Software release
- JUNOS 7.4 and later
Description
- Ten T1 ports
- Power requirement: 0.15 A @ 48 V (7.2 W)
- Intelligent queuing (IQ) PICs support fine-grained queuing per logical interface.
- Channelization: T1, FT1, NxDS0
Hardware features
- Data service unit (DSU) and channel service unit (CSU) functionality
- Ports configurable as clear channel T1 interfaces with 1.544-Mbps connectivity
- Framing: Superframe (SF or D4) and Extended Superframe (ESF)
- Supports B8ZS (bipolar 8-zero substitution) and AMI (alternate mark inversion) line coding
- Local, remote, and payload loopback testing
- ANSI T1.403 loopback support:
- Responds to embedded loopback commands upon receipt of an FDL command from remote end with loopup and loopdown at both line and payload level
- Insertion of loopback commands enables remote CSU/NIU/Smartjack to enter loopback and loopdown at both the line and payload level (ANSI and Telcordia)
- Inband loopback support:
- Responds to inband loopback commands at both the line and payload level (ANSI and Telcordia)
- Insertion of inband loopback commands at both the line and payload level (ANSI and Telcordia)
- Clocking support of external (line) and internal
- Buildout support of the following ranges:
- 0 through 132 (Line buildout is from 1 through 132 feet)
- 133 through 265 (Line buildout is from 133 through 265 feet)
- 266 through 398 (Line buildout is from 266 through 398 feet)
- 399 through 531 (Line buildout is from 399 through 531 feet)
- 532 through 655 (Line buildout is from 532 through 655 feet)
Software features
- Quality of service (QoS) per channel: weighted round-robin (WRR), random early detection (RED), weighted random early detection (WRED)
- SNMP: T1 MIB and DS0 MIB
- Dynamic, arbitrary channel configuration
- Full bit error rate test (BERT) patterns at T1 and DS0 levels
- Encapsulations:
- High-Level Data Link Control (HDLC)
- Frame Relay
- Circuit cross-connect (CCC)
- Translational cross-connect (TCC)
- Point-to-Point Protocol (PPP)
Cables and connectors
- 120-ohm RJ-48C connector (female)
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)
- Remote defect indication (RDI)
- Loss of frame (LOF)
- Loss of signal (LOS)
- Bipolar violation (BPV)
- Excessive zero (EXZ)
- Line code violation (LCV)
- Error seconds (ES)
- Severely errored seconds (SES)
- Severely errored frames (SEF)
- Bit error event (BEE)
Instrumentation (counters)
- Layer 2 per-queue and per-channel packet and byte counters
- 24–hour history or error counter updated at 15–minute intervals
