Nokia 7000 Series Benutzerhandbuch
6800/7000 Series - Distribution and Routing Products Installation and Opertion Manual
13
Specifications
Chapter 2: DNH-6800 DigiNet Hub Module
Specifications
Total Power Dissipation
DigiNet Ports
Item
Specification
Maximum (heavy traffic)
250 mA @ 6.5V
(positive rail 1.50 W, negative rail 0.3 W,
total 1.8 W)
total 1.8 W)
Minimum (no traffic)
75 mA @ -6.5V
Item
Specification
Number
1 (named Channel 0)
Type
75
W BNC connector, unterminated
Location
Auxiliary input B
Number
8 (named Channel 1 through Channel 8)
Type
75
W BNC connector (with on-board
termination)
Location
Backplane connector, Outputs 1 through 8
Network Protocol
LonTalk CSMA/CD with proprietary
transceiver
transceiver
Signaling
1.25 Mb/s, Manchester encoded
Levels
1 V
Return Loss
Channel 0:
• 28 dB or better @ 2.5 MHz
• 22 dB or better @ 5.0 MHz
Channels 1-8:
• 45 dB or better @ 2.5 MHz
• 40 dB or better @ 5.0 MHz