Juniper Networks M20 - Manual (Page 10)

ATM OC3 PIC
■ JUNOS 3.1 and later Software release
■ Two OC3 ports
■ Power requirement: 0.49 A @ 48 V (23.7 W)
■ Conforms to ANSI T1.105-1991 and T1E1.2/93-020R1
■ ATM and SONET/SDH 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
■ Optical interface support—see Table 2 on page 11
Description
■ Dual 3010 SAR for segmentation and reassembly into 53-byte ATM cells
■ High-performance parsing of SONET/SDH frames
■ 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
Hardware 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)
Software features
■ Duplex SC/PC connector (RX and TX) Cables and connectors
10 ■ ATM OC3 PIC
M20 Internet Router PIC Guide: End-of-Life PICs