HP 200 Series Services And Applications page 27

Architecture and Technology
Router 650 Hardware
Timer This generates interrupts and internal clocking for WAN ports.
Console Port Controller
National's SONIC
LAN and WAN Controller Coprocessors
(Systems-Oriented Network Interface Controller) is a second-generation
Ethernet controller that integrates a fully compatible 802.3 encoder and
decoder. The token ring coprocessor is Texas Instruments' TMS 380
C16/04, TMS 380 C25, or TMS 380 C26. They support the 4-Mbit/s and
16-Mbit/s data rates as well as universal and local ring addressing.
A Motorola FDDI chip set is used for the dual-attached stations on FDDI
ports. The MK5025 by SGS Thompson is the WAN coprocessor for serial
frame formatting, such as frame delimiting with flags and FCS (frame
check sequence) generation and detection. Other information about
LAN and WAN ports is found in the "Features of HP Routers" product
note in this book, and in the installation guides for your hardware.
Packet RAM Each LAN or WAN coprocessor stores packets received
from the line (the network medium) into packet RAM, and transmits
packets from packet RAM to the line.
Additionally, there is reset and voltage supervisor circuitry that will reset the
router either upon power-up, under low-voltage conditions, or when the
Reset button is pressed.
Router 650 Hardware
The HP Router 650 uses a compact table or rack-mountable chassis,
illustrated in figure 2. For other detailed illustrations of the router, see its
Installation Guide.
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