3Com MSR 30, MSR 50 manual Power-source, Syntax power-source Undo power-source

594CHAPTER 37: ISDN CONFIGURATION COMMANDS

n

Example

■After you specify a BSV interface operating on the network side to be in permanent active state on physical layer using the permanent-activecommand, no deactivating request is sent to physical layer. In this case, the interface remains in the active state if it is up and the physical link operates smoothly.

■The permanent-activecommand functions differently comparing with the isdn q921-permanentcommand. The former maintains the active state of BRI interfaces on physical layer and is only applicable to BRI interfaces operating on the network side. It cannot activate the BRI interfaces that are in inactive state on physical layer. The latter, however, enables ISDN BRI interfaces operating on user side to set up and maintain Q.921 links automatically. If no Q.921 link is established, the isdn q921-permanentcommand triggers the ISDN BRI interface to establish Q.921 links.

The support for these two commands varies with device models.

#Specify BRI 2/0 interface to be in permanent active state on physical layer (assuming that the interface is a BSV interface and operating on network side).

<Sysname> system-view [Sysname] interface bri 2/0

[Sysname-Bri2/0] isdn protocol-mode network

[Sysname-Bri2/0] permanent-active

power-source

Syntax power-source

undo power-source

View ISDN BRI interface view

Parameter None

Description Use the power-sourcecommand to enable remote powering on an ISDN BRI interface.

Use the undo power-sourcecommand to disable remote powering.

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

By default, remote powering is disabled.

n The support for these two commands varies with device models.

Example # Enable remote powering on BRI 2/0 interface (assuming that the interface is a BSV interface and operating on network side).