Cable Specifications   A

  This appendix provides pinout and length information for the following cables used on the PortMaster 4 and specifications for cables used on PortMaster 4 Ethernet interfaces.

•  Modem Cable.  This cable is used to connect a data communication equipment (DCE) device (modem) to the C0 or C1 port. See page A-1.

    This cable is available from most computer equipment suppliers.

•  Console Cable.  Also known as a null-modem cable, this cable is  used to connect a data terminal equipment (DTE) device (terminal) to the C0 port. See page A-2.

    This cable is available from most computer equipment suppliers.

•  RJ-45 Cable.  This cable is  used to connect an Ethernet 10BaseT or 10/100BaseT line to an Ethernet port, or to connect a T1, channelized T1, E1, channelized E1 or ISDN PRI line to a T1 or E1 port. See page A-2.

       Modem Cable

  Table A-1 gives pinout specifications for an RS-232 modem cable with RJ-45 and DB-25 connectors.

  Table A-1 Modem Cable Pinouts

 

PortMaster 4    Serial Port (C0, C1)				PC or Terminal    Serial Port
RJ-45	Name	Definition	Direction	DB-25    (DTE)	Signal
1	RTS	Request to Send	Output	5	CTS
2	DTR	Data Terminal Ready	Output	81	DCD
3	TXD	Transmit Data	Output	3	RXD
4	GND	Signal Ground		NC2
5	GND	Signal Ground		7	GND
6	RXD	Receive Data	Input	2	TXD
7	DCD	Data Carrier Detect	Input	20	DTR
8	CTS	Clear to Send	Input	4	RTS
NC2		Data Set Ready		61	DSR

  Lucent recommends that the length of an RS-232 null-modem cable does not exceed
50 feet (15 meters).

       Console Cable

  Table A-2 gives pinout information for an RS-232 console (null modem) cable with RJ-45 and DB-25 connectors.

  Table A-2 Console Cable Pinouts

 

PortMaster 4    Serial Port (C0, C1)				External Modem
RJ-45	Name	Definition	Direction	DB-25    (DCE)
1	RTS	Request to Send	Output	4
2	DTR	Data Terminal Ready	Output	20
3	TXD	Transmit Data	Output	2
4	GND	Signal Ground		NC1
5	GND	Signal Ground		7
6	RXD	Receive Data	Input	3
7	DCD	Data Carrier Detect	Input	8
8	CTS	Clear to Send	Input	5

  1. Not connected.

  Lucent recommends that the length of an RS-232 straight-through console cable does not exceed 50 feet (15 meters).

       RJ-45 Cable

  Table A-3 shows the pinout specifications for a Category 5 twisted pair cable, as specified by the ANSI/EIA-568-A wiring standard, with an RJ-45 connector--also known as a RJ-48C connector.

  Table A-3 RJ-45 Cable Pinouts 

 

PortMaster 4 Ethernet, T1, and E1 RJ-45 Ports
RJ-45	Signal	Definition	Direction to or from the PortMaster 4
1	RXD (Ring)	Receive Data	Input
2	RXD (Tip)
4	TXD (Ring)	Transmit Data	Output
5	TXD (Tip)

  See "Ethernet Cable Specifications" on page A-3 for more information.

       Ethernet Cable Specifications

  Table A-4 provides cable specifications for the PortMaster 4 Ethernet interface.

  Table A-4 Ethernet Cable Specifications

 

Ethernet     Type	Connector    Type	Cable Type	Transmission    Distance
RJ-45	RJ-45 for 10BaseT	Category 5 unshielded twisted pair1	A Category 5 distributed cable that meets the ANSI/EIA-568-A standard has a maximum length of 328 feet (100 meters), divided as follows:   · 20 feet (6 meters) between the hub and the patch panel (if used)   · 295 feet (90 meters) from the wiring closet to the wall outlet   · 10 feet (3 meters) from the wall outlet to the desktop device   · A maximum of four repeaters  Ethernet cable must be grounded at both ends.
RJ-45	RJ-45 for 100BaseT	Category 5 unshielded twisted pair1

  1.  For NEBS-compliant installations, Category 5 shielded  twisted pair cable must be used.