Juniper Networks M20 - Manual (Page 16)

Channelized E1 PIC
■ JUNOS 5.1 and later Software release
■ Ten E1 ports
■ Power requirement: 0.15 A/48 V @ 7.2 W
■ Supports up to 24 NxDS0 channels per port
■ Data Service Unit (DSU) functionality
Description
■ Ports configurable as clear channel E1 interfaces with 2.048-Mbps connectivity
■ Rate limiting on input and output
■ Packet buffering, Layer 2 parsing
Hardware features
■ Four data-link connection identifiers (DLCIs) per logical customer channel
■ Unframed E1 G.703 and G.704 framing modes
■ HDB3 line coding
■ CRC4 configurable
■ Per-packet counts and byte counts
■ Local and remote loopback testing
■ Encapsulations:
■ High-Level Data Link Control (HDLC)
■ Frame Relay
■ Circuit cross-connect (CCC)
■ Translational cross-connect (TCC)
■ Point-to-Point Protocol (PPP)
Software features
■ 128-ohm RJ-48C Cables and connectors
One bicolor per port:
■ Off—Port not enabled
■ Green—Physical E1 link is up; individual subchannels can be down
■ Red—Physical E1 link is down
LEDs
■ Alarm Indication Signal (AIS)
■ Loss of Frame (LoF)
■ Out of Frame (OoF)
■ Failed Signal Rate (FSR)
Alarms, errors, and
events
16 ■ Channelized E1 PIC
M20 Internet Router PIC Guide: End-of-Life PICs