Cisco 194424 - Interface Module ISDN-BRI Manual de usuario descargar pdf (Pagina 21)

network-clock-select

ISDN BRI Voice on the Cisco MC3810 MOD-21

network-clock-select

Use the network-clock-select global conﬁguration command to specify selection priority for the

clock sources. Use the no form of this command to cancel the network clock selection.

network-clock-select priority {serial 0 | system | bvm | controller}

no network-clock-select priority {serial 0 | system | bvm | controller}

Syntax Description

Defaults

No network clock source is speciﬁed.

Command Mode

Global conﬁguration

Command History

Usage Guidelines

When an active clock source fails, the system chooses the next lower priority clock source speciﬁed

by this command. When a higher-priority clock becomes available, the system automatically

reselects the higher-priority clock source.

Note If the BRI backup port (BRI 0) is installed and becomes active, it automatically recovers

network clock for as long as it remains active. However, you can not give port BRI 0 a

clock-selection priority.

Enter the network-clock-select command to establish the clock-selection priority when there are

multiple sources of line (network) clocking in a Cisco MC3810. Possible sources of line clocking

for the Cisco MC3810 are the BRI voice module (BVM), the multiﬂex trunk module (MFT), and a

serial port conﬁgured for clock rate line.

priority Selection priority for the clock source from 1 (highest) to 4 (lowest).

serial 0 Clocking priority for serial interface 0.

system Clocking priority for the system clock.

bvm Clocking priority for the BRI voice module (BVM).

controller Clocking priority for either the trunk controller (T1/E1 0) or the digital voice

module (T1/E1/ 1).

Release Modiﬁcation

11.3 MA This command was ﬁrst introduced.

12.0(3) XG

The BVM as a possible network clock source was added.

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Cisco 194424 - Interface Module ISDN-BRI Manual de usuario Pagina 21