As with other Nortel telephones, it contained a clearly defined color-coded red Hold key, orange Release (RLS) key and a grey Feature key. RLS helps hanging up a call without having to depress the handset cradle. During loudspeaker paging announcements with the telephone, the RLS key releases silently. The Feature keys help accessing many system features with one single Feature Code.
Small business phone systems allow employees, business partners, and customers to conduct business using combinations of video, voice, data, and mobility applications and so on.
These small business phone systems allow clients to access the following applications quickly and easily. These are Videoconferencing, Mobile soft phones, Voicemail, Database queries, Customer information, Small business phone systems can be feature rich which include Paging, Intercom Voicemail, Automated attendant, “Presence" technology; Hold interactive meetings and WebEx solutions; Help your employees be more mobile with Cisco Unified Wireless IP Phones; Turn phone calls into video calls ,Capacity for 16 voicemail or automated calls at once, Message notifications by e-mail, text message, or phone, Interactive voice response (IVR) features and many other feature.
Voice over IP telephone system including VoIP phone or IP Phone uses voice over IP (VoIP) technologies for placing telephone calls over an IP network, such as the Internet, in case of of the traditional public switched telephone network (PSTN).
Digital IP-based telephone service are designed with control protocols such as the Session Initiation Protocol (SIP), Skinny Client Control Protocol (SCCP) or various other proprietary protocols.
A hosted phone system is any of a range of a multiline telephone systems typically used in business environments,.A hosted telephone system differs from simply using a telephone with multiple lines .