Canon Pixma TS8700 Series Online Manual page 436

Step 3 : If the Solution Tool Does Not Solve the Problem.
Check that Enable bidirectional support is selected in Ports sheet of Printer
Check 1
properties dialog box(Windows).
If not, select it to enable bidirectional support.
Make sure security software's firewall is off.
Check 2
If your security software's firewall is on, a message may appear warning you that Canon software is attempting to
access the network. If this warning message appears, set security software to always allow access.
If you are using any programs that switch between network environments, check their settings.
If printer is connected to AirPort Base Station via Wi-Fi, make sure you use
Check 3
alphanumeric characters for network name (SSID). (macOS)
If your network name (SSID) contains characters other than single-byte alphanumeric characters, the connection
is not established properly. Change the network (SSID) to use only single-byte alphanumeric characters.
Solve network troubles with the printer's diagnostic functions.
Check 4
See below.
Solve Network Troubles with The Printer's Diagnostic Functions
Related Topics
Network Communication Problems
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