Ubee Interactive
Deploying and Troubleshooting the Wireless Network
Ubee DVW326 Advanced Wireless Voice Gateway Subscriber User Guide • March 2014
84
To determine the received signal strength, refer to
Using the Access Control Option on
page 78
and review the
RSSI
value. A receive signal strength indicator between 0 to -64
dBm is considered optimal. Levels of -67dBm and lower (for example, -70, -80, etc.) have
a downward impact on wireless data throughput.
Estimating Wireless Cable Modem to Wireless Client Distances
The information in this section helps you to determine how far a wireless access point (the
DVW326) can be placed from wireless client devices. Environmental variances include the
capabilities of wireless clients and the types of material through which the wireless signal
must pass. When the DVW326 and wireless clients reach the distance threshold between
each other, network performance degrades.
Steps
To determine wireless cable modem placement:
1. Connect a wireless client to the wireless cable modem. Refer to
Connecting Devices to
the Network on page 14
if needed.
2. Place the wireless client at around one meter (three feet) away from the DVW326.
3. Obtain the
RSSI
value for the connected client. Refer to
Using the Access Control
Option on page 78
. This value is used in the formula further below.
4. Use the following table to determine what materials the wireless signal must travel
through to reach the desired wireless coverage distance.
Attenuation Considerations at 2.4GHz
Material
Attenuation
Connector/Cable
3.5dB
Free Space
0.24dB / foot
Interior Drywall
3dB to 4dB
Cubicle Wall
2dB to 5dB
Wood Door (Hollow/Solid)
3dB to 4dB
Brick, Concrete Wall (Note 1)
6dB to 18dB
Glass Window (not tinted)
2dB to 3dB
Double Pane Coated Glass
13dB
Bullet Proof Glass
10dB
Steel / Fire Exit Door
13dB to 19dB