Juniper Networks M20 - Manual (Page 26)

Multichannel DS3 PIC
■ JUNOS 5.1 and later Software release
■ Two DS3 ports
■ Power requirement: 0.31 A @ 48 V (14.9 W)
■ Supports up to 128 logical customer channels per DS3 port
Description
■ Support for NxT1 by interoperating with the Link Services and Multilink Services PICs,
using MLPPP and MLFR protocols
■ Onboard DSU functionality
Hardware features
■ Support for four data-link connection identifiers (DLCIs) per logical customer channel
■ DS3 alarm and event counting
■ DS3 alarm and event detection
■ DS3 diagnostics and loopback control
■ DS3 framing: M13, C-bit
■ T1 framing: super frame (SF) and extended super frame (ESF)
■ Encapsulations:
■ High-Level Data Link Control (HDLC)
■ Frame Relay
■ Circuit cross-connect (CCC)
■ Point-to-Point Protocol (PPP)
Software features
■ Custom 10 ft/3.05 m posilock to BNC male cable, separate Rx and Tx Cables and connectors
One tricolor per port:
■ Off—Not enabled
■ Green—Online with no alarms or failures
■ Amber—Online with alarms for remote failures
■ Red—Active with a local alarm; router has detected a failure
LEDs
26 ■ Multichannel DS3 PIC
M20 Internet Router PIC Guide: End-of-Life PICs