Configuring T1 Interfaces

T1 is the basic physical layer protocol used by the Digital Signal level 1(DS1) multiplexing method in North America. A T1 interface operates at a bit rate of 1.544 Mbps and can support 24 DS0 channels. Supported DS1 standards include:

• ANSI TI.107, TI.102
• GR 499-core, GR 253-core
• AT&T Pub 54014
• ITU G.751, G.703

To configure T1-specific physical interface properties, include the t1-options statement at the [edit interfaces interface-name] hierarchy level:

[edit interfaces interface-name]

t1-options {

    bert-algorithm algorithm;

    bert-error-rate rate;

    bert-period seconds;

    buildout value;

    byte-encoding (nx56 | nx64);

    fcs (16 | 32);

    framing (esf | sf);

    idle-cycle-flag (flags | ones); 

    invert-data;

    line-encoding (ami | b8zs);

    loopback (local | payload | remote); 

    remote-loopback-respond;

    start-end-flag (filler | shared); 

    timeslots time-slot-range;

}

You can configure the following T1 interface-specific properties:

• Configuring T1 BERT Properties
• Configuring the T1 Buildout
• Configuring T1 Byte Encoding
• Configuring T1 Data Inversion
• Configuring the T1 Frame Checksum
• Configuring the T1 Remote Loopback Response
• Configuring T1 Framing
• Configuring T1 Line Encoding
• Configuring T1 Loopback Capability
• Configuring the T1 Idle Cycle Flag
• Configuring T1 Start and End Flags
• Configuring Fractional T1 Time Slots

See also the following properties, which apply to a number of different interfaces:

• Configuring the Media MTU
• Configuring the Encapsulation on a Physical Interface
• Configuring the Clock Source
• Configuring Receive and Transmit Leaky Bucket Properties
• Configuring an ISDN Dialer Interface as a Backup Interface