Page 560 of 910 IP Line 4.5 administration
553-3001-365 Standard 4.00 August 2005
Configure the speed and duplex setting of the TLAN network interface using
the following commands:
•tLanSpeedSet speed – this command configures the speed of the TLAN
network interface. By default, the network interface auto-negotiates to
the highest speed supported by the switch. If the switch is 10/100BaseT,
the network interface negotiates to 100BaseT. Use this command to
debug Ethernet speed-related problems by forcing the network interface
to 10BaseT operation immediately. The duplex mode setting is saved in
NVRAM and read at start-up. The parameter speed is set to the
following:
10 – disables auto-negotiation and sets speed to 10 Mbps
10100 – enables auto-negotiation
•tLanDuplexSet duplexMode – this command immediately configures
the duplex mode of the TLAN network interface while operating when
auto-negotiate is disabled and speed has been fixed to 10 Mbps (or
10BaseT mode). The duplex mode is saved in NVRAM and read at
start-up. The parameter duplexMode is set to the following:
0 – enables full-duplex mode
1 – enables half-duplex mode
If the auto-negotiation is disabled, and the speed and duplex mode are forced
using the CLI commands, Nortel recommends that half-duplex mode be used
to inter-operate with the far end when the far end is set to auto-negotiate.
If the duplex mode is configured as full-duplex, the far end must be
configured as full-duplex and auto-negotiate must be turned off.
Half-duplex mode works with either half-duplex or auto-negotiate at the far
end. However, full-duplex at the near end only operates with full-duplex at
the far end.
For the IP Line 4.5 application, half-duplex has ample bandwidth for a Voice
Gateway Media Card even with 24 busy channels, VAD disabled, and G.711
codec with 10 Mbps voice payload size.