Juniper Networks M7I - Manual (Page 60)

E1 PIC (M7i Router)
• Junos OS Release 6.0 and later Software release
• Four E1 or coaxial ports
• 4-port, 120-ohm, RJ-48
• 4-port, 75-ohm, coaxial
• Power requirement: 0.08 A @ 48 V (3.74 W)
• 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
Copyright © 2010, Juniper Networks, Inc. 60
M7i Multiservice Edge Router PIC Guide