DSP1648C Datasheet | Agere Systems

Features s Introduction The DSP1648C, host-accelerated modem chip is an exciting new upgrade to Agere Systems Inc. line of host-based controller modems. The DSP1648C upgrades the technologies found in the DSP1648 V.90 modem solution to the new ITU-T remendations V.92 and V.44 munication industry standards. V.92 and V.44 have four innovative features , designed to improve modem performance in the internet environment. The new features are as follows: s s Two chip 3.3 V PCI modem solution with 5 V tolerant buffers Data mode capabilities: - ITU-T V.92- : 56000 bits/s- 28000 bits/s - ITU-T V.90- : 56000 bits/s- 28000 bits/s - ITU-T V.34: 33600 bits/s- 2400 bits/s - V.32bis, and fallbacks - V.42 and MNP ™ error correction (LAPM) - V.44, V.42bis and MNP Class 5 data pression FAX mode capabilities: - ITU-T V.17, V.29, V.27ter, and V.21 Ch 2 - ITU-T T.31 Class 1 FAX patible with transformer-based and silicon DAA circuits: - High-precision sigma-delta codec (CSP1034C) - Line-powered silicon DAA (CSP1035A) Enhanced voice features : - Full-duplex speakerphone (requires CSP1027 audio codec) - Telephone answering machine (TAM) - Caller identification (caller-ID) V.80 video-ready interface Bit I/Os to support domestic and international DAAs Low power consumption Flexible power management modes Operating system support: - Windows ® 95, 98, 2000, Windows NT ® 4.0, Windows ME, and Windows XP - Linux ® - PC 2001 pliant s s Modem fast connect: faster start-up times. Modem on hold†: switch between modem and an ining phone call without losing the data connection. PCM upstream: send data to central site at rates approaching 48 kbits/s. Data pression enhancement focused on todays internet traffic. s s s s s s The DSP1648C has an integrated PCI interface, which eliminates the 16550 UART bottleneck found in traditional hardware modems. The PCI interface supports both slave and master operations while providing greater access to host PC system resources. Host-based controller modems have...