Juniper-networks M7I Uživatelský manuál Strana 60

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E1 PIC (M7i Router)
Junos OS Release 6.0 and laterSoftware 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
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