The RL56CSMV/6 is a member of the Conexant™ AnyPort™ family of multi-service access processors, and provides a complete solution to the transport of multiple media types between circuit-switched remote access and a variety of backend networks (Table 1). AnyPort processors are ideally suited for the network infrastructures resulting from the convergence of voice and data networking, addressing new requirements such as Voice and Fax over packet networks, ISDN and Cellular Data, while maintaining support of traditional PSTN Data/Fax needs.

Features
Generic
• Six access channels in one package
• +3.3V/+2.5V operation with +5V tolerant inputs
• Downloadable controller firmware and data pump code
• Advanced RISC Machines (ARM) architecture
• Low-power sleep mode with quick wake
• Glueless interface to Conexant Bt8370 T1/E1/PRI framer with time slot selection
• Built-in phase lock loop (PLL)

Signaling
• DTMF detection and generation
• Multi-frequency tone support for legacy network equipment (R1 and R2)

Data
• Data modem modes
   − PSTN: ITU-T V.90, K56flex, K56Plus, V.34 (33.6 kbps), V.FC, V.32 bis, V.32, V.22 bis, V.22A/B, V.23, and V.21; Bell 212A and 103
   − ISDN: 64/56 kbps ISDN Basic Rate Interface B Channel HDLC control, or data pass-through mode for HDLC processing elsewhere in the central site system
• Internal error correction and data compression (ECC)
   − V.42 LAPM and MNP 2-4 error correction
   − V.42 bis and MNP 5 data compression
   − MNP 10EC enhanced cellular
• Async/sync HDLC conversion
• V.120 ISDN data
• V.110 cellular data
• LAP-B X.75

Voice
• Baseline configuration:
   − G.723.1 and G.723.1 Annex A
   − G.711 µ-law and A-law
   − G.729 Annex A and Annex B
   − G.168 128 ms Network Echo Canceller
• Patented robust jitter buffer
• Voice API using Mailbox Messages

FAX
• Fax modem send and receive rates up to 33600 bps
• V.34, V.17, V.33, V.29, V.27 ter, and V.21 channel 2, Group 3, T.30 protocol and Class 1, 2 supported
• T.38 real-time fax protocol