation on the PCM30 mode 35 BANDWIDTH n On the PCM31 mode N lt 30
13. the 0 and 16 timeslots are occupied by the system N is counted from the 1 timeslot If N is bigger than 16 it will skip over 16 timeslot TS 0 TS 1 TS 16 TSIN 1 TS 31 ps BANDWIDTH 11 Chapter 3 Equipment Connection I Make sure E1 link cable matches the connected equipment If the equipment connected with RC interface converters in E1 link are comprised of such equipment as PDH SDH etc please refer to the manuals of these equipment for the type definition and line impedance of E1 interfaces II Ordinary Application Solution When the interface converter adopts all default settings it provides one 75 ohm unbalanced E1 interface one Ethernet port that can be connected with switches with 10 100M auto negotiation ports or low cost HUB to provide 2048Kbps transmission bandwidth For adjustment of parameters of the eguipment please refer to instructions of dip switches in chapter 2 HT Connect the interface converter with CAT 5 twisted pair cable and please note that the twisted pair cable shall be no longer than 100 meters The Ethernet port of this eguipment supports auto MID MIDX It can be connected with Ethernet ports of any eguipment with either straight cable or crossover cable IV When using the 120ohm balanced interface the F1 link pins of the BALANCE RJ45 twisted pair cable are defined as follows PIN No 1 2 3 4 5 6 7 8 Definition TD TD
14. work improperly SW2 Factory Default Configuration Switch 1 2 3 4 5 7 8 ON n n OFF 7 a 7 E 7 Definition When Disable Equipment is Remote 75 ohm BNC effective at E1 auto negot Fault Pass on Loopback interface iation Through transparent is disabled fails it s capability E1 pattern on Half Duplex 1 SW1 dip switches only effective on the condition that the 3 bit of SW2 is set up to ON i e in fractional E1 mode 1 5 bit For setting up the Ethernet bandwidth i e N value of N 64kbps bit rate Please see the table below 1 Bit 2nd Bit 3rd Bit 4th Bit 5th Bit Bandwidth Unit bit s 0 0 0 0 0 0 64K OK 0 0 0 0 1 1 64K 64K Minimum bandwidth 0 0 0 1 0 2 64K 128K 0 0 0 1 1 3 64K 192K 0 0 1 0 0 4 64K 256K 0 0 1 0 1 5 64K 320K 0 0 1 1 0 6 64K 384K 0 0 1 1 1 7 64K 448K 0 1 0 0 0 8 64K 512K 0 1 0 0 1 9 64K 576K 0 1 0 1 0 10 64K 640K 0 1 0 1 1 11 64K 704K 0 1 1 0 0 12 64K 768K 0 1 1 0 1 13 64K 832K 0 1 1 1 0 14 64K 896K 0 1 1 1 1 15 64K 960K 1 0 0 0 0 16 64K 1024K 1 0 0 0 1 17 64K 1088K 1 0 0 1 0 18 64K 1152K 1 0 0 1 1 19 64K 1216K 1 0 1 0 0 20 64K 1280K 1 0 1 0 1 21 64K 1344K 1 0 1 1 0 22 64K 1408K 1 0 1 1 1 23 64K 1472K 1 1 0 0 0 24 64K 1536K 1 1 0 0 1
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