Other details inter flat communication with cli caller line identification on cli telephone tells you who is calling even, Before lifting the handset. Advanced hotline gives you the ability to get connected to any programmable extension. Just lift the handset and wait to get connected to say security without having to dial. Auto call back if the extension you are making an effort you are, Is busy without to keep trying it over and over the busy extension will ring back as soon as it becomes free. Call forwarding if you are visiting some other flat, All your calls can be diverted to the visiting extension thereby ensuring that you do not miss out on important calls. Super conferencing involving unlimited number of extension facilities teleconferencing of committee members etc. Call pick up an unattended ringing extension can be answered form your non, Ringing phone. Key features flexible numberingunlimited conferencepanic alarm on single pair intercom cable no extra pair of wire required cable cut alarm on single pair intercom cable chairman s broadcast vendor arrival announcement to all extensions simultaneously voice field programmable remote display unit for intercom statue / panic & cable cut indications paging interfacepower relay port for hooter / porch lightfour independent security groupsserial port for pc interfacetone / pulse switchableextension to extension calltwo digit access to security / reception / operatorextension do not disturbextension to extension call barringhot line security / receptioncall forwardingwake, Up alarmemergency reportingdiscriminate ringingbarge inauto call backcall pick upboss, Secretary systemautomatic double check with the flat battery back, Up optional