The TL-2000 from Aiphone is a stainless steel flush mount entry panel that can be programmed to call up to 2,000 different tenants/residents using their existing telephone numbers. The tenants will be able to answer a call from their visitor and unlock the entry door by entering a code on their phone. Up to 2,000 unique access codes can also be programmed into the system for tenant entry. A maximum of 5 entry panels can share the same telephone line. The TL-2000 is programmed using a PC with the supplied software. It can be programmed on-site using the supplied RS232 cable or off-site using a modem.