Rainbow Electronics DS33M33 - Manual (Page 14)

___________________________________________________ DS33M30/M31/M33 ABRIDGED DATA SHEET
Rev: 111908 14 of 20
1.4.3.2 Line DS3/E3 Formatter (Optional)
• Insertion of all overhead for M23 DS3, C-bit parity DS3, G.751 E3, and G.832 E3
• Automatic or manual generation of RDI/RAI and FEBE/REI
• Fully programmable automatic AIS insertion upon detection of an outbound Drop Telecom Bus alarm
indication (DALARM), VC-4 LOP, VC-4 AIS-P, STS-1/AU-3/TU-3 LOP, and/or STS-1 SPE/VC-3 AIS-P
• Automatic generation of RDI/RAI and FEBE/REI
• Programmable error insertion of framing errors, parity errors, and FEBE/REI errors
• All DS3/E3 overhead fields can be sourced from the externally controlled transmit DS3/E3 overhead input
port
• Insertion of HDLC data stream into DS3 path maintenance data link (PMDL), G.751 E3 national bit, or
G.832 E3 NR or GC bytes
• Insertion of FEAC data into DS3 FEAC bit or G.751 E3 alarm bit
• Insertion of trail trace access point identifier into G.832 E3 TR byte
• M23 DS3 C-bits programmable as payload or overhead
• Formatter pass-through mode with programmable DS3 P-bit correction for DS3/E3 line terminating
equipment (LTE) applications
1.4.3.3 FEAC Controller
• One controller per port at the Receive DS3/E3 framer and Transmit DS3/E3 Formatter
• Designed to handle multiple FEAC codewords without Host intervention
• Receive FEAC automatically validates incoming codewords and stores them in a 4-byte FIFO
• Transmit FEAC can be programmed to send one code word, one code word continuously, or two different
code words back-to-back to send DS3 Line Loopback commands
• Terminates the FEAC port in DS3 C-Bit Parity mode or either the Sn or A bit in G.751 E3 mode
1.4.3.4 Receive B3ZS/HDB3 Decoder
• Software programmable B3ZS/HDB3 or AMI decoding
• Detection of loss of signal (LOS) and receipt of B3ZS/HDB3 codewords
• Detection and accumulation of bipolar violations (BPV), code violations (CV), and excessive zeroes
occurrences (EXZ)
1.4.3.5 Transmit B3ZS/HDB3 Encoder
• Software programmable B3ZS/HDB3 or AMI decoding
• Programmable insertion of bipolar violations (BPV), code violations (CV), and excessive zeroes
occurrences (EXZ)
1.4.4 Loopback
• Line analog terminal loopback—ALB (transmit LIU/line output to receive LIU/line input)
• Line facility loopback—LLB (receive LIU/line output to transmit LIU/line input)
• Diagnostic terminal loopback—DLB (transmit formatter output to receive framer input)
• Payload loopback—PLB (receive framer output to transmit formatter input)
• STS-3/STM-1 interface loopback—SLB (Outbound Drop Telecom Bus input to Inbound Add Telecom Bus
output)
• Simultaneous line facility loopback (LLB) and diagnostic terminal loopback (DLB)
• Optionally AIS (unframed all-ones, UA1, or framed AIS) can be inserted in the normal data stream during a
line (LLB), framer diagnostic (DLB), payload (PLB), or STS-3/STM-1 loopback (SLB) mode
1.5 Virtual Concatenation (VCAT) (DS33M31 and DS33M33 only)
• Up to three VCG engines
1.5.1 SONET/SDH VCAT/LCAS
• Supports up to three VC-3 in one VCG (per ITU-T G.707)
• Supports differential delay compensation up to 200ms