Required Distances between Equipment
CAUTION
Maintain the distances listed below between equipment in order to prevent noise, interference or the
disconnection of a conversation. (The distance may vary depending on the environment.)
Equipment
Distance
CS and office equipment such as a computer, telex, fax
machine, etc.
More than 2 m
PBX and CS
More than 2 m
Notice
If multiple CSs cover the same area, the phone connection may become noisy or the number of possible
simultaneous calls with PSs may decrease due to interference between the CSs. For details, refer to
"5 Site Survey Using the KX-TCA175/KX-TCA256/KX-TCA275/KX-TCA355/KX-TCA364—Testing the
Radio Signal Strength".
The required distance between CSs may vary depending on the environment of the installation site and
conditions in which the wireless system is used. Conduct a site survey to determine the appropriate
distance.
RF Specification
Item
Description
Radio Access Method
MultiCarrier TDMA-TDD
Frequency Band
1880 MHz to 1900 MHz
*1
Number of Carriers
10
*2
Carrier Spacing
1728 kHz
Bit Rate
1152 kbps
Carrier Multiplex
TDMA, 24 (Tx12, Rx12) slots per frame
Frame Length
10 ms
Modulation Scheme
GFSK
Roll-off factor=0.5 50 % roll-off in the transmitter
Data Coding for Modulator
Differential Coding
Voice Codec
32 kbps ADPCM (CCITT G.721)
Transmission Output
Peak 250 mW
*1
If the suffix of your PBX model is BX, TW, or XE, the value is 1880 MHz to 1895 MHz.
*2
If the suffix of your PBX model is BX, TW, or XE, the value is 8.
CAUTION
•
The CS should be kept free of dust, moisture, high temperature (more than 40 °C), low temperature
(less than 0 °C), and vibration, and should not be exposed to direct sunlight.
•
The CS should not be placed outdoors (use indoors).
•
The CS should not be placed near high-voltage equipment.
•
The CS should not be placed on a metal object.
Quick Installation Guide
9
1 Overview