Cisco MC3810 Instalační příručka stáhnout pdf (Strana 15)

Configuring Codec Selection Order

Configuring Voice over IP for Cisco MC3810 Series Concentrators 15

To conﬁgure a voice class in which you can deﬁne the order of preference in which a router selects

a codec when it negotiates with a far-end router, enter the following commands beginning in global

conﬁguration mode:

Applying a Voice Class for Codec Selection to a VoIP Dial Peer

After you have created the voice class, assign it to a VoIP dial peer. You cannot assign voice-class

codec attributes to POTS dial peers.

To apply voice-class signaling attributes to a VoIP dial peer, complete the following steps beginning

in global conﬁguration mode:

Step Command Purpose

router(config)# voice class codec

tag

Create a voice class for a codec preference list. The range for the tag number

is 1 to 10000. The tag number must be unique on the router.

router(config-voice-class)# codec

preference

priority codec

[bytes

payload-size

]

Conﬁgure the selection order of preference for a codec. Repeat this command

to specify selection orders of preference for additional codecs, if required.

router(config-voice-class) #exit

Exit from voice-class conﬁguration mode.

Step Command Purpose

router(config)# dial-peer voice

tag

voip

Deﬁne a VoIP dial peer and enter dial-peer conﬁguration mode. All subsequent

commands that you enter in dial-peer voice mode before you exit will apply to this

dial peer.

The tag is a number that identiﬁes the dial peer and must be unique on the router. Do

not assign duplicate tag numbers.

router(config-dialpeer)#

voice-class codec

tag

Assign to the dial peer the voice class that you created in the “Conﬁguring a Voice

Class to Deﬁne Codec Selection Order” section.

Note The voice-class command in dial-peer conﬁguration mode is entered with a

hyphen. The voice class command in global conﬁguration mode is entered without the

hyphen.

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Cisco MC3810 Instalační příručka Strana 15