Software release
- JUNOS 4.1 and later
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)
Note: The T1 PIC supports attenuation up to –12 dBm.
Hardware features
- Per-port loop timing
- Onboard DSU functionality for T1 connectivity
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
- Multiprotocol Label Switching (MPLS) circuit cross-connect (CCC)
- Point-to-Point Protocol (PPP)
Cables and connectors
- 100-ohm RJ-48 connector
LEDs One tricolor per port:
- Off—Not enabled
- Green—Online with no alarms or failures
- Amber—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)
- 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
