3Com 10014299 manual AUX Interface, Backup, Set MTU of asynchronous serial interface

122CHAPTER 10: CONFIGURING WAN INTERFACE

Please use the following commands in the view of the asynchronous serial interface.

Table 104 Enable or disable the level detection for the asynchronous serial interface

Operation	Command
Enable the level detection for the asynchronous serial	detect dsr-dtr
interface.
Disable the level detection for the asynchronous serial	undo detect dsr-dtr
interface.

By default the level detection is enabled for the asynchronous serial interface.

12Enable or disable internal loopback and external loopback

On performing special function test, the internal loopback and external loopback is enabled for the asynchronous serial interface.

Please use following commands in the view of the asynchronous serial interface.

Table 105 Enable or disable internal loopback and external loopback for the asynchronous serial interface

Operation	Command
Enable internal loopback and external loopback for	loopback
the asynchronous serial interface.
Disable internal loopback and external loopback for	undo loopback
the asynchronous serial interface.

The internal loopback and external loopback are disabled by default.

13Set MTU

MTU of asynchronous serial interface influences the fragmentation and reassembling of IP network protocol message on this interface.

Please use the following commands in the view of the asynchronous serial interface.

Table 106 Set MTU of asynchronous serial interface

Operation	Command
Set MTU of asynchronous serial interface	mtu size
Recover MTU default	undo mtu

The unit of mtu is byte, ranging from 128 to 1500, with 1500 as default.

14 Set the coding format of Modem

Please perform the following configurations in asynchronous serial interface mode.

Table 107 Set the coding format of Modem

Operation	Command
Set the coding format of Modem	country-code area-name

AUX Interface	AUX interface is a fixed port provided by the 3Com Router. It can be used as a
	common asynchronous serial interface with the highest rate of 115200bps. It can
	also implement functions such as remote configuration of the router and line
	backup.