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Configuring Compressed RTP with PPP Encapsulation

On J-series Services Routers link services interfaces (ls) only, you can configure the compressed Real-Time Transport Protocol (RTP) with PPP encapsulation.

Note: Optionally, you can configure CRTP with MLPPP on a J-series Services Router. For more information, see Configuring Compressed RTP with MLPPP Encapsulation.

The configuration syntax for CRTP with PPP encapsulation is much like the syntax you use when you configure CRTP with MLPPP.

To configure CRTP with PPP encapsulation, perform the following steps:

  1. On the logical T1 or E1 constituent link, configure the link services interface used for compression by including the compression-device statement:
    compression-device interface-name;

    The interface name is the link services interface on which the T1 or E1 constituent link is bundled.

    You can include this statement at the following hierarchy levels:

  2. Specify how the link services interface handles voice traffic compression by including the following statements:
    compression {
    rtp {
    f-max-period number;
    queues [ queue-numbers ];
    port {
    minimum port-number;
    maximum port-number;
    }
    }
    }

    You can include these statements at the following hierarchy levels:

    For detailed information about these statements, see Configuring Voice Services Properties.

Example: Configuring Compressed RTP with PPP Encapsulation

Configure compression on a J-series T1 interface with PPP encapsulation. Configure fragmentation for all IP packets larger than 128 bytes.

[edit interfaces]
t1-1/0/0 {
encapsulation ppp;
unit 0 {
compression-device ls-0/0/0.1
}
}
ls-0/0/0.1 {
compression {
rtp {
port minimum 16384 maximum 32768;
}
}
family inet {
address 10.0.2.3;
# Other IPv4 parameters here.
}
}
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