NEC FD-2240A User Manual Download

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Summary of Contents for FD-2240A

Page 1: ...operating information for the FD 2240A 6 3MB Optical Line Terminating 0 LTM If corrections are required in the attached document use Form 3973 as described in Section 000 010 015 If equipment design...

Page 2: ...1986 FD 2240A 6 3MB OPTICAL LINE TERMINATING MULTIPLEXER OPERATION NEC America Inc Transmission Division 14040 Park Center Road Herndon Virginia 22071 Phone No 703 834 4000 Fax No 703 481 6904 Telex...

Page 3: ...INF Unit MUX Unit PWR Unit SV Unit 6M OPT INF Unit OPERATION A Ma nual Switching B Automatic Switching c DSl Level Remote Loopback D High Speed Remote Loopback E Alarm Cutoff F Alarm Test G Lock Rese...

Page 4: ...WR Unit X0319A B Xl914A Controls and Indicators SV Unit X0315A Indicators 6M OPT INF X0306E F Fl X0307B C Cl Unit Controls and Indicators DSl Level Remote Loopback Configuration High Speed Remote Loop...

Page 5: ...redundant automatic switching function is not available 2 02 After automatic switching occurs the faulty unit can be replaced without interrupting service It is not necessary to repeat the starting pr...

Page 6: ...u M X u X 6 M 0 p T I N F Display Panel rMISC sPARE OCl OC2 ALCP rourn rrn 11 OAl OAl OA1 OA t M D c u M T X u I X L v _ NOTE 1 052 INF Unit may be1 mounted in place of 6M OPT INF 2 Only one unit can...

Page 7: ...ates MAINT switch is ON when lit SOURCE green LEO Indicates presence of DC primary power when lit MAl NT two position toggle switch Enables manual control switching manual switch and remote ioopback s...

Page 8: ...wer when lit MAINT two position toggle switch Enables manual control switching manual sw tch and remote loopback switch I TST momentary action pushbutton switch Lights all equipment LED except ALM uni...

Page 9: ...LEO Indicates minor alarm occurrence in local F0 2240A when lit RErv10TE MAJ red LED Indicates major alarm occurrence in remote FD 2240A when lit REMOTE MIN amber LEO lndieatei minor alarm occurrence...

Page 10: ...C2 fuse for protection switching relays blown One or more units of online system incorrectly equipped Online MUX unit multiplexer circuit failure A 1 __ t u nn T Tl Tt 1 vu ut Ul l VC J l l ti Ull L u...

Page 11: ...2 3 or 4 b Indicates system 1 or 3 FAILURE Offline DS2 INF unit output loss Offline DS2 INF unit input loss rt L T 1 1TTV demultiplexer UI I ce Ul lUA Uil l L circuit failure DSl CH output failure on...

Page 12: ...put loss a DMUX Online DMUX unit demultiplexer cirucit or DSl CH output failure a MAJ ERR Online 6M OPT INF unit major error PWR MIN One PWR unit failure ta MUX urr1 1 ne MUA un1 t ra1 1 ure a OPT OUT...

Page 13: ...301 Table 3 3 Alarm Display Panel Character Displays CHARACTERS LOCAL DISP I CONDITION REMOTE DISP I SCROLL END Scroii mode ends after all failures are displayed NEC FD 2400A Indicates when TST SW is...

Page 14: ...r 4 online NOTE MAINT switch must be set to ON before operat1ng this switch FAIL red LED Indicates unit failure when lit LOCK red LEO Indicates that redundant sw1tch is locked when Itt If high speed i...

Page 15: ...301 CH iGE 7 Indicates un1t IS online when lit FAIL red LEO Indicates unit failure when lit RMT ALM amber LED Indicates that remote alarm is detected when lit LPB DET CH1 thru 4 red LED indicates tha...

Page 16: ...S II 1 rF1l lidJ u ON LINE Green LED Indicates that the unit is on line when lit FALL red LED Indicates unit failure when lit AIS amber LED Indicates that alarm mdtcatton signal IAISl of DS2 1evel is...

Page 17: ...ore setting ALB switch to ON ALM unit MAINT SW must be ON 2 CH NOs corresponding to RLB SWs are CH1 through CH4 from the top 3 Nos 1 through 4 shown at right side of ALB SWs do not indicate CH NOs ON...

Page 18: ...l status NOTE 1 Before setting R LB switch to ON A LM unit MAINT SW must be ON 2 CH NOs corresponding to R LB SWs are CH 1 through CH4 from the top ON LiNE green LED Indicates unit is online when lit...

Page 19: ...OLTAGE MONITOR JACK PWR ON green LED Indicates normal power supply when lit ON OFF two position switch NFB Po AJer ts supplied when ON Voltage Monitor Jack 50 90 To check 5V 9V output voltage t Figure...

Page 20: ...normal power supply when lit ON OFF circuit breaker NFBI Power is supplied when ON Voltage Monitor Jack To check 5V 9V 48V output voltage ISS 3 ECA 365 407 301 CH GE 7 5V Ioo oo 9V 48V Ill 0 Figure 3...

Page 21: ...IL RCV4 FAIL XMT1 FAIL XMT2 FAIL XMT3 FAIL XMT4 FAIL RCV1 to RCV4 FAIL red LED Indicates the corresponding system RCV SV data failure when iit XMT1 to XMT4 FAIL red LED Indicates the corresponding sys...

Page 22: ...can be set to 1 x HT3 1 x 1cr or 1 x 10 s ALB OET red LEO indicates detection of high speed loopback command signal bit from remote station when lit ALB SET red LEO indicates that ALB switch is ON wh...

Page 23: ...from remote station when lit l r __ l 1 ni D I IIJU 1 I IL I Indicates that ALB switch is ON when lit ALB DIP switch ON Sends loopback command at high speed level to remote station when set to ON OFF...

Page 24: ...ing will also be done at remote station Manual switching is controlled by the CTRL unit SEL switch The equipment must first be placed in maintenance mode by setting ALM unit MAINT switch to ON positio...

Page 25: ...unit RCV online monitoring High speed receive bit by bit error detection Low speed output signal loss Low speed channel output failure resulting in 1 544 Mb Is data loss or incorrect stuffing C DSl L...

Page 26: ...RLB SET LED and remote DMUX unit RLB DET LED are lit DMUX unit detects RLB command See Figure 4 1 3 Verify that the signal is looped back and perform signalling test 4 Set MUX unit RLB switch to OFF...

Page 27: ...NECA 365 407 301 Figure 4 1 DS1 Level Remote Loopback Configuration 0 LTM Configuration Page 24...

Page 28: ...I y I I I I i 1 11 I i I DMUX I Ii I l I I I I LJ I I L J ALB COMMAND DETECT ISS 3 NECA 365 407 301 FD 2240A IIMUX l l ON LINE I il I I 1 I l iMux I i 0 I 1 I I I I I I l ___ J Figura 4 2 High Speed R...

Page 29: ...toff ACO switch on the alarm display panel releases CO audible AUD alarms and visual VIS alarms if selected F Alarm Test 4 13 Checking LED indicators on each unit and the alarm display panel except PW...

Page 30: ...oggle switch to ON position LOCK LED goes oute 4 Set MAINT switch to OFF MAINT LED goes out H Character Displays 4 18 The alarm display panel character displays are independently provided so that alar...

Page 31: ...des displays in the following order COM SYS1 SYS2 SYS3 SYS4 If an alarm occurs the scroll starts from the system where alarm occurs and then continues in the above order Scroll displays always indicat...

Page 32: ...ithin 30 msec after stopping the scroll is continued If 5 minutes pass without switch operation the state before the scroll returns 5 STARTING EQUIPMENT 5 01 Use the following procedures to start equi...

Page 33: ...NECA 365 407 301 6 STOPPING EQUIPMENT 6 01 To stop equipment for testing or maintenance set PWR unit ON OFF switches to OFF position Page 30 30 Pages...

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