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Chapter 4. Test & Diagnostics

27

4.4 Local Loop Back

This test is activated by depressing the "Local Loopbk"

button. This test checks the performance of the

EOe-1

and the

connections between them. This test consists of looping the

receive E1 signal back to the remote

EOe-1

. (see Figure 4.2):

Figure 4.2 Local loop back

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Summary of Contents for EOe-1

Page 1: ...USER MANUAL EOe 1 10 100Base Ethernet over G 703 Unframed E1 ...

Page 2: ......

Page 3: ...Park 8F No 60 ZhouZi St Neihu Taipei 114 Taiwan EOe 1 Ethernet over E1 User Manual Version 1 0 October 2003 First Printing Version 1 01 October 2004 Second Printing This manual supports the following models EOe 1 Ethernet over E1 Specifications subject to change without notice ...

Page 4: ......

Page 5: ... 11 Chapter 2 Installation 13 2 1 General 13 2 2 Site Preparations 13 2 3 Mechanical Assembly 13 2 4 Electrical Installation 13 2 5 DIP Switches and Jumper Settings 16 2 6 Rack Mount Installation 18 Chapter 3 Operation 21 3 1 General 21 3 2 Controls and Indicators 21 3 3 Operating Procedure 23 Chapter 4 Test Diagnostics 25 4 1 General 25 4 2 Loop Back Tests 25 4 3 Bit Error Rate Tester 25 4 4 Loca...

Page 6: ...ng EOe 1 31 A 1 DIP SW1 Bridge Ethernet and WAN Speed 31 A 2 DIP SW2 Memory Config and E1 Settings 32 Appendix B Interface Connections 33 B 1 E1 Line Connectors 33 B 2 E1 Line Frame Ground 34 B 3 Ethernet RJ 45 Connector 34 Technical Inquiry Form ...

Page 7: ...nsport Ethernet packets across the WAN and supports 10 100 auto negotiation or manual settings for 10M 100M Full or Half Duplex Ethernet The Ethernet port also supports a standard auto MDIX feature that will completely eliminate Ethernet cross over cables or the guessing that is sometimes involved in choosing a cable when connecting to a HUB or a PC The EOe 1 is very easy to configure by using sim...

Page 8: ...l 120 Ohms RJ 48 twisted pair Relative Receive Level 0 to 43dB Pulse Amplitude Nominal 2 37V 10 for 75 ohms Nominal 3 00V 10 for 120 ohms Zero Amplitude 0 1V Transmit Frequency Tracking Internal Timing Loopback Timing 30 ppm 50 ppm Jitter Performance According to ITU T G 823 Complies With ITU T G 703 Interface Connectors BNC unbalanced RJ 48 balanced ...

Page 9: ...rame Auto padding of undersized packets to meet the minimum Ethernet packet size requirement Buffering modes can be selected according to the setting of WAN and LAN line speeds Ethernet interface has automatic Twisted Pair polarity correction Specifications LAN Standard Fully compliant with IEEE 802 3 802 3u Connector Shielded RJ 45 Speeds 10BASE T 100BASE TX Full or Half Duplex Frames Supports 64...

Page 10: ...udes BPV error All ones AIS Link Green Ethernet link is good TD Green Transmit data on Ethernet RD Green Receive data on Ethernet 100 Green Ethernet is 100Base Full Green Ethernet is Full Duplex Error Red Ethernet Bridge Error overflow Error Red Bit Errors received during BERT Test Test Red Loop back and or BERT Test active Physical Height 45 mm 1 3 4 Width 195 mm 7 11 16 Depth 248 mm 9 25 32 Weig...

Page 11: ... 90 250VAC universal AC model 18 72VDC universal DC model Frequency 47 to 63 Hz for AC Power consumption 10 Watts Fuse 0 5A slow blow for AC model no fuse in DC model Environment Temperature 0 50C 32 122F operation Humidity 0 to 90 non condensing ...

Page 12: ...es are alternately transmitted as positive and negative pulse whereas zeros are transmitted as a zero voltage level AMI is not used in most 2 048Mbps transmissions because synchronization loss occurs during long strings of data zeros In the HDB3 format a string of four consecutive zeros is replaced with a substitute string of pulses containing an intentional bipolar violation The HDB3 code substit...

Page 13: ...e EOe 1 supports two E1 line codes AMI coding HDB3 coding E1 framing formats The EOe 1 supports only Unframed E1 format WAN data rates The EOe 1 supports WAN channel rates of 2 048M 1 024M 512K 256K 128K 64K 32K and 16Kbps and is hardwired to a synchronous Ethernet Bridge ...

Page 14: ...d E1 link data signal The source of the EOe 1 E1 link transmit clock can be selected by the user E1 Link Transmit Timing Settings Recovery loop back timing The EOe 1 E1 link transmit clock is locked to the recovered receive clock This is usually the timing mode selected for network operation Figure 1 1 Recovery timing Ethernet Bridge 10 100Base DSU E1 E1 transceiver Clock Mode 0 Recovery TX RX ...

Page 15: ...k oscillator This timing mode is necessary in point to point applications over leased line In this case one EOe 1 must use the internal oscillator while the other must operate from the recovered clock Figure 1 2 Internal Timing Ethernet Bridge 10 100Base DSU E1 E1 transceiver Clock Mode 1 Internal OSC RX TX ...

Page 16: ...vides an approximate operating range up to 2km using 22AWG twisted pairs The EOe 1 also fully meets other E1 specifications including ITU T G 823 for jitter The EOe 1 is capable of performing local and remote loop back The operator at either end of the line may test both the EOe 1 and the line in the loop back mode The loop back is controlled by a manual push button switch A front panel switch gen...

Page 17: ...cation the EOe 1 is connected in a point to point application In this case one EOe 1 s timing should be set to Internal Oscillator while the other should be set to Recovery Figure 1 3 LAN to LAN with EOe 1 Ethernet over E1 In the following application the EOe 1 is connected in an E1 network application In this case both EOe 1 s timing should be set to Recover their timing from the E1 network Figur...

Page 18: ...Chapter 1 Introduction 12 This page left blank intentionally ...

Page 19: ...nits connect via terminal block connection Allow at least 10 cm 4 inch clearance at the rear of the EOe 1 for signal lines and interface cables 2 3 Mechanical Assembly The EOe 1 is designed for tabletop or bench installation and is delivered completely assembled No provisions are made for bolting the EOe 1 to the tabletop 2 4 Electrical Installation Power connection AC power is supplied to the EOe...

Page 20: ...t use repaired fuses or short circuit the fuse holder The power cable must be disconnected before removing or replacing fuses Rear panel connectors The interface connectors located on the rear panel of the EOe 1 Refer to Figure 2 1 incorporate two BNC Coax and two RJ 45 connectors Appendix B provides detailed information on the interface connectors Figure 2 1 EOe 1 rear panel AC DC ...

Page 21: ...Sleeve TRING Transmit data out Rx Center RTIP Receive data in Rx Sleeve RRING Receive data in RJ 45 E1 Connector The pin assignment for the RJ 45 connector is as follows Pin Function 4 TTIP Transmit data out 5 TRING Transmit data out 1 RTIP Receive data in 2 RRING Receive data in RJ 45 Ethernet Connector MDI MDI X 1 Tx 1 Rx 2 Tx 2 Rx 3 Rx 3 Tx 6 Rx 6 Tx ...

Page 22: ...ment is only permitted by authorized and qualified service personnel Procedure a Turn power OFF Disconnect the power cord from the AC outlet b Loosen the screws at the left right of the rear panel c Remove the PCB d Adjust the DIP switches and jumpers as required according to table 2 1 Appendix A describes the DIP switches function in detail e Replace the PCB and tighten the screw ...

Page 23: ...Reserved 11 Sets E1 Line Termination On 75 Ohms or Off 120 Ohms DIPSW2 7 8 120 Ohms Note 1 When MAC filtering is disabled the Bridge becomes an Ethernet repeater Filtering enabled is the default mode for Bridging However the units are shipped with their configuration switch set for repeater mode Note 2 When the Ethernet negotiation is set to auto the settings for speed and duplex are ignored For l...

Page 24: ...s in tandem full space In either situation one standard rack unit space is required Each rack mount kit provides all the necessary hardware for a complete installation Figure 2 2 Rack Mount Installation ETU01 SS In single unit installations the unit may be placed in the left or right side position simply by reversing the rack mounting brackets The kit includes one 1 short and one 1 long rack adapt...

Page 25: ...to the following drawing examples for this application Figure 2 3 Tandem Units Mounting Exploded Figure 2 4 Tandem Units Mounting Detail The tandem kit includes two 2 rack mount brackets one 1 each of inner and outer central mounting brackets twenty 20 3x8mm self tapping screws and four 4 12 24x0 5 screws ...

Page 26: ...Chapter 2 Installation 20 This page left blank intentionally ...

Page 27: ... completed and checked before attempting to operate the EOe 1 3 2 Controls and Indicators All controls push button switches and LED indicators are located on the EOe 1 front panel Depress a push button to activate turn ON the corresponding control Release the push button to deactivate turn OFF the control The function of each push button and indicator is described in Table 3 1 and Table 3 2 Figure...

Page 28: ...Oe 1 to send and receive a 511 test pattern If errors are encountered the Error LED indicator lights for each received error Table 3 2 LED indicators Power Green Power Signal Loss Red E1 link signal loss Alarm Red E1 link alarms BPV All ones AIS Link Green Ethernet link is good TD Green Transmit data on Ethernet RD Green Receive data on Ethernet 100 Green Ethernet is 100Base Full Green Ethernet is...

Page 29: ... when its AC power cord or central office DC power is connected to an AC power outlet or the DC input connections and the power switch is turned to the ON position The Power LED indicator will light indicating that the EOe 1 is on Verify the EOe 1 is in operation by checking that the front panel LED s match the following indicator conditions Power ON Signal Loss OFF Alarm OFF Link ON TD ON OFF or ...

Page 30: ...er 3 Operation 24 Refer to Chapter 4 for the operation of the front panel push button switches Their usage is explained under the Loop Back Tests on page 25 The rest of this page was left blank intentionally ...

Page 31: ...sure that all units are turned on connected properly and are configured correctly 4 3 Bit Error Rate Tester When depressing the Pattern push button switch the Bit Error Rate Tester BERT can be activated in which the test pattern transmitted is received by another EOe 1 see Figure 4 1 When used opposite another EOe 1 with the Pattern push button switch depressed and transmitting the same pattern V ...

Page 32: ...Chapter 4 Test Diagnostics 26 In this example both units at the ends of the E1 link have their pattern generators enabled Figure 4 1 BERT operation ...

Page 33: ...s test is activated by depressing the Local Loopbk button This test checks the performance of the EOe 1 and the connections between them This test consists of looping the receive E1 signal back to the remote EOe 1 see Figure 4 2 Figure 4 2 Local loop back ...

Page 34: ...ing lines The remote digital loop back test consists of providing a loop back at the remote EOe 1 see Figure 4 3 A system test may be performed by first depressing the remote loop back switch then depressing the pattern switch The test pattern will be generated sent out the E1 link and looped back by the remote unit If no errors are indicated by the error LED the link test has been successful Figu...

Page 35: ... Press the Pattern switch The E1 Tx and Rx circuits will be tested The E1 signal loss and alarm LEDs should be off and no test errors should result on the error LED Disconnect the Coax cable momentarily The signal loss alarm and error LEDs should all light Reconnect the cable and they should all go out This test may also be performed on the RJ 48 by making a loop back plug Figure 4 4 Standalone BE...

Page 36: ...e T equipment settings to Half Duplex A wrong setting will result in extremely poor performance on the LAN connection Here it should be noted that a good link indication does not necessarily mean the duplex setting is correct Additionally there is 100Base TX equipment which also does not support Full Duplex Ethernet Equipment may not link or the performance could be poor if the Ethernet is imprope...

Page 37: ...uplex 1 Ethernet Half Duplex ignored in auto 5 0 100Base TX speed 1 10Base T speed 6 7 8 WAN Speed 0 0 0 WAN Speed 2048Kbps 1 0 0 WAN Speed 1024Kbps 0 1 0 WAN Speed 512Kbps 6 7 8 1 1 0 WAN Speed 256Kbps 0 0 1 WAN Speed 128Kbps 1 0 1 WAN Speed 64Kbps 0 1 1 WAN Speed 32Kbps 1 1 1 WAN Speed 16Kbps Table A 1 DIP SW1 Bridge Ethernet and WAN Speed Settings Note 1 0 is equal to a switch setting of OFF wh...

Page 38: ... 170 packets WAN to LAN 170 packets 0 1 Memory Buffer LAN to WAN 32 packets WAN to LAN 308 packets 1 1 Reserved 3 0 E1 Tx Timing Recovery 1 E1 Tx Timing Int Osc 4 0 E1 Line Code HDB3 1 E1 Line Code AMI 5 0 Reserved 1 Reserved 6 0 Reserved 1 Reserved 7 8 E1 Line Impedance 7 8 0 0 120 Ohms 1 1 75 Ohms Table A 2 DIP SW2 Memory Configuration and E1 Settings Note 1 0 is equal to a switch setting of OFF...

Page 39: ... RX Sleeve RRING Signal return Table B 1 E1 BNC connector pin allocation RJ 45 connector definition Designation Pin Direction Function Description TTIP 4 From EOe 1 Transmit data TRING 5 From EOe 1 Transmit data FG 7 Frame ground2 RTIP 1 To EOe 1 Receive data RRING 2 To EOe 1 Receive data FG 8 Frame ground2 Table B 2 E1 RJ 45 connector pin allocation 2 Frame Ground is connected by default To disab...

Page 40: ...jumper on the JP1 header located close to the RJ 45 E1 connector Signal line frame ground should only be connected at one end of the E1 line to avoid ground loops and ground potential differences between the each end of the line Figure B 1 Frame Ground Connection B 3 Ethernet RJ 45 Connector MDI MDI X 1 Tx 1 Rx 2 Tx 2 Rx 3 Rx 3 Tx 6 Rx 6 Tx Note Ethernet does not use pins 4 5 7 8 ...

Page 41: ...nologies Inc Attn Customer Support Department From Company Name Tel Fax MODEL EOe 1 ACTIVITY As attached in DIP switch setting table next page System Configuration Drawing Question Fax 886 2 27991355 Tel 886 2 26591021 E mail info ctcu com ...

Page 42: ...estion SW NO DIP Function Description ON OFF ON OFF 1 MAC address filtering 2 802 3x Flow Control 3 Ethernet Auto negotiation 4 10M 100M Speed 5 Half Full Duplex 6 WAN Speed 7 WAN Speed SW1 8 WAN Speed 1 Memory Buffer Configuration 2 Memory Buffer Configuration 3 E1 Tx Timing source 4 E1 Line Code 5 Reserved 6 Reserved 7 E1 Line Impedance SW2 8 E1 Line Impedance Please include any additional comme...

Page 43: ......

Page 44: ...CTC Union Technologies Co Ltd Far Eastern Vienna Building Neihu Technology Park 8F No 60 ZhouZi St Neihu Taipei Taiwan Phone 886 2 2659 1021 Fax 886 2 2799 1355 E mail info ctcu com http www ctcu com ...

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