So how do you know which cell phone an incoming call is from? Well, each line on the Xlink has a distinctive ring pattern, meaning an incoming call on Line 1 will sound different than an incoming call on Line 2. The appropriate blue light will also pulse differently depending on the line. Also, should you tire of using the Xlink in the middle of a call, you can press the appropriate line button and it'll disconnect the Xlink to the cell phone, and the audio will transfer automatically to your cell phone.
Other features of the Xlink include caller ID display and support for speed-dialing, voice mail, call waiting, and voice dialing--all from your standard desk telephone. Overall, we think it is excellent value for the money if you like the convenience of a cell phone but prefer the comfort and security of using a normal telephone. The value is especially noticeable when using it with a cordless phone, since you can just park your cell phone in the location with the best signal, then use the cordless phone around the house. Do note however, that Bluetooth signals sometimes interfere with Wi-Fi or 2.5Ghz cordless signals, so try to keep your devices far enough from each other. We tried ours with a 900Mhz cordless signal, and everything worked just fine.