Canon WFT-E6 Instruction Manual page 137

Notes for Using Multiple Wireless Transmitters
When multiple cameras with a wireless transmitter attached are

connected to one access point, make sure that the cameras' IP
addresses are different.
When multiple cameras with a wireless transmitter attached are

connected to one access point, the transmission rate drops.
When there are multiple IEEE 802.11n/g/b (2.4 GHz band) access

points, leave a gap of four channels between each wireless LAN
channel to reduce radio wave interference. For example, use
channels 1, 6, and 11, channels 2, 7, and 12, or channels 3, 8, and
13.
When IEEE 802.11n/a can be used (on the 5 GHz band), switch to
IEEE 802.11n/a (on the 5 GHz band) and specify a different
channel.
Security
If security settings have not been properly set, the following problems
may occur.
Transmission monitoring

Third parties with malicious intent may monitor the wireless LAN
transmissions and attempt to acquire the data you are sending.
Unauthorized network access

Third parties with malicious intent may gain unauthorized access to
the network you are using to steal, modify, or destroy information.
Additionally, you could fall victim to other types of unauthorized
access such as impersonation (where someone assumes an
identity to gain access to unauthorized information) or springboard
attacks (where someone gains unauthorized access to your
network as a springboard to cover their tracks when infiltrating
other systems).
To prevent these types of problems from occurring, be sure to
thoroughly secure your network.
Communication Function Setting Notes
137