Software release
- JUNOS 4.2 and later
Description
- Four DS3 ports
- Power requirement: 0.32 A @ 48 V (15.6 W)
- Supports up to 28 T1 channels per port
- Data Service Unit (DSU) functionality
Hardware features
- Each T1 channel supports a single High-level Data Link Control (HDLC) framer that can be configured for speeds ranging from DS0 (64 Kbps) through full T1 (1.54 Mbps)
- Predictable throughput on all ports at 1.54 Mbps, full duplex
- Rate limiting on input and output
- Packet buffering, Layer 2 parsing
Software features
- DS3 alarm and event counting
- DS3 alarm and event detection
- DS3 diagnostics and loopback control
- B3ZS line encoding
- M13 or C-bit parity
- DS3 Simple Network Management Protocol (SNMP) support (DS3 MIB)
- Per-packet counts and byte counts
- Local and remote loopback testing
- 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
- Custom 10-ft (3.05-m) posilock to BNC male cable, separate RX and TX
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)
- Bit error rate (BER)
- Equipment failure (Does not affect service)
- Excessive zeros (EXZ)
- Far-end Block Error (FEBE)
- Frame error
- Idle code, Idle received
- Line code violation (LCV)
- Local and remote loopback
- Loss of Signal (LOS)
- Out of Frame (OOF)
- Parity bit (P-bit) disagreements
- Path parity error
- Yellow alarm bit (X-bit) disagreements
