[Davicom]

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