Software release

• Junos OS Release 6.3 and later

Description

• Four DS3 ports
• Power requirement: 0.32 A @ 48 V (15.6 W)
• Supports up to 28 T1 channels per port
• Data Service Unit (DSU) functionality

Hardware features

• Each T1 channel supports a single High-level Data Link Control (HDLC) framer that can be configured for speeds ranging from DS0 (64 Kbps) through full T1 (1.54 Mbps)
• Predictable throughput on all ports at 1.54 Mbps, full duplex
• Rate limiting on input and output
• Packet buffering, Layer 2 parsing

Software features

• DS3 alarm and event counting
• DS3 alarm and event detection
• DS3 diagnostics and loopback control
• B3ZS line encoding
• M13 or C-bit parity
• DS3 Simple Network Management Protocol (SNMP) support (DS3 MIB)
• 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)

Cables and connectors

• Custom 10-ft (3.05-m) posilock to BNC male cable, separate RX and TX

LEDs

One tricolor per port:

• Off—Not enabled
• Green—Online with no alarms or failures
• Yellow—Online with alarms for remote failures
• Red—Active with a local alarm; router has detected a failure

Alarms, errors, and events

• Alarm indication signal (AIS)
• Bit error rate (BER)
• Equipment failure (Does not affect service)
• Excessive zeros (EXZ)
• Far-end block error (FEBE)
• Frame error
• Idle code, Idle received
• Line code violation (LCV)
• Local and remote loopback
• Loss of signal (LOS)
• Out of frame (OOF)
• Parity bit (P-bit) disagreements
• Path parity error
• Yellow alarm bit (X-bit) disagreements