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MUX Driver Software for AD278A and AD279A Cards

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Electronic download
Frequently asked questions
Product details and specifications

The Peripheral Components Interconnect (PCI) Multiplexer (MUX) is a high-speed serial communication multiple port product. It combines various signals for transmission over a single channel and provides intelligent-communication functions to off-load CPU serial communication processing tasks.

The AD278A PCI MUX 8-port adapter and AD279A PCI MUX 64-port adapter are compliant with the Restriction of Hazardous Substance (RoHS) standards.

Note: You must install patch PHCO_34779 or the superseding patch on HP-UX 11i v1 (B.11.11), and patch PHCO_34780 or the superseding patch on HP-UX 11i v2 (B.11.23). For more information about these patches, see the product installation guides and release notes.

What is in new in this version (AD278A/AD279A PCI MUX)?

This section describes the features of AD278A/AD279A PCI MUX serial adapters.

Common features (AD278A/AD279A)

  • Supports serial data transactions speed of up to 115.2 Kb/s with AD278A PCI MUX 8-port adapter and 38.640 Kb/s with AD279A PCI MUX 64-port adapter.
  • Supports both Itanium-based and PA-RISC based processor architectures that enhances overall system throughput by off-loading CPU communication bottlenecks.
  • Supports PCI 2.2 and 2.3 standards.
  • Supports both 3.3 V and 5 V systems.
  • Provides complete modem, hardware, and software flow control.
  • Provides heavy-duty surge protection on all pins for reliability.
  • Supports on-board IDT 3081 RISC processor with patented front end processor/operating system (FEP/OS).
  • Provides surge protection on all signals.
  • Supports full modem control and full hardware handshaking (Clear to Send (CTS), Request to Send (RTS), Data Set Ready (DSR), Data Terminal Ready (DTR), and Data Carrier Detect (DCD)) on all ports.

Features specific to AD279A PCI MUX 64-port adapter

  • Supports up to 4 port modules (for a maximum of 64 ports).
  • Supports 16 RS-232 asynchronous serial ports with RJ-45 or DB-25 male connectors.
  • External Bus Interface (EBI) provides power to port modules from bus.
    Note: Applications that use less than 32 ports do not need a power supply option.

Note: The AD278A and AD279A serial adapters are supported on HP-UX 11i v1 (B.11.11), HP-UX 11i v2 (B.11.23), and  HPE-UX 11i v3 (B.11.31) operating systems. The AD279A PCI MUX 64-port adapter can support 2 port modules or up to 32 port configurations without the port module power supply. The port module power supply is required on the third port module and the fourth port module or 33 through 64 port configurations.

Standards and conformance

The current AD278A/AD279A PCI MUX product is compliant with the Restriction of Hazardous Substance (RoHS) standards and supports the RS-232 connections.

Product documentation

The following documents are available at

  • HPE AD278A and AD279A PCI Multiplexer Release Notes
  • HPE AD278A and AD279A PCI Multiplexer Support Guide
  • HPE AD278A PCI 8-Port Serial Multiplexer Installation Guide
  • HPE AD279A PCI 64-Port Serial Multiplexer Installation Guide

Note: The downloadable driver supports both the AD278A and AD279A cards.

July 2013

Additional product information
Product #: AD279A
Version: 11.11.1007,11.23.1202,11.31.1503
Software specification: HP-UX 11i v1 (PCIMUX-00_B.11.11.1007_HP-UX_B.11.11_32_64.depot)
HP-UX 11i v2 (PCIMUX-00_B.11.23.1202_HP-UX_B.11.23_IA_PA.depot)
HP-UX 11i v3 (PCIMUX-00_B.11.31.1503_HP-UX_B.11.31_IA_PA.depot)