Cisco VG410 Donanım Kurulum Kılavuzu - Sayfa 22

Ağ Geçidi Cisco VG410 için çevrimiçi göz atın veya pdf Donanım Kurulum Kılavuzu indirin. Cisco VG410 38 sayfaları. Voice gateway

Network Cabling and Interface Considerations

For additional information on the power requirements, see the Cisco VG410 Voice Gateway Datasheet.

Warning

Network Cabling and Interface Considerations

Network Cabling Considerations

The following are the cable types that are used in the Cisco VG410 Voice Gateway:

• GE cables (RJ-45 to RJ-45 straight-through cables)

• Analog voice cables (RJ-21)

Interface Considerations

When you run cables for any significant distance in an electromagnetic field, interference can occur between

the electromagnetic field and the signals on the cables. This has two implications for the installation of terminal

plant cabling:

• Unshielded plant cabling can emit radio interference.

• Strong electromagnetic interference (EMI), especially as caused by lightning or radio transmitters, can

If you use twisted-pair cables with a good distribution of grounding conductors in your plant cabling, emitted

radio interference is unlikely.

If you have cables exceeding recommended distances, or if you have cables that pass between buildings, give

special consideration to the effect of lightning strikes or ground loops. If your site has these characteristics,

consult experts in lightning suppression and shielding. The electromagnetic pulse caused by lightning or other

high-energy phenomena can easily couple enough energy into unshielded conductors to destroy electronic

devices.

Most data centres cannot resolve such infrequent but potentially catastrophic problems without pulse meters

and other special equipment. Take precautions to avoid these problems by providing a properly grounded and

shielded environment and by installing electrical surge suppression.

For advice on the prevention of electromagnetic interference, consult experts in radio-frequency interference

(RFI).

You need the following tools and equipment to install and upgrade the voice gateway and its components:

• Standard flat-blade screwdriver as required for attaching the brackets for rack mounting.

Cisco VG410 Voice Gateway Hardware Intallation Guide

Statement 1005

Circuit Breaker

This product relies on the building's installation for short-circuit (overcurrent) protection. To reduce risk of

electric shock or fire, ensure that the protective device is rated not greater than 20A.

destroy the EIA/TIA-232 drivers and receivers in the Cisco VG410 Voice Gateway.

Planning the Installation