Spec Sheet Preview: The Alpha Communications® / S.T.R.™ Model 13510 key / tool is used for installation and maintenance of many of our intercom systems and/or video-intercom systems, using the S.T.R.™ modular style door entry station(s). The 13510 key / tool is also used for installation and maintenance of the FS1000, FS1500, FSE1500, VFS1000 and VFS1500 series intercom and video-intercom stations (and others). It is also used with the 'MT' series mounting frames for door entry stations and master annunciator stations. While not required for syste …