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Power Tools 1993 October - Disc 1
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a3821471
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1992-05-09
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LAN/1000 Link and DDA, Technical Data
Local Area Network Interface Controller
Product Numbers 12076A and 12079A
The HP 12076A LAN/1000 Link and HP 12079A Direct Driver Access (DDA)
products provide the hardware, software, and documentation for customers
to connect an HP 1000 A-Series computer to a local area network (LAN).
The LAN/1000 Link product provides the interface between an
A-Series computer and an IEEE 802.3 local area network. The HP 12076A
enables an A-Series computer to communicate with other
A-Series computers at a 10 Mbits/second transfer rate along the network.
The product consists of a printed circuit assembly, a card connector
cable, an Attachment Unit Interface (AUI) cable, and an installation
guide. Interface driver and node management software are structured to
the RTE-A operating system (92077A) version 4.1 or later. The figure
below shows the 12076A as it connects to an IEEE 802.3 type 10BASE5
backbone ("thick") coaxial cable. The product can also be connected to
an IEEE 802.3 type 10BASE2 ThinLAN ("thin") coaxial cable via an
HP 28641A ThinMAU.
[Figure 1 (LAN/100 Link and DDA diagram) Caption: none]
The 12076A can connect to Ethernet Rev. 1 baseband local area networks
using an optional card connector cable. The LAN/1000 Link transmits and
receives both IEEE 802.3 and Ethernet Rev. 1 type packets.
The LAN/1000 Link product provides the signaling layer and the media
access control sublayer protocols as defined in the IEEE 802.3 and
Ethernet Rev. 1 standards. This capability allows the interface to
prepare packets for transmission by adding preamble and cyclic
redundancy check (CRC), transmit packets according to link access
protocol, receive incoming packets addressed to the node, and check them
for correctness before transmitting them to the host CPU. The LAN/1000
Link also provides diagnostic and link management functions such as
self-test, loopback, promiscuous mode addressing, and statistics
gathering. Higher level protocols are handled by the host system.
The Direct Driver Access (DDA) product provides the necessary
information to interface the user's customized networking software to
the driver contained in the LAN/1000 Link product.
Features
o Direct Driver Access
o 10 Mbits/s Burst Transfer Rate
o Single-card interface
o Frame size of 1500 bytes
o Operational compatibility with IEEE 802.3 and Ethernet Rev. 1
o Power (0.5 A at 12 V) for MAU
o Physical signaling layer and media access control sublayer
o 32 Kbytes of onboard RAM allowing buffering for both transmit and
receive packets
o Interface adds preamble, Source Address, and CRC to transmit packets;
strips preamble and CRC from receive packets
o Capable of receiving multiple back-to-back packets
o Provides for multicast, broadcast, and individual addressing
o Collection of Link Statistics (collided packets, bad packets, etc)
o Onboard loopback of transmit packets addressed to self
o Card configuration stored in nonvolatile memory
o Response packets for TEST and XID packets for specific DSAP
o Power-on self-test
o Environment: Class B
o EMC: will pass FCC, VDE level A
Communication Line Statistics
As packets are transmitted and received from the link, the interface
firmware tabulates occurrences of particular events and returns these
counts as statistics when requested. When reading the statistics, a user
has the capability of resetting them all. Good received packets, good
transmitted packets, good bytes transmitted, and good bytes received,
are all 32-bit unsigned integers. All other statistics are 16-it
unsigned integers.
The following statistics are collected:
o Interface firmware revision code (not resettable)
o Total number of good bytes transmitted
o Total number of good bytes received
o Total number of good packets transmitted
o Total number of good packets received
o Total number of errors on transmit
o Total number of bad frames received
o Total number of times no heartbeat was indicated after a transmission
o Total number of times a packet was missed due to a lack of resources
o Total number of memory errors
o Total number of receive framing errors
o Number of packets discarded by driver (on card)
o The number of packets received with a CRC error
o 802.3 length field errors
o Total number of times the transmission of a packet was completed after
2 to 15 retries
o Number of times exactly one retry was needed to transmit
o Number of times any packet was deferred while trying to transmit
o Total number of underflow errors on transmit
o Number of times the interface detected a late collision on transmit
o Number of times the carrier was lost when transmitting a frame
o Number of times the transmission of a frame failed after 16 retries
o TDR information from last valid TDR
User-Configurable Address
Each interface is shipped with a unique link level (node) address. In
order to allow the user the most flexibility, the nodal address may be
changed from the factory set address. This is an important feature for
OEMs who may want their devices to have specific addresses or may not
have software which can be easily updated as nodes are moved around in
the network.
Remote Forced Cold-Load Capability
The A-Series LAN interface supports Virtual Control Panel/Remote Forced
Cold-Load modes of operation. Hence, the host may be downloaded and
booted from a remote mode over the LAN.
Functional Specifications
General Characteristics
Topology: Bus
Network Medium: IEEE 802.3 type 10BASE5 backbone ("thick") coax
Maximum Distance Between Nodes per Segment: 500 meters (excluding
AUI cables)
Minimum Distance Between Nodes: 2.5 meters
Maximum Number of Nodes: 100
Maximum AUI Length: 42 meters
Transmission Characteristics
Transmission Mode: Baseband Digital
Access Methods: Carrier Sense Multiple Access with Collision
Detection (CSMA/CD)
Impedance: 50 ohms
Environmental Characteristics
Temperature:
Non-operating: -40 degrees C to +75 degrees C (-40 degrees F to
167 degrees F)
Operating: 0 degrees C to +70 degrees C (32 degrees F to 158
degrees F)
Relative Humidity: 5% to 95% humidity
Electrical Specifications
Maximum Power Consumption: (+5 V) 3 A, 15 watts; (+12 V) 0.5 A, 6
watts (with MAU attached)
Ordering Information
HP 12076A LAN/1000 Link
The HP 12076A Standard Product includes:
12076-60001 PCA A-Series LAN Unit
2076-63001 802.3 Card Connector Cable
2076-90001 Installation Manual
2076-90002 Node Manager User's Guide
0241-60102 Medium Attachment Unit
362-0819 Coaxial Cable Tap Kit
2254A 6-meter FEP AUI cable
HP 12076A Options
001 Substitutes an Ethernet Rev. 1 Card Connector Cable
for the standard IEEE 802.3 compatible cable. The
option also deletes the AUI and MAU. Since there are
grounding differences between the two types of
hardware, it is important to distinguish the type of
media hardware being used at a node. If the media
access hardware conforms to Ethernet Rev. 1 then
Option 001 should be ordered. Option 001 substitutes
an Ethernet Edge Connector cable for the standard
802.3 compatible cable.
002 Update option which will delete everything except the
latest firmware stored on EPROMs. Customers on support
subscriptions will receive updates automatically.
241 Deletes the 6-meter FEP AUI cable and the Medium
Attachment Unit.
Note: Software for Node Management interface and driver are
incorporated into the RTE-A operating system (HP 92077A) version 4.1 or
later.
The HP 12079A includes:
12079-90001 Driver Reference Manual
Ordering Related Products
HP 30241A Medium Attachment Unit can be ordered separately through
HP Direct Marketing Division. This product is for attachment to 802.3
backbone "thick" coax cable only.
HP 28641B ThinMAU with integral 1-meter AUI cable is available through
HP Direct Marketing Division. This product enables the LAN interface to
attach to an IEEE 802.3 type 10BASE2 ThinLAN coaxial cable.
Attachment Unit Interface (AUI) Cables are available through
HP Direct Marketing Division only. They come in various sizes up to a
maximum length of 48 meters. There are PVC and Teflon cables available.
PVC should be used when the cable will be installed in a conduit. Teflon
(FEP) cable should be used when installing into ceilings and walls. Due
to local and municipal codes, it is the customer's responsibility to
determine proper cable selection. These AUI cables cannot be used with
the HP 28641A ThinMAU.
IEEE 802.3 Coaxial Cable and Installation Kits are available through
HP Direct Marketing Division for both "thin" and "thick" coaxial cable
environments. The lengths of the coaxial cable were determined to be the
best to minimize impedance problems when connecting multiple cables.
From HP Networking Communications Specifications Guide,
5091-3821E, 9205, p 471
Associated files: la3821dz.gal, la3821dz.plt
LAN/1000 Link and DDA, Technical Data