Nokia 6800 Series Manual do Utilizador descarregar pdf (Página 40)

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)

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

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

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Nokia 6800 Series Manual do Utilizador Página 40