NEC ElectraElite 48, Руководство по аппаратному обеспечению системы

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Issue 6 Electra Elite
5 - 86 Installing Electronic Telephone Units
5.9 VDH2(8)-U( ) ETU
5.9.1 Description
The VDH2(8)-U( ) ETU integrates both LAN and station
cabling. This is a standard ESI ETU with additional circuitry
for the LAN integration function.
Key Telephones are connected to the VDH2(8)-U( ) ETU
using a VDD-U Unit.
Each VDH2(8)-U( ) ETU has a built-in HUB facility with
eight ports (IEEE 802.3 10Base-T).
A VDD-U( ) adapter is required at each digital station or
Attendant Console. Refer to
3.11.1 Installing a VDD-U Unit
on a Multiline Terminal in Chapter 7 on page 7-38 .
5.9.2 Specifications
Refer to Table 5-41 VDH2(8)-U( ) ETU Specifications .
Table 5-41 VDH2(8)-U( ) ETU Specifications
Description Specifications
General Specifications
Access Method CSMA/CD Method (IEEE 802.3)
Transmission Speed 10 Mbps
Transmission Interface 10Base-2: 1 port
10Base-T +
D
term
Interface: 8 ports
Transmission Interface Connectors
10Base-2 BNC (coaxial cable)
10Base-T + Dterm Interface RJ-45 (modular for 10Base-T)
Transmission Cable Type and Maximum Cable Length
10Base-2 Coaxial Cable – 606.8 feet (185 meters)
10Base-T +
D
term
Interface
Twisted Pair Cable (LAN Category 3 or
higher) – 328 feet (100 meters) for
10Base-T technology
.