• The CP1181 is one of the OPTRANS series chips designed by Chiphomer Technology Limited. It is designed for add/drop multiplexer, terminal multiplexer, dual and single unidirectional ring applications. 21 E1/T1 signals are mapped to and from asynchronous TU12. The CP1181 interfaces to a byte-wide 19.44 MHz Telecom Bus.

• Asynchronously mapping/de-mapping 21 E1 or T1 traffics into/from STM-1. T1 traffic mapping path is T1VC11TU12.

• Configurable receive and transmit TU12 time-slots via microprocessor

• Detects loss of input clock on Telecom Bus

• Interprets TU12 pointer according to G.783 (2000/10) and G.707 (2000/10)

• Detects LOM, TU-LOP and TU-AIS alarms

• Detects Remote Defect Indication (RDI), Remote Error Indication (REI), RFI alarm and Path Label Mismatch(PLM) alarm

• Provides 12-bit performance counters for BIP-2 errors and 11-bit performance counters for tributary REI errors

• Detects degraded signals(DEG) and Excessive Error defects (EXC) based on received BIP-2 errors.

• Extracts the 16-byte J2 sequence into microprocessor accessible registers, and checks the J2 sequence to detect TIM alarm

• Detects the K4 (bit5-bit7) and V5 bit8 for Enhanced Defect Indicator (E-RDI)

• Captures filtered K4 byte into microprocessor accessible registers

• Extracts V5 and K4 bytes into microprocessor accessible registers

• Extracts N2 byte and O bits into microprocessor accessible registers

• Supports1+1 Path-protection

• Integrated bit-leaking circuit and DPLL

• The output jitter of E1/T1 data (either mapping jitter or combined jitter) is compliant with G.783 (2000/10)

• E1/T1 Port #0 to Port #7 can be configured to work in re-timing mode

• Supports the code-rate adjustment

• Optionally inserts VC-AIS and TU-AIS into upstream data

• Generates the TU12 pointer (V1, V2) per ITU G.783

• The TU12 pointer value is fixed on 105

• Calculates the BIP-2 and inserts into outgoing data stream, optionally inserts single or continued BIP-2 errors

• Inserts RDI/REI from either internal generation or microprocessor

• Inserts 16-byte programmable J2 sequence

• Inserts E-RDI from either internal generation or microprocessor

• Inserts programmable N2 byte and O bits

• Controlled High-Z output on transmit Telecom Bus

• Provides three bus timing modes for transmit Telecom Bus

• Build-in PRBS test function can be configured to any one of all 21 E1/T1 ports

• Provides 16-bit Intel/Motorola microprocessor interface

• 3.3V supply with 5V tolerant I/O

• IEEE 1149.1 JTAG boundary scan

• Maximum power less than 1.0 Watt

• Operating industrial temperature range: -40℃~85℃

• PBGA256 package

SDH Add/Drop Multiplexers、SDH Terminal Multiplexers、Multi-service Transport Platform (MSTP)