Configure E1 Interfaces

E1 is a standard WAN digital communication format designed to operate over copper facilities at a rate of 2.048 Mbps. Widely used outside North America, it is a basic time division multiplexing scheme used to carry digital circuits. The following standards apply to E1 interfaces:

• ITU-T Recommendation G.703, Physical/electrical characteristics of hierarchical digital interfaces, describes data rates and multiplexing schemes for the E series.
• ITU-T Recommendation G.751, General Aspects of Digital Transmission Systems: Terminal Equipment, describes framing methods.
• ITU-T Recommendation G.775, Loss of Signal (LOS) and Alarm Indication Signal (AIS) Defect Detection and Clearance Criteria, describes alarm reporting methods.
  

  NOTE: The Juniper Networks E1 PIC does not support Channel Associated Signaling (CAS).

  
  

To configure E1-specific physical interface properties, include the e1-options statement at the [edit interfaces interface-name] hierarchy level:

[edit interfaces interface-name]

e1-options { 

    bert-error-rate rate;

    bert-period seconds;

    fcs (32 | 16);

    framing (g704 | g704-no-crc4 | unframed);

    idle-cycle-flag (flags | ones); 

    invert-data;

    loopback (local | remote); 

    start-end-flag (shared | filler);

    timeslots time-slot-range;

}

You can configure the following E1-specific properties:

• Configure E1 BERT Properties
• Configure the E1 Frame Checksum
• Configure E1 Framing
• Configure the E1 Idle Cycle Flag
• Configure E1 Data Inversion
• Configure E1 Loopback Capability
• Configure E1 Start End Flags
• Configure Fractional E1 Time Slots

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

• Configure the Media MTU
• Configure the Encapsulation on a Physical Interface
• Configure the Clock Source
• Configure Receive and Transmit Leaky Bucket Properties