Juniper Networks M20 - Manual (Page 17)

Channelized STM1 to E1 PIC
■ JUNOS 4.4 and later Software release
■ Four E3 ports
■ Power requirement: 0.32 A/48 V @ 15.3 W
■ 63 E1 channels
Description
■ Each E1 channel supports a single High-level Data Link Control (HDLC) framer that can
be configured for speeds from DS0 (64 Kbps) through full E1 (2 Mbps) in 64-Kbps
increments
■ Onboard DSU functionality for E1 and fractional E1 connectivity
■ Integrated support for G.703 and unframed mode and G.704 framed mode with CRC;
this feature is user-configurable
■ Configurable clock source: Internal or loop
■ Per-port loop timing
■ Rate limiting on input and output
■ NxE1 service with Multilink Point-to-Point Protocol (MLPPP, RFC 1990) delivered by the
Link Services and Multilink Services PICs
Hardware features
■ SDH mapping:
■ Tributary Unit Group 3 (TUG-3)
■ E1 support:
■ Full instrumentation per E1 channel
■ Integrated support for G.703 unframed mode and G.704 framed mode
■ 4-bit CRC for G.704 framed mode
■ HDB3 coding
■ Local E1 line loopback and remote line loopback
■ Per-channel BERT testing
■ Encapsulations:
■ Cisco High-level Data Link Control (HDLC)
■ Frame Relay
■ Multiprotocol Label Switching (MPLS) circuit cross-connect (CCC)
■ MPLS translational cross-connect (TCC)
■ Point-to-Point Protocol (PPP)
Software features
Channelized STM1 to E1 PIC ■ 17
Channelized STM1 to E1 PIC