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Speakerphone Mode (ISDN and SP Models)
The speakerphone mode features an advanced proprietary speakerphone algorithm which supports full-duplex voice
conversation with both acoustic and line echo cancellation. Parameters are constantly adjusted to maintain stability with
automatic fallback from full-duplex to pseudo-duplex operation. The speakerphone algorithm allows position independent
placement of microphone and speaker.
The speakerphone mode provides hands-free full-duplex telephone operation under host control. The host can separately
control volume, muting, and AGC in microphone and speaker channels.
Synchronous Access Mode (SAM)
V.80 and Rockwell Video Ready synchronous access modes between the modem and the host/DTE are provided for host-
controlled communication protocols, e.g., H.324 video conferencing applications.
Voice-call-first (VCF) before switching to a videophone call is also supported.
1.3.3 Host-Controlled Modem Software
Host-controlled modem software performs processing of general modem control, command sets, fax Class 1, AudioSpan,
DSVD, speakerphone, voice/audio/TAM, error correction, data compression, and operating system interface functions.
Configurations of the modem software are provided to support modem models listed in Table 1-1.
Binary executable modem software is provided for the OEM.
1.3.4 Downloadable Modem Data Pump Firmware
Binary executable code controlling MDP operation is downloaded as required during operation.
1.3.5 Hardware Interfaces
1.3.5.1 PCI Bus Host Interface
The Bus Interface conforms to the PCI Local Bus Specification, Production Version, Revision 2.1, June 1, 1995. It is a
memory slave (burst transactions) and a bus master for PC host memory accesses (burst transactions). Configuration is by
PCI configuration protocol.
The following interface signals are supported:
Address and data
32 bidirectional Address/Data (AD[31-0]; bidirectional
Four Bus Command and Byte Enable (CBE [3:0]), bidirectional
Bidirectional Parity (PAR); bidirectional
Interface control
Cycle Frame (FRAME#); bidirectional
Initiator Ready (IRDY#); bidirectional
Target Ready (TRDY#); bidirectional
Stop (STOP#); bidirectional
Initialization Device Select (IDSEL); input
Device Select (DEVSEL#); bidirectional
Arbitration
Request (REQ#); output
Grant (GRANT#); input
Error reporting
Parity Error ((PERR#); bidirectional
System Error ; bidirectional
Interrupt
Interrupt A (INTA#); output
System
Clock (PCICLK); input
Reset (PCIRST#); input
Clock Running (CLKRUN#); input
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RCV56HCF PCI/CardBus Modem Designer's Guide
ROCKWELL PROPRIETARY INFORMATION
1129
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