Software release

• Junos OS Release 5.4 and later

Description

• Four DS3 ports
• Power requirement: 0.39 A @ 48 V (19 W)
• Conforms to ANSI T1.105-1991 and T1E1.2/93-020R1
• Asynchronous Transfer Mode (ATM) standards compliant
• Alarm and event counting and detection
• Compatible with well-known ATM switches
• ATM switch ID, which displays the switch IP address and local interface name of the adjacent Fore ATM switches

Hardware features

• OAM fault management processes alarm indication signal (AIS) and remote defect indicator (RDI) cells
• ASIC-based packet segmentation and reassembly (SAR) management and output port queuing
• 16-MB SDRAM memory for ATM SAR
• Packet buffering, Layer 2 parsing
• Configurable framing options:
  • C-bit with ATM direct mapping
  • C-bit with PLCP framing (default)
  • M23 ATM direct mapping
  • M23 with PLCP framing

Software features

• Multiprotocol Label Switching (MPLS) circuit cross-connect (CCC) for leveraging ATM access networks
• Support for user-configurable virtual circuits (VC) and virtual paths (VP)
• ATM Inverse Address Resolution Protocol (ARP), which enables routers to automatically learn the IP address of the router on the far end of an ATM permanent virtual circuit (PVC)
• Unspecified bit rate (UBR) traffic shaping
• Fine-grained variable bit rate (VBR) traffic shaping
• Outbound PIC queues cells on a per-VC basis
• Encapsulations—AAL5 subnetwork attachment point (SNAP)

Cables and connectors

• 10-ft (3.05-m) posilock SMB to BNC
• Four pairs of RX and TX coaxial cables

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)
• Far-end block error (FEBE)
• Frame error
• Idle code
• Idle received
• Local and remote loopback
• Loss of signal (LOS)
• Out of frame (OOF)
• Path parity error
• Yellow alarm