Getting Started with the Contivity Extranet Switch 1500 Series3-8Serial Interface Cable (Optional)Nortel Networks recommends that you use the IP Address Configuration Utilitydiskette for easy initial IP address configuration (refer to page 4-3 for details).However, Nortel Networks ships a serial cable with the Switch. Optionally, youcan use the Serial Interface to provide the Switch with a Management IP Address,subnet mask, and default gateway address (refer to page 4-2 for details). Later,you can use the serial interface configuration menu to perform managementfunctions that you might need if problems were to arise.The serial cable provided with the Switch is a DB9/DB25-to-DB9/DB25. Thisprovides a crossover (transmit-to-receive and receive-to-transmit). The DB9connector goes into the Switch and the other DB9 or DB25 connector goes intoyour workstation. You should ignore the extra DB25 connection thatis attached to the Switch. Table 3-3 shows the multiple cable DB-9/DB25serial interface cable pinouts.Table 3-3. Multi-DB-9 and DB-25 Connector PinoutsSerial PortDB-9 ConnectorSerial PortDB-25 ConnectorSerial PortDB-25 ConnectorSerial PortDB-9 ConnectorPinout Signal Pinout Signal Pinout Signal Pinout Signal2 RXD 3 TXD > 2 RXD 3 TXD3 TXD 2 RXD > 3 TXD 2 RXD4 DTR 20 DSR > 6 DTR 6 DSR5 Ground 7 Ground > 7 Ground 5 Ground6 DSR 6 DTR > 20 DSR 4 DTR7 RTS 4 RTS > 5 CTS 8 CTS8 CTS 5 CTS > 4 RTS 7 RTS