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Channelized OC3/STM1 (Multi-Rate) Circuit Emulation MIC with SFP


Software release

  • Junos OS Release 12.3 and later


  • Four OC3/STM1 ports

  • Rate-selectable using one of the following rates:

    • 4-port OC3/STM1

    • 1-port OC12/STM4

  • One channelized OC12/STM4 port (down to DS0)

  • SONET or SDH is configurable on a MIC level

  • SONET channelization:

    • 4 OC3 channel

    • 336 DS1 channels

    • 2016 DS0 channels (combination of nxDS0)

  • SDH channelization:

    • 4 STM1 channel

    • 252 E1 channels

    • 2016 DS0 channels (combination of nxDS0)

  • Power requirement: 2.21 A @ 12 V (26.56 W)

  • Weight: 1.67 lb (0.76 kg)

  • Model number: ACX-MIC-4COC3-1COC12CE

Hardware features

  • Ports are numbered 0 through 3

Software features

  • Per-MIC SONET/SDH framing

  • Internal and loop clocking

  • Encapsulations:

    • Pseudo Wire Emulation Edge-to-Edge (PWE3) Architecture (RFC 3985)

    • Requirements for Pseudo-Wire Emulation Edge-to-Edge (PWE3) (RFC 3916)

    • Structure-Agnostic Time Division Multiplexing (TDM) over Packet (SAToP) (RFC 4553)

    • Structure-Aware Time Division Multiplexed (TDM) Circuit Emulation Service over Packet Switched Network (CESoPSN) (RFC 5086)

    • Pseudowire Emulation Edge-to-Edge (PWE3) Control Word for Use over an MPLS PSN (RFC 4385)

Cables and connectors

Tip: You can use the Hardware Compatibility Tool to find information about the pluggable transceivers supported on your Juniper Networks device.

Note: To extend the life of the laser, when a MIC is not being actively used with any valid links, take the MIC offline until you are ready to establish a link to another device. For information about taking a MIC offline, see the request chassis pic offline command in the Junos OS System Basics and Services Command Reference.


OK/FAIL LED, one bicolor:

  • Green—MIC is functioning normally

  • Red—MIC has failed

LINK LED, 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

Structure-agnostic alarms for T1 and E1 interface:

  • Alarm indication signal (AIS)

  • Loss of signal (LOS)

  • Line code violation (LCV)

  • Errored seconds (ES)

  • Line-errored seconds (LES)

  • Severely errored seconds (SES)

  • Unavailable errored seconds (UAS)

Structure aware alarms for T1 and E1 interface:

  • Severely errored frame (SEF)

  • Block error event (BEE)

  • Loss of frame (LOF)

  • Yellow alarm (remote alarm indication RAI)

  • Path code violation (PCV)

  • Severely errored frame seconds (SEFS)

  • Bursty errored seconds (BES)