A:AnswerNot sure of the difference but know the cs6909 Handset is meant to be registered with Base Models CS6948, CS6949 , CS6919 and CS6929. For more information go to the vtech web site to download manuals for your system.
A:AnswerHello. The VTech CS6229-3 uses VTech CS6209 Accessory Handsets. Please note that the CS6229 series has been discontinued, so there may be limited availability of those handsets. Thank you.
A:AnswerMegs - We are sorry to hear that your VTech CS6929 does not work as expected. Make sure that the AC adapter is securely plugged in on both ends. You can also reset the telephone base by disconnecting the AC adapter from the power. Reconnect the power after a minute then test again. If this does not help, please contact our Consumer Sales and Service Center between the hours of 9:00 AM and 3:00 PM Monday through Friday at 1-800-595-9511.
Thank you,
-VTech Support
A:AnswerCharlie - The VTech CS6909 is accessory handset compatible only to the VTech models CS6919/CS6929/CS6949 series. The compatible accessory cordless handset of the IS8151 is the model IS8101. Thank you! - VTech Support