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Black Box MT1000A-13 User Manual Download Page 39

T1 AND E1 FIBER MUXES

38

Figure 6-4. T1 or E1 local loopback in the remote mux. 

6.1.3 F

IBER

O

PTIC

R

EMOTE

L

OOPBACK

When the fiber optic remote loopback is activated (remote loopback is configured from the Special Actions
menu), the remote channel interfaces return the received signal via the transmit path of the channel.
Simultaneously, the remote mux sends an unformed all-ones signal to all of the channels. Figure 6-5 shows the
fiber optic remote loopback connection.

Figure 6-5. Fiber optic remote loopback. 

When the link remote loopback is activated, the equipment connected to the local mux’s channel must receive
its own transmission. This test checks the operation of the local and remote units and the transmission plant
connecting the two units.

Summary of Contents for MT1000A-13

Page 1: ...ours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com CUSTOMER...

Page 2: ...is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever m...

Page 3: ...e aire por los orificios de ventilaci n 10 El equipo el ctrico deber ser situado fuera del alcance de fuentes de calor como radiadores registros de calor estufas u otros aparatos incluyendo amplificad...

Page 4: ...drive current Do not use broken or unterminated fiber optic cables connectors or look straight at the laser beam Using optical devices with this equipment will increase the risk of eye injury Perform...

Page 5: ...ent Requirements 14 3 3 Additional Equipment Needed 14 3 4 Setting the Internal Jumpers and Switches 14 3 5 Making Connections 19 3 5 1 Connector Location 19 3 5 2 Connecting the Channels on T1 Versio...

Page 6: ...the Remote Mux 30 5 3 4 Invoking Special Actions 31 5 3 5 Setting Resetting the T1 or E1 Remote Loopback 32 5 3 6 Resetting to the Default Configuration 32 5 4 Changing the Password 33 5 5 Viewing Har...

Page 7: ...See Table 2 1 Connectors 1 pair ST Supervisor Port Specifications All Models Control DTE Interface V 24 RS 232 asynchronous Control DTE Connectors 1 DB9 F Control DTE Data Rates 9 6 19 2 38 4 or 57 6...

Page 8: ...ed 75 unbalanced Unbalanced Interface 2 37V 10 Receive Levels 0 to 6 dB Jitter Performance Per ITU T Rec G 823 Connectors Balanced interface 4 RJ 45 Unbalanced interface 2 BNC coax per channel General...

Page 9: ...um range of 48 km 29 8 miles Used in pairs the E1 muxes offer multimode distances of 4 km 2 5 miles with the 850 nm model and single mode distances of 44 km 27 3 with the 1310 nm model Redundant power...

Page 10: ...h descriptions of the service channel test and diagnostic capabilities management and monitoring and power requirements An optional redundant fiber link board for establishing a backup fiber link is a...

Page 11: ...he requirements of ITU T Rec G 703 Each channel port on the E1 models has two line interfaces a 120 ohm balanced line interface terminated in an RJ 45 eight pin connector and a 75 ohm unbalanced inter...

Page 12: ...able the alarm indications related to the unused channels The response to alarm conditions is as follows The detection of loss of fiber input signal the reception of AIS on the fiber input or loss of...

Page 13: ...will see SNMP management listed in the software s main menu However the parameters for setting up an SNMP based system are reserved for future use 2 3 6 POWER REQUIREMENTS The T1 or E1 Fiber Mux incl...

Page 14: ...ation and maintenance 3 2 Site Requirements and Prerequisites 3 2 1 POWER The mux should be installed within 5 feet 1 5 m of an easily accessible grounded AC outlet capable of furnishing a supply volt...

Page 15: ...ches WARNING This product includes Class A or Class 1 lasers For your safety Do not look directly into the optical connectors while the multiplexor is operating Remember that the T1 or E1 Fiber Mux st...

Page 16: ...ware of the hazard involved Capacitors inside the instrument may still be charged even after the instrument has been disconnected from its source of supply CAUTION The mux contains components sensitiv...

Page 17: ...nd no indication is generated in case of an alarm condition on that channel ON The alarms generated by the corresponding channel are processed JP26 Controls the operation of the voice OFF The service...

Page 18: ...11 JP15 JP19 for Channel 2 JP2 JP6 JP10 JP14 JP18 for Channel 3 JP1 JP5 JP9 JP13 JP17 for Channel 4 The type of interface can be independently selected for each channel but all jumpers serving a given...

Page 19: ...et to FLASH and OFF V Agent updated version of the FLASH memory downloading of a new version is possible when a malfunction occurs in the ON The V Agent is set to default version normal download proce...

Page 20: ...o the RJ 45 connectors designated CH1 CH2 CH3 or CH4 3 When using the unbalanced interface connect to the two BNC connectors designated IN transmit input and OUT receive output of the appropriate inte...

Page 21: ...required current rate as marked on the mux s rear panel are used for replacement The use of repaired fuses and the short circuiting of fuse holders is forbidden Whenever it is likely that the protecti...

Page 22: ...A indicator Off when the main power supply is not powered Lights in green when the main power supply is turned on and operates normally Lights in red when the main power supply is turned on and a malf...

Page 23: ...nstalled indicator lights when Force Backup Link is activated and is off in normal operation mode 11 AIS MAIN indicator Lights when the AIS signal is received on the main fiber optic link 12 AIS BACKU...

Page 24: ...ng normal operation The POWER indicators of the active power supply sources light in green The MAIN indicator lights on However if you are using the mux with the optional dual fiber link board install...

Page 25: ...our screen press Enter at least four times and a press the dot key The dots crossing the screen should last for a period of 5 seconds Pressing the dot key once as instructed above sets the parity and...

Page 26: ...time type the fibermux default password an asterisk appears on the screen after each typed character and press Enter The Main Fibermux menu appears see Figure 5 2 MAIN FIBERMUX MENU 0 Exit 1 Status 2...

Page 27: ...optic interfaces Interface Status and the status of the mux s functional blocks Internal Status 5 2 1 T1 OR E1 AND FIBER OPTIC INTERFACE STATUS 1 In the Main Fibermux menu Figure 5 2 choose option 1 S...

Page 28: ...are replaced by E1 or E2 and status monitoring for the T2 backup or E2 backup on E2 versions is only available if you add the optional dual fiber link board to the mux 3 Select 0 Exit to return to th...

Page 29: ...or E1 and fiber optic interfaces whether the interfaces are in the normal mode or in the looped mode Set local loop connections in the local mux at both T1 or E1 and fiber optic interfaces Set local...

Page 30: ...is connected in the local or remote mux see Figure 5 8 VIEW INTERFACE CONFIGURATION Interface Local Remote T1 channel 1 Normal Normal T1 channel 2 Normal Normal T1 channel 3 Normal Normal T1 channel...

Page 31: ...is option is available only if the optional dual fiber link board is installed 2 Choose option 1 Interface 3 Select a digit between 1 and 4 to set reset a local loopback in one of the T1 or E1 interfa...

Page 32: ...eversible To remove this loopback connect a terminal to the remote unit or shut down the power to the remote unit 3 Select a digit between 1 and 4 to set reset a local loopback in one of the T1 or E1...

Page 33: ...Normal and Backup options are only available on muxes that have the optional dual fiber link board installed 5 3 5 SETTING RESETTING THE T1 OR E1 REMOTE LOOPBACK 1 In the Configuration screen choose o...

Page 34: ...ge the current password 1 Choose option 3 Password management from the Main Fibermux menu The Password Management screen appears see Figure 5 13 PASSWORD MANAGEMENT 0 Exit 1 Set new monitor password E...

Page 35: ...Downloading Software To download a new software revision 1 In the Main Fibermux menu choose option 5 Software download The Software Downloading screen appears see Figure 5 15 SOFTWARE DOWNLOADING 0 Ex...

Page 36: ...e local mux The T1 or E1 local loopback returns the T1 or E1 transmit signal to the output of the receive path Figure 6 1 This test checks the operation of the connections to the equipment attached to...

Page 37: ...T1 AND E1 FIBER MUXES 36 Figure 6 1 T1 or E1 local loopback in the local mux Figure 6 2 Fiber optic link local loopback in the local mux...

Page 38: ...onnection When the fiber optic link remote loopback is activated the equipment connected to the remote unit channel must receive its own transmission This test checks the operation of the remote unit...

Page 39: ...signal via the transmit path of the channel Simultaneously the remote mux sends an unformed all ones signal to all of the channels Figure 6 5 shows the fiber optic remote loopback connection Figure 6...

Page 40: ...e local loopback on the mux Check that the SYNC LOSS and AIS indicators of the fiber optic link in use turn OFF If the indicators turn OFF check the fiber optic interface connections the fiber optic t...

Page 41: ...ew flash version again Set switch SW1 1 to OFF and reset the unit 6 3 Calling Black Box If you determine that your T1 or E1 Fiber Mux is malfunctioning do not attempt to alter or repair the unit It co...

Page 42: ...Pin Designation Direction Function 1 RD R Input Receive Data ring 2 RD T Input Receive Data tip 3 FG Frame Ground 4 TD R Output Transmit Data ring 5 TD T Output Transmit Data tip 6 FG Frame Ground 7 8...

Page 43: ...From the mux 2 Receive Data RD To the mux 3 Transmit Data TD From the mux 4 Data Terminal Ready DTR To the mux 5 Signal Ground SIG Common signal reference and DC power supply ground 6 Not connected 7...

Page 44: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 2003 Black Box Corporation All rights reserved...

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