Cable Types; Distance Limitations For Interface Cables; Gigabit Ethernet Maximum Distance; Fxs Analog Voice Port Maximum Distance - Cisco VG350 Installation Manual

Distance Limitations for Interface Cables

Cable Types

The cable types that are used are dependent on the Cisco VG350 Voice Gateway that you are using. For
more information, see the
Specifications and Information" section on page
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•
Distance Limitations for Interface Cables
When planning your installation, consider distance limitations and potential electromagnetic
interference (EMI) as defined by the Electronic Industries Association (EIA). Distance limitation
information is included for the following VG ports:
•
•
•

Gigabit Ethernet Maximum Distance

The maximum segment distance for Gigabit Ethernet is 330 feet (100 meters) (specified in IEEE 802.3).

FXS Analog Voice Port Maximum Distance

The maximum distance is established by a total allowable loop resistance, including the phone or
terminal equipment, of 600 ohms.

FXS-E (Extended loop) Analog Voice Port Maximum Distance

The maximum distance is established by a total allowable loop resistance, including the phone or
terminal equipment, of 1400 ohms.
Typically, a 26 AWG wire is equal to 81.6 ohm/Kft and 24 AWG wire is equal to 51.3 ohm/Kft.
Note
Cisco VG350 Voice Gateway Hardware Installation Guide
3-4
"Interfaces and Service Capabilities" section on page 1-3
GE cables (RJ-45 to RJ-45 straight-through cables)
Analog voice cables (RJ-21)
Gigabit Ethernet Maximum Distance, page 3-4
FXS Analog Voice Port Maximum Distance, page 3-4
FXS-E (Extended loop) Analog Voice Port Maximum Distance, page 3-4
Chapter 3
A-1.
Planning Your Installation
and "Cable
OL-25970-01