8-port Serial PCI ACC Multiplexer Installation & Service Guide (30291-90508)

10 Chapter1
Overview
Multiplexer Overview
8-Port PCI Multiplexer Maximum Baud Rates
Although the ACC MUX card can handle rates above 19.2 Kbps for
RS-232 and 64 Kbps for V.35, it is the customer’s responsibility to
ensure that the cable type and length are chosen appropriately.
Per Port RS-232 128 Kbps
V.35 128 kbps
Aggregate RS-232 1024 Kbps
V.35 1024 kbps
Multiplexer Architecture
The 8-port PCI ACC Multiplexer is an intelligent microprocessor-based
interface that supports a wide variety of serial data communication
protocols. The architecture allows the protocols to be implemented as
downloaded modules which enhance the flexibility of the interface. The
multiplexer has sufficient memory to provide data buffering and
configuration tables, as well as space for multiple downloaded protocol
modules. Figure 1-1 shows a functional block diagram of the
multiplexer card.
Figure 1-1 Block Diagram of the 8-Port PCI ACC Multiplexer
Primary
PCI Bus
64K
ROM
SIPEX 505
Transceiver
SIPEX 505
Transceiver
SIPEX 505
Transceiver
SIPEX 505
Transceiver
DSCC4
Serial Controller
Secondary
PCI Bus
16mb
RAM
Intel i960RD
I/O Processor
PCI Bridge
lattice
1032
PLD
SIPEX 505
Transceiver
SIPEX 505
Transceiver
SIPEX 505
Transceiver
SIPEX 505
Transceiver
DSCC4
Serial Controller