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T1 PIC (M120 Router)
Software release | Note:
This PIC is not supported in Junos OS Release 8.1R1. |
Description | - Four T1 ports
- Power requirement: 0.08 A @ 48 V (3.7 W)
- Supports clear channel T1 per port (1.544 Mbps per channel)
- Supports attenuation up to –12 dBm
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Hardware features | - Per-port loop timing
- Onboard DSU functionality for T1 connectivity
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Software features | - ESF and SF framing
- B8ZS and AMI coding
- ESF CSU counters, WRT impairments, and CRC checking
- Local DS1 line loopback, remote line loopback
- Configurable clock source—internal or loop
- Encapsulations:
- High-Level Data Link Control (HDLC)
- Frame Relay
- Circuit cross-connect (CCC)
- Point-to-Point Protocol (PPP)
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Cables and connectors | |
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
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Alarms, errors, and events | - Alarm indication signal (AIS)
- Bipolar violations
- Excessive zeros
- Far-end block errors (FEBE, E-bit errors)
- Loss of frame (LOF), Loss of signal (LOS)
- Yellow alarm bit (X-bit) disagreements
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Published: 2011-08-04
Copyright© 1999-2012 Juniper Networks, Inc. All rights reserved.
