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11

CHAPTER 3: Configuration

Switches S1-1 and S1-2: Clock Source

The setting for Switches S1-1 and S1-2 determines the source of the HSSI
Terminal Timing (TT). With Switch S1-1 On and S1-2 Off, the IC946A derives
the HSSI Terminal Timing from the ST signal provided by the HSSI DCE.
With Switch S1-1 Off, and S1-2 On, the V.35 DTE provides TT to the HSSI
DCE.

S1-1

S1-2

Description

Off

Off

Not a Valid Setting

Off

On

Terminal Timing Supplied by V.35 DTE device

On

Off

Terminal Timing supplied by HSSI ST signal

On

On

Not a Valid Setting

Switches S1-3 and S1-4: Synchronization Method

Switches S1-3 and S1-4 allow the IC946A to compensate for timing delays
when transmitting HSSI data at high speeds (greater than 2.5 Mbps). At high
bit rates, set Switch S1-3 On and Switch S1-4 Off. In this setting, the V.35 data
will be synchronized to the SD timing signal before conversion to HSSI. At
lower bit rates (less than 2.5 Mbps), set Switch S1-3 Off and S1-4 On. In this
setting, the V.35 data bypasses the synchronization circuit and is passed
straight through to the HSSI DCE.

S1-3

S1-4

Description

Off

Off

Not a Valid Setting

Off

On

Data Skips Sync Circuit

On

Off

Data passes through sync circuit.

On

On

Not a Valid Setting 

Содержание IC945A

Страница 1: ... FREE technical support 24 hours 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 MAY 1998 IC945A IC946A V 35 HSSI Interface Converters V 35 to HSSI Interface Converter ...

Страница 2: ...erated 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 measures may be necessary 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 dig...

Страница 3: ... El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante 8 Servicio El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación Todo otro servicio deberá ser referido a personal de servicio calificado 9 El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso La...

Страница 4: ...r una antena externa deberá ser localizada lejos de las lineas de energia 16 El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de tiempo 17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u orificios de ventilación 18 Servicio por personal calificado deberá ser provisto cuando A El cable de poder o ...

Страница 5: ...indicates that it is in compliance with the Electromagnetic Compatibility EMC directive and the Low Voltage Directive LVD of the Union European EU TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners ...

Страница 6: ...tion Switches in the IC946A 9 3 2 Configuration Switches in the IC945A 12 4 Installation 15 4 1 IC946A 15 4 2 IC945A 15 4 3 AC Power Connection 16 4 4 DC Power Connection 16 5 Operation 17 5 1 Back Panel LEDs 17 5 2 Test Modes 17 5 2 1 Local Loopback LL 19 5 2 2 Remote Digital Loopback RL 19 Appendix A Pinouts 21 Appendix B Block Diagrams 24 ...

Страница 7: ...50 Slimline male 1 M 34 male Loopbacks Local and Remote Clocking All HSSI co directional timing patterns are supported Cable 6 feet 1 8 m Compliance FCC Class A IEC CE emissions Approval CE EMC Directive EN 50082 1 Temperature Range 32 to 122 F 0 to 50 C Humidity Range 5 to 95 noncondensing Max Altitude Up to 15 000 feet 4572 m Power Unit will require an external desktop power supply 100 240 VAC S...

Страница 8: ...A lets a V 35 DTE device communicate with an HSSI DCE device The IC945A lets a V 35 DCE device communicate with an HSSI DTE device Both versions are equipped with a male M 34 connector on the converter end and a male HD50 on the end of a 6 foot 1 8 m cable Power is supplied to the Converter by an external desktop AC transformer 2 2 Features Bi directionally converts V 35 to HSSI Supports synchrono...

Страница 9: ... in Figure 3 1 Figure 3 1 Use a small screwdriver to open the case Twist the screwdriver head slightly and the top half of the case will separate from the lower half You now have access to the internal switches used to configure the unit After opening the case please refer to Section 3 1 if you purchased the IC946A and Section 3 2 if you purchased the IC945A To close the case fit the 2 halves toge...

Страница 10: ...nterface converter is factory configured as DCE on the V 35 end and DTE on the HSSI end Therefore the V 35 end wants to connect to DTE and the HSSI end wants to connect to DCE Please follow the instructions in this section to configure the internal DIP switches so that the unit will work properly in your application Figure 3 2 shows the position of Switch S1 on the top side of the PC board Figure ...

Страница 11: ...t settings for DIP Switch S1 are shown in Table 3 1 Detailed descriptions of each switch follow the table Figure 3 3 Closeup of the DIP switches Table 3 1 DIP switch summary Position Function Factory Default S1 1 Clock Source On HSSI ST S1 2 Clock Source Off Signal S1 3 Sync Method Off Bypass S1 4 Sync Method On Sync Circuit 1 2 3 4 ON OFF ON ...

Страница 12: ...al On On Not a Valid Setting Switches S1 3 and S1 4 Synchronization Method Switches S1 3 and S1 4 allow the IC946A to compensate for timing delays when transmitting HSSI data at high speeds greater than 2 5 Mbps At high bit rates set Switch S1 3 On and Switch S1 4 Off In this setting the V 35 data will be synchronized to the SD timing signal before conversion to HSSI At lower bit rates less than 2...

Страница 13: ... and the HSSI end wants to connect to DTE Please follow the instructions in this section to configure the internal DIP switches so that the unit will work properly in your application Figure 3 4 shows the position of Switch S1 on the top side of the PC board Figure 3 4 The IC945A Figure 3 5 shows the orientation of the Switches on DIP Switch S1 with respect to ON OFF positions The default settings...

Страница 14: ... allow the IC945A to generate a HSSI gapped clock Gapped clocking is a method of flow control in which data flow is interrupted by an idle gapped clock signal In this mode the IC945A will gap the ST clock to the HSSI DTE whenever the V 35 CTS signal is de asserted In the No Gapped Clock setting the V 35 clock passes through with only a level change S1 1 S1 2 Description Off Off Not a Valid Setting...

Страница 15: ... Switch S1 4 Off In this setting the V 35 data signals will be synchronized to the SD timing signal before conversion to HSSI At lower bit rates less than 2 5 Mbps set Switch S1 3 Off and S1 4 On In this setting the V 35 data bypasses the synchronization circuit and is passed straight through to the HSSI DTE S1 3 S1 4 Description Off Off Not a Valid Setting Off On Data Skips Sync Circuit On Off Da...

Страница 16: ...gure 4 1 illustrates the proper connection of the IC946A Figure 4 1 A common V 35 DTE to HSSI DCE installation 4 2 IC945A The IC945A is designed to connect a V 35 DCE device to an HSSI DTE device In this application the M 34 V 35 and HD50 HSSI male connectors of the IC945A may connect directly to their respective equipment ports or they may connect via a short straight through cable see Appendix A...

Страница 17: ...y a power cord for the power entry The V 35 HSSI Interface Converter is powered up as soon as it is plugged into an AC outlet there is no power switch 4 4 DC Power Connection You may bypass the DC wall adapter and supply DC power directly to the V 35 HSSI Interface Converter power supply jack DC power supplied must be 5 VDC 5 1A minimum center positive and can be supplied via a barrel type plug wi...

Страница 18: ...as two LEDs on the back panel see Figure 5 1 Figure 5 1 The rear panel Status Lit green to show that both DTR from the DTE device and DSR from the DCE device are active This LED will not light whenever one of the two signals is inactive Test Mode Lit red to show that either one or both of the test modes is active See Section 5 2 for a description of the test modes Test Mode LED Status LED HSSI Cab...

Страница 19: ...ion of the communication links These modes Local Loopback LL and Remote Loopback RL are always initiated by the signals on the DTE device see Figure 5 2 NOTE HSSI supports a third loopback mode Local Digital Loopback LDL However V 35 does not support this mode Figure 5 2 Local and remote loopback modes DTE LL V 35 HSSI Interface Converter RL DCE DCE ...

Страница 20: ...terface if the HSSI device is the DTE The test LED should be lit C Perform a BER bit error rate test from the DTE If the test indicates no fault deactivate LL and proceed as normal 5 2 2 REMOTE DIGITAL LOOPBACK RL The Remote Loopback RL test checks the performance of the link between the DTE device and the DCE as well as the link between the local and remote DCE devices Any characters sent from th...

Страница 21: ... the Local Loopback test was successful you may have a problem with the cable between the DCE devices NOTE The V 35 HSSI Interface Converter simply converts and passes the data through the communication link The DCEs must be configured to perform to the appropriate loopback diagnostic ...

Страница 22: ...eserved for Future Use 30 Reserved for Future Use 6 ST Send Timing A DCE Source 31 ST Send Timing B DCE Source 7 Reserved for Future Use 32 Reserved for Future Use 8 DTR DTE Ready A 33 DTR DTE Ready B 9 TT Terminal Timing A DTE Source 34 TT Terminal Timing B DTE Source 10 LA Loopback A A 35 LA Loopback A B 11 SD Send Data A 36 SD Send Data B 12 LB Loopback B A 37 LB Loopback B B 13 Reserved for Fu...

Страница 23: ...est Mode Indication B 25 SGND Signal Ground 50 SGND Signal Ground V 35 Interface M 34 Connector V 35 DCE or DTE Pin Signal A FGND Frame Ground B SGND Signal Ground C RTS Request to Send D CTS Clear to Send E DSR Data Set Ready F CD Carrier Detect H DTR Data Terminal Ready L LL Local Loopback M TM Test Mode N RL Remote Loopback P TD Transmit Data R RD Receive Data S TD Transmit Data B T RD Receive ...

Страница 24: ...23 APPENDIX A Pinouts V 35 Interface continued Pin Signal W TT Terminal Timing B X RT Receive Timing B Y ST Send Timing A AA ST Send Timing B ...

Страница 25: ... 2 IC945A DTR DSR ST SD RT RD LL RL TM CD RTS CTS V 35 DTE HSSI DCE LEVEL CHANGE TA CA ST SD RT RD LA LB TM ENABLE SYNC CIRCUIT S1 3 S1 4 S1 2 S1 1 5V DSR DTR ST RT RD LL RL TM CD CTS V 35 DCE HSSI DTE LEVEL CHANGE CA TA ST RT RD LA LB TM SYNC CIRCUIT S1 3 S1 4 S1 2 S1 1 TD SD TT TT RTS ...

Страница 26: ...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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