Juniper Networks Juniper M-series M10i - Manual (Page 34)

E1 PIC
■ JUNOS 6.1 and later Software release
■ Four E1 or coaxial ports
■ Power requirement: 0.08 A @ 48 V (3.74 W)
■ Two versions:
■ 4-port, 120-ohm, RJ-48
■ 4-port, 75-ohm, coaxial
■ Onboard DSU functionality for E1 connectivity
Description
■ High-performance throughput on each port at speeds up to 2.048 Mbps, full duplex
■ Maximum transmission units (MTUs) of up to 4500 bytes
■ Per-interface diagnostics and loopback control
■ Per-interface shaping on output
■ Per-interface alarm and event counting and detection
■ HDB3 line coding
■ 4-bit CRC for G.704 framed mode
■ Per-port loop timing
■ Balanced and unbalanced modes
■ Packet buffering, Layer 2 parsing
■ Full bit error rate test (BERT)
Hardware features
■ Integrated support for G.703 unframed mode and G.704 framed mode with CRC; this
feature is user-configurable
NOTE: The G.704 implementation supports speeds slower than 2.048 Mbps; multiple channels
within a single E1 interface are not supported.
■ Configurable clock source: Internal or loop
■ Encapsulations:
■ High-Level Data Link Control (HDLC)
■ Frame Relay
■ Circuit cross-connect (CCC)
■ Point-to-Point Protocol (PPP)
Software features
■ Two versions:
■ Four RJ-48 connectors (one per port)
■ Four coaxial connectors
■ Custom 10-ft (3.05-m) posilock to BNC male cable, separate Rx and Tx
Cables and connectors
34 ■ E1 PIC
M10i Internet Router PIC Guide