CN8380 Datasheet, PDF (3/91 Pages) Conexant Systems, Inc – integrated quad line interface unit unit for both 1.544 Mbps (T1) and 2.048 Mbps (E1) applications

CN8398EVM Octal T1/E1 Evaluation Module
Eight RJ48C T1 or E1 Line Connections
CN8380 Quad T1/E1 LIU
CN8380 Quad T1/E1 LIU
Microprocessor
Control
CN8398 Octal T1/E1 Framer
8380_002
Local PCM Highway (i.e., 2 @ 8192 kbps)
Contact a Conexant representative for EVM availability and price.
Detailed Feature Summary
Interface Compatibility
• T1.102–1993
• G.703 at 1.544 or 2.048 Mbps
• ITU-T Recommendation I.431
Receive Line Interface
• External Termination
• Equalizer compensation for – 20 dB
bridged monitor levels
• + 3 dB to –12 dB receiver sensitivity
Transmit Line Interface
• Pulse shapes for 0–655 ft., in 133 ft.
steps (T1 DSX–1)
• External termination for improved
return loss
• Line driver enable/disable for
protection switching
• Output short circuit protection (for
BABT applications)
Jitter Attenuator Elastic Store
• Receive or transmit direction
• 8-, 16-, 32-, 64-, or 128-bit depth
• Automatic and manual centering
Line Codes
• Bipolar alternate mark inversion line
coding
• Optional zero code suppression:
– Independent transmit and receive
– T1: B8ZS
– E1: HDB3
Loopbacks
• Remote loopback towards line
– With or without JAT
– Retains BPV transparency
• Local loopback towards system
– Analog line loopback
– Local digital loopback
• Simultaneous local and remote line
loopbacks
Clock Rate Adapter
• Outputs jitter attenuated line rate
clock
– CLK1544 = 1544 k (T1)
– CLK2048 = 2048 k (E1)
• CLAD output supports 14 output
clock frequencies: 8 kHz to
32,768 kHz
• Programmable input timing
reference:
– Receive recovered clock from any
channel
– Internal clock (REFCKI)
– CLADI
• Subrate CLADI timing reference:
– Line rate ÷2^N, N = 0 to 7
– References as low as 8 kHz
Host Serial Interface
• Compatible with existing framers
• Compatible with microprocessor
serial ports
• Bit rates up to 8 Mbps
In-Service Performance Monitoring
• Transmit alarm detectors:
– Loss of Transmit Clock (TLOC)
– Transmit Short Circuit (TSHORT)
• Receive alarm detectors:
– Loss of Signal (RLOS)
– Loss of Analog Input (RALOS)
– Bipolar/Line Code Violations
• Automatic and on-demand transmit
alarms:
– AIS following TLOC
– Automatic AIS clock switching
N8380DSA
Conexant
Advance Information