Cisco 194424 - Interface Module ISDN-BRI Instrukcja Użytkownika Pobierz pdf (Strona 19)

network-clock-priority

ISDN BRI Voice on the Cisco MC3810 MOD-19

network-clock-priority

Use the network-clock-priority interface conﬁguration command to specify the clock-recovery

priority for the BRI voice ports in a BRI voice module (BVM). Use the no form of this command to

restore the default (low) clock-recovery priority.

network-clock-priority {low | high}

no network-clock-priority {low | high}

Syntax Description

Defaults

Each BRI voice port has low clock-recovery priority.

Command Mode

Interface conﬁguration

Command History

Usage Guidelines

This command is supported only on the Cisco MC3810.

This command is only valid for BRI ports conﬁgured as TE. It allows you to select which PINX

(PBX) is the ﬁrst-priority clock source.

This command becomes effective only when the BVM is the clock source for the Cisco MC3810;

this happens in three ways:

• When the BVM is speciﬁed as the ﬁrst-priority network clock source through the

network-clock-select command.

• When the BVM is speciﬁed as a lower-priority network clock source, and a higher-priority

network clock source is lost.

• When the BVM is the only network clock source.

The BRI voice port supplying clock operates as a line source; if there are other BRI voice ports

conﬁgured as TE, they operate in loop-timed mode.

Regardless of the network-clock-priority setting, the ﬁrst TE-conﬁgured BRI voice port that

becomes active is automatically chosen to supply clock. The clock source does not change if another

BRI voice port conﬁgured for network-clock-priority high becomes active.

low

The BRI port is second priority to recover clock.

high

The BRI port is ﬁrst priority to recover clock.

Release Modiﬁcation

12.0(3) XG This command was ﬁrst introduced.

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