General Description
The DM336P integrated modem is a four chipset design that provides a complete solution for state-of the-art, voice-band Plain Old Telephone Service (POTS) communication. The modem provides for Data (up to 33,600bps), Fax (up to 14,400bps), Voice and Full Duplex Speaker-phone functions to comply with various international standards.

FEATUREs
• Compatibility
   - ITU-T V.34 (33600 to 2400 bps)
   - CCITT V.32bis (14400, 12000, 9600, 7200, 4800bps)
   - CCITT V.32 (9600, 7200, 4800bps)
   - CCITT V.22bis (2400, 1200bps)
   - CCITT V.22 (1200bps)
   - CCITT V.23 (1200/75bps)
   - Bell 212A (1200bps)
   - Bell 103 (300bps)
   - CCITT V.17 (14400, 12000, 7200bps)
   - CCITT V.29 (9600, 7200bps)
   - CCITT V.27ter (4800, 2400bps)
   - CCITT V.21 Channel 2 (300bps)
• Data Error Correction
   - MNP Class 2, 3 & 4
   - CCITT V.42 LAMP
• Data Compression
   - MNP Class5
   - CCITT V.42bis
   - Voice compression
   - 2 and 4 bit ADPCM voice compression
• DTE Interface
   - DTE speed up to 115200bps
   - Serial V.24 (EIA-232-D)
• Enhanced “AT” command set and S registers
• Caller identification (Caller ID) support
• Full duplex speakerphone (Telephone Emulation)
• 16 Bits over-sampling codec
• Selectable world wide call progress tone detection
• Compromise and adaptive equalizer providing channel impairment compensation
• The channel impairment compensation
• Plug and Play (PnP) support
• Integrated UART 16550
• Enhanced 8031 compatible micro-controller
• 8 selectable interrupts
• Parallel and serial interfaces supported
   - 6-, 7- and 8- bit character support
   - Even, odd, mark and none parity detection and generation
   - 1 and 2 stop bit support
   - Auto DTE data speed detection through ”AT”
• Access up to 128K bytes external program memory
• Access up to 64K bytes external data memory
• NVRAM to store two user configurable, switchable profiles and three programmable telephone numbers
• Full duplex data mode test capabilities
   - Analog loop test