Configuring Network Interfaces for Voice Services
To complete a voice services interface configuration, you need to configure the physical network interface with either MLPPP encapsulation and a voice services bundle or PPP encapsulation and a compression interface, as described in the following sections:
Configuring Voice Services Bundles with MLPPP Encapsulation
For voice services interfaces, you configure the link bundle as a channel. The physical interface is usually connected to networks capable of supporting MLPPP; the interface types supported for voice traffic are T1, E1, T3, E3, OC3, OC12, and STM1, including channelized versions of these interfaces.
 | For M Series routers and T Series routers, the following caveats apply:
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To configure a physical interface link for MLPPP, include the following statement:
You can configure this statement at the following hierarchy levels:
- [edit interfaces interface-name unit logical-unit-number family mlppp]
- [edit logical-systems logical-system-name interfaces interface-name unit logical-unit-number family mlppp]
When you configure family mlppp, no other protocol configuration is allowed. For more information on link bundles, see Configuring the Links in a Multilink or Link Services Bundle.
Configuring the Compression Interface with PPP Encapsulation
To configure the physical interface for PPP encapsulation, you also need to specify the services interface to be used for voice compression: a Link Services IQ (lsq-) interface.
To configure the compression interface, include the compression-device statement:
You can configure this statement at the following hierarchy levels:
- [edit interfaces (lsq | ls)-fpc/pic/port unit logical-unit-number]
- [edit logical-systems logical-system-name interfaces (lsq | ls)-fpc/pic/port unit logical-unit-number]
