A:AnswerArnie - The VTech CS6909 is accessory handset compatible only to the VTech models CS6919/CS6929/CS6949 series. The compatible accessory cordless handset of the IS8151-5 is the model IS8101. The base is expandable up to 12 handsets. Thank you! - VTech Support
A:Answerif the question has to do with the ability to BLOCK calls, the answer is YES. If the question has to do with the user-built call directory, the answer is YES.
A:AnswerSam - The compatible accessory cordless handset for the VTech CS5329-3 is the model CS5309. The telephone base supports a maximum of five devices. The CS6909 is an accessory cordless handset compatible only to the models CS6919/CS6929/CS6949 series. Thank you! - VTech Support
A:AnswerSanju - If you have the VTech CS6929 and CS6929-3 base connected to the same line, the cordless handset from one base will not communicate with the handset from another base. Both bases will work as a stand-alone phone. However, you can deregister the HS from one base and register it to another base so they would communicate with each other. You can also add the CS6909 accessory handset. The telephone base is expandable up to five handsets. Thank you! - VTech Support
A:AnswerRock - The VTech CS6909 is the compatible accessory cordless handset for the CS6949. The telephone base is expandable up to five cordless handset. Thank you! - VTech Support
A:AnswerJimmy - The VTech CS6909 requires a main base to work. The compatible main base of the accessory handset are the models: CS6919/CS6929/CS6949. The main base is designed to work on analog, digital or VOIP residential type of service. Thank you! - VTech Support
A:AnswerHi - The compatible accessory cordless handset for the CS5119 is the model CS5109. The CS6909 is an accessory cordless handset compatible only to the models CS6919/CS6929/CS6949 series. Thank you for your interest! - VTech Support