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.
  
  

  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