MULTI-SITE NETWORKING OPTIONS.Esi-Link™ brings your remote offices closer together by joining multiple locations, whether across town or across the country, into what effectively is one big ESI system. Connect up to 100 locations across your WAN or over the Internet without dedicated lines or long-distance toll charges.ESI-EXCLUSIVE VIRTUAL ANSWER.™ESI’s unique Virtual Answer™ lets you use special greetings to help you courteously handle high call volume, based on call order. Even if you are already on a call, you can redirect a second incoming call to a special, personalized greeting with one touch. Virtual Answer can help you minimize lost calls and improve customer satisfaction.EASY, SECURE MAINTENANCE.Perform system maintenance via modem, direct connection, or the LAN/WAN. Your system administrator (or other authorized personnel) can also use convenient ESI software to manage system settings. ESI systems are fully self-contained, for higher reliability and security.CONVENIENT IP PHONE CHOICES.ESI’s desktop IP phones provide on-site  functionality, both in the office and in most sites with Internet access. ESI desktop IP phones’ remote capabilities are perfect for satellite offices. Prefer a cordless IP set? Choose an ESI Cordless IP Handset II (local IP or remote IP version). Often on the road? Use the optional, PC-based VIP 7 Softphone.4