Nokia 7000 Series Benutzerhandbuch
6800/7000 Series - Distribution and Routing Products Installation and Opertion Manual
11
Chapter 2
DNH-6800 DigiNet Hub Module
Overview
The DNH-6800 DigiNet Hub module connects up to nine separate
DigiNet cable segments into one logical control network, making it
possible to span large physical distances and support a greater number
of unit nodes without degradation of signal quality due to attenuation
and return loss.
DigiNet cable segments into one logical control network, making it
possible to span large physical distances and support a greater number
of unit nodes without degradation of signal quality due to attenuation
and return loss.
A data stream originating from a node on any one of the nine DigiNet
segments is automatically detected, reclocked, reshaped, and
retransmitted to all other segments by the DNH-6800. DigiNet’s Carrier
Sense Multiple Access with Collision Detect (CSMA/CD) protocol is
supported by implementing independent collision detection on each
channel and by a jamming mechanism that propagates a collision event
detected on a transmitting channel to transmitting nodes on all other
channels (see Figure 2-1 “DNH-6800 Block Diagram Flow” on page 12).
segments is automatically detected, reclocked, reshaped, and
retransmitted to all other segments by the DNH-6800. DigiNet’s Carrier
Sense Multiple Access with Collision Detect (CSMA/CD) protocol is
supported by implementing independent collision detection on each
channel and by a jamming mechanism that propagates a collision event
detected on a transmitting channel to transmitting nodes on all other
channels (see Figure 2-1 “DNH-6800 Block Diagram Flow” on page 12).
Specifications and designs are subject to change without notice.