54 Nortel IP Phone 2001—End—Full Duplex modeIn the Configuration menu, autonegotiate mode is the default setting forinitial startup. Nortel recommends that autonegotiate mode is used on thenetwork and the IP Phone. Use Full Duplex mode only when the networkis forced Full Duplex for 100BT Full Duplex mode; otherwise, a duplexmismatch results. No intervention is required under normal operation.Changing the speed and changing the duplex mode on the phone changesboth the LAN Ethernet port and PC Ethernet Port interfaces.ATTENTIONNortel recommends that autonegotiate mode is used on the network and the IPPhone. Use Full Duplex mode only when the network is forced Full Duplex for100BT Full Duplex mode; otherwise, a duplex mismatch results.If the IP Phone connects to a network configured for Full Duplex modeonly, the IP Phone cannot automatically negotiate the proper configuration.Therefore, in this instance, to allow the IP Phone to work at the optimumspeed and duplex mode, Full Duplex mode must be enabled.Use Procedure 4 "Enabling Full Duplex mode" (page 54) to enable FullDuplex mode.Procedure 4Enabling Full Duplex modeStep Action1 Reset the phone by disconnecting and reconnecting power.2 When the Nortel logo appears, press each soft key in sequence.See Procedure 3 "Installing an IP Phone 2001 for the first time usingDHCP" (page 47).3 If no other configuration changes are required, press OK repeatedlyuntil the Duplex network option appears.4 Select 1 to enable Full Duplex mode.5 When the Speed option appears, select one of the following:• 0 for 10 Mb/s• 1 for 100 Mb/s (default)Nortel Communication Server 1000IP Phones FundamentalsNN43001-368 02.01 StandardRelease 5.0 7 December 2007Copyright © 2003–2007, Nortel Networks.
