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4

V.35 FOLD

Speed —

2.4 to 256 Kbps

Interface — 

Terminal:

V.35 DCE

Line:

Multimode fiberoptic, graded index

Pins Supported —

V.35:

CTS, DCD, DSR, ETCA, ETCB, FG, RCA, RCB,
RDA, RDB, RTS, SG, TCA, TCB, TDA, TDB

Fiberoptic:

TX, RX

Range —

2.3 km (1.4 miles) with 100µ, -5dB/km fiber
optic cable;
1.5 km (0.9 miles) with 62.5µ , -5dB/km fiber
optic cable;

Connectors —

(2) fiberoptic:  SMA (905) female or ST
female;
(1) DB25S (25-pin sub D female) pinned per
EIA530A.  A DB25-to-V.35 (female M-block)
adapter cable is included.

Fiber Optic Characteristics:

Wavelength —

820nM

Receiver Sensitivity —

-21.7dB

Launch Power —

-10.1 dB into 100µ cable

(typical)

-14.1 dB into 62.5µ cable
-19.6 dB into 50µ cable

Operation —

Point-to-point

Mode —

Full or half-duplex; synchronous

Clocking — 

Internal, external, or recovered

Carrier — 

Constant or Switched

1. Specifications

Содержание ME522A-SM

Страница 1: ...nical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com FEBRUARY 1998 ME522A ST ME522AE ST ME522A SM ME522AE SM V 35 FOLD ST V 35 FOLD SM V 35 FOLD RTS CD TD RD PWR DLB TEST ...

Страница 2: ... area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment This digital apparatus does not exceed the Class A limits for Radio noise emission from ...

Страница 3: ... CTS Delay 10 3 6 Full or Half Duplex Operation 11 3 7 Final Installation Procedures 11 4 Monitoring Operation 12 5 Diagnostics and Troubleshooting 13 5 1 Simple Problems 13 5 2 Diagnostic Tests 13 5 3 Troubleshooting 14 6 Fiberoptic Considerations 15 6 1 Link Distance 15 6 2 Handling Fiber Optic Cable 15 Appendix A V 35 Pin Assignments 16 Appendix B Tail Circuit Applications 17 Contents ...

Страница 4: ...B km fiber optic cable Connectors 2 fiberoptic SMA 905 female or ST female 1 DB25S 25 pin sub D female pinned per EIA530A A DB25 to V 35 female M block adapter cable is included Fiber Optic Characteristics Wavelength 820nM Receiver Sensitivity 21 7dB Launch Power 10 1 dB into 100µ cable typical 14 1 dB into 62 5µ cable 19 6 dB into 50µ cable Operation Point to point Mode Full or half duplex synchr...

Страница 5: ... Storage Temperature 4 to 158 F 20 to 70 C Humidity 15 to 90 relative humidity noncondensing Mean Time Between Failures approximately 100 000 hours Power Wallmount transformer 115 VAC 60 Hz 8VA or 230 VAC 50 Hz 8VA Size Standalone 1 8 H x 5 5 W x 8 5 D 4 6 cm x 14 0 cm x 21 6 cm Rackmount 4 7 W x 7 4 D 11 9 x 18 8 cm Weight Standalone 1 5 lb 0 7 kg Unit and transformer 2 2 lb 1 0 kg Rackmount 0 5 ...

Страница 6: ...y on the V 35 interface only CD indicates that there is a carrier signal on the RX fiberoptic connector Two pushbuttons on the front panel TST and DLB make diagnostics easy to use Internal switches or jumpers determine these characteristics Speed Carrier constant or switched with selectable RTS CTS delay Operation full or half duplex TX data clock select Your FOLD package should include the base u...

Страница 7: ...by might be quite warm This is normal because of power dissipated in V 35 transmission Important Both V 35 devices and both V 35 FOLDs must be set to the same speed 3 Installation and Configuration Table 1 DIP Bank Speed Settings Bank Switch Speed in Kbps 2 4 4 8 9 6 19 2 38 4 56 64 112 128 256 4 1 On On On On Off Off Off Off Off Off 4 2 Off On On Off Off Off Off Off Off Off 4 3 Off On Off Off Off...

Страница 8: ...8 V 35 FOLD P1 S3 S4 S5 W3 W2 A B C D E OPEN 1 2 3 4 HALF FULL OPEN 1 2 3 4 O F F 1 2 3 4 5 6 7 8 Figure 2 Circuit Board Layout for the V 35 FOLD ...

Страница 9: ...A and TCB MASTER CLOCK To create a master clock one of the FOLDs should be set to internal or external clocking and the other FOLD set to recovered clock 3 4 Carrier Constant Switched Jumper W2 is used to select Constant Carrier or Switched Mode See Figure 2 for the jumper s location on the printed circuit board This option determines how the FOLD reacts to an RTS signal from the local V 35 device...

Страница 10: ...s CD indicator will also light indicating that a transmission link has been established Once the local V 35 device drops RTS the local RTS and remote CD indicators will go out 3 5 RTS CTS Delay In Switched mode you may insert a delay after the V 35 device raises RTS This will delay the return of CTS from the FOLD to the V 35 device This feature is useful in applications that require time for the r...

Страница 11: ...ures Replace the top cover Replace the screw Connect your fiberoptic cable to the V 35 FOLD When using SMA connectors tighten the connection with your fingers and then stop Do not over tighten Connect the DB25 to female M block connector to the V 35 FOLD Connect the other end to your V 35 device Plug the power supply into an AC outlet The V 35 FOLD is now ready for operation Figure 3 The rear pane...

Страница 12: ...smission In Constant Carrier mode the RTS LED will always be on In Switched mode the RTS LED will be on only if RTS is asserted CD Indicates the presence of carrier signal at the RX fiberoptic connector If the remote V 35 FOLD is in Constant Carrier Mode the local V 35 FOLD s CD LED will always be on If the remote V 35 FOLD is in Switched Mode the local V 35 FOLD s CD LED will light when the remot...

Страница 13: ...remote V 35 FOLD is correctly receiving and decoding the null data If you press the TST button on both the local and remote FOLDs both RD indicators should go off This ensures that both directions of the link are in working order The RD indicator may flash before switching off entirely This is normal If the RD indicator remains lit or flickers see Section 5 3 Troubleshooting DLB Press the DLB push...

Страница 14: ...hing The TX connector of the local FOLD should be attached to the RX connector of the remote FOLD Conversely the RX connector of the local FOLD should be attached to the TX connector of the remote FOLD Maximum Link Distance Check the specifications to make sure that the fiberoptic cable you are running between the two FOLDs has not exceeded the operating range Damaged Fiberoptic Cable If one direc...

Страница 15: ...he quality of the fiber itself connectors and the terminus connections 6 2 Handling Fiber Optic Cable Treat connectors the same as a fine camera lens Clean the connectors with lens cleaning tissue before installing them Keep connectors covered with not installed Never use the connectors to pull fiberoptic cable through conduits Do not pull fiberoptic cable tightly around a corner This can cut tran...

Страница 16: ...t TCA 15 Y TCB 12 AA Received data Out RDA 3 R RDB 16 T Remote TX clock In ETCA 24 U ETCB 11 W Signal Detect Out DCD 8 F Request to Send In RTS 4 C Clear to Send Out CTS 5 D Signal Ground In Out SG 7 or 23 B Protective Ground In Out FG 1 A Data Set Ready Out DSR 6 E RX Data Clock Out RCA 17 V RCB 9 X RX data clock Out RCA 17 V RCB 9 X ...

Страница 17: ... external clock inputs and omits the Transmit clock lines TCA and TCB With TCA and TCB omitted there is no danger of creating a short circuit on those leads and in turn increasing the current that the unit will draw Host CPU Fiberoptic Cable CSU DSU V 35 FOLD V 35 FOLD V 35 Cable EYN450 V 35 Tail Circuit Cable EYN452 CSU DSU Front End Processor DDS Line A A B B C C F F E E H H R R P P T T S S U V ...

Страница 18: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1998 Black Box Corporation All rights reserved ...

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