Invalid conference pin when using a speakerphone
Invalid code messages when entering a pin for a conference bridge can occur when using speakerphones. Getting an invalid code message happens to all of us and no matter what the reason, the most important thing is being able to get you into your conference.
Anything that interrupts the pin transmission of data can cause the receiving system to not get the correct conference code number. This can occur when background noise is present.
When using a speaker phone, place the phone on mute when entering the pin number to prevent any background noise impacting the tone transmission, or you may pickup the handset and enter the pin, then use the speakerphone.