3com MSR 20-20 참조 매뉴얼

BRI interface view

None

Use the isdn two-tei command to have the router requests the connected switch 
for a new TEI value before calling for a B channel.

Use the undo isdn two-tei command to restore the default TEI handling practice 
on the BRI interface.

This command applies in the situation where the switch with which the router 
works is an ISDN NI compliant switch (the DMS100 for example) in North America. 
In this case, you must ensure that the TEI value assigned to each B channel is 
unique to ensure a successful MP channel call. Otherwise, only one B channel can 
be brought up and calling for MP fails.

By default, all the B channels on the BRI interface use one TEI value.

# Configure the router to request the connected switch for a new TEI value before 
calling to bring up a B channel.

<Sysname> system-view

[Sysname] interface bri 1/0

[Router-Bri1/0] isdn two-tei 

ISDN BRI interface view

None

Use the permanent-active command to specify an ISDN BRI interface to be in 
permanent active state on physical layer.

Use the undo permanent-active command to cancel the configuration.

Note that these two commands are only applicable to ISDN BRI interfaces on BSV 
boards and operating on network side.

By default, BSV interfaces operating on the network side are not in permanent 
active state on physical layer.

Note that: