Detailed Feature Summary
Frame Alignment
Out-of-Service Testing
and Maintenance
In-Service
Performance Monitoring
•
Framed formats:
–
Independent transmit and receive
framing modes
T1: FT/SF/ESF/SLC/T1DM/TTC-JT(J1)
E1: FAS/MFAS/FAS+CAS/MFAS+CAS
•
Pseudo-Random Bit Sequence
(PRBS):
•
•
One-second timer I/O to synchronize
reporting
Receive error detectors with
accumulators:
–
–
–
–
–
–
–
Independent transmit and receive
211; 215; 220; 223 patterns
Framed or unframed mode
Optional 7/14 zero limit
–
Bipolar/Line Code Violations
(LCV) (CX28394 and CX28398
only)
•
•
Maximum Average Reframe Time
(MART) less than 50 ms
Transmitter alignment modes:
Bit Error Counter (BERR)
–
–
–
–
–
–
–
Excessive Zeros (EXZ)
Loss of Frame (RLOF)
Framing Errors (FERR)
CRC Errors (CERR)
Far End Block Errors (FEBE)
Severely Errored Frames (SEF)
Change of Frame Alignment
(COFA)
–
–
–
Align to system bus data
Align to system bus sync
Align to buffer data (embedded
framing)
•
Single error insertion:
–
–
–
–
PRBS error
Framing error
CRC error
BPV/LCV error (CX28394 and
CX28398 only)
COFA error
•
Unframed mode
Signaling
–
•
•
•
T1: 2-, 4-, or 16-state robbed bit
ABCD signaling
E1: Channel Associated Signaling
(CAS)
Common Channel Signaling (CCS) in
any time slot
Per-channel receive signaling stack
Signaling state change interrupt
Automatic and manual signaling
freeze
Debounce signaling (2-bit
integration)
UNICODE detection
System Bus Interface (SBI)
•
•
Transmit error detectors:
–
–
–
–
–
Loss of Frame (TLOF)
•
System bus data rates:
Framing Errors (TFERR)
Multiframe Errors (TMERR)
CRC Errors (TCERR)
–
–
–
–
–
1536 kbps (T1 without F-bits)
1544 kbps (T1)
2048 kbps (E1)
4096 kbps (2E1)
8192 kbps (4E1)
Loss of Transmit Clock (TLOC)
•
•
•
Receive alarm detectors:
–
–
–
–
–
–
Alarm Indication Signal (AIS)
Loss of Signal (RLOS)
•
•
•
•
•
Clock operation at 1x or 2x data rate
Selectable I/O clock edges
Master, slave, or mixed bus timing
Bit and time slot frame sync offsets
DS0 drop/insert indicators for
external mux
Embedded T1 framing transport
per G.802
RAI/Yellow Alarm (YEL)
Multiframe Yellow (MYEL)
Lost Frame Alignment (FRED)
Lost Multiframe Alignment
(MRED)
•
•
•
Signaling reinsertion on PCM system
bus
Separate I/O for system bus signaling
Per-channel transparent
•
•
–
Carrier Failure Alarm (CFA) with
8:1 dual slope integration
•
•
Receive and transmit slip buffers
•
•
Controlled Frame Slip (RFSLIP)
Uncontrolled Frame Slip (RUSLIP)
Automatic and on-demand transmit
alarms:
–
–
–
–
–
–
Bypass, 2-frame, or 64-bit depth
Slip detection with directional
status
Loopbacks
•
Remote loopback toward line
–
–
–
–
Slip buffer phase status
Per-channel idle code insertion
Processor accessible data buffers
AIS following RLOS and/or TLOC
Automatic AIS clock switching
YEL following FRED
YEL following 100ms reframe
timeout
Retains BPV transparency
(CX28394 and CX28398 only)
•
•
•
Payload loopback
Per-channel DS0 remote loopback
Local loopback towards system
–
–
Inband loopback code detection/
generation
Simultaneous local and remote line
loopbacks
•
Direct connection to upper layer
devices:
–
–
Link layer: Bt8474
ATM layer: CN8228
–
–
MYEL following MRED
FEBE following CERR
Framer digital loopback
Per-channel DS0 local loopback
•
•
Direct connection to physical line
interface
•
•
–
CX28380
Supported system bus formats:
–
–
–
ATT Concentration Highway
Interface (CHI)
Multi-Vendor Integration Protocol
(MVIP)
Processor Interface
•
•
Parallel 8-bit bus
Data strobes (Motorola) or address
latch enable (Intel)
Multiplexed or non-multiplexed
address/data bus
Synchronous or asynchronous
data transfers
Mitel ST-bus
•
Separate or internally multiplexed
bus modes
•
•
•
Open drain interrupt output with
maskable sources
100054E
Conexant
CONEXANT [ CONEXANT SYSTEMS, INC ]
