simplified message desk interface (SMDI)

A PBX feature that provides a simple interface for com-

munications between a phone system and a voice messaging system.The PBX sends an SMDI message in advance of each call, advising the voice messaging system of the line that it is using, the type of call that it is forwarding (e.g., call forward, call forward busy or call forward no answer), and the source (calling number) and destination (called number) of the call. SMDI enables the voice messaging system to process the forwarded call more intelligently by accessing the correct personalized greeting associated with the correct mailbox. If the phone is so equipped, the voice mail system can turn on a message waiting light. Alternatively, the voice mail system can send stuttered dial tone in place of normal dial tone when the station user picks up the receiver to place a call, can ring the phone periodically, or use some other method. See also dial tone and PBX.

• Serial Storage Architecture (SSA)
• server
• service
• service access point identifier (SAPI)
• service creation element (SCE)
• Service Level Agreement (SLA)
• service management system (SMS)
• service mark (SM)
• service node
• service-oriented architecture (SOA)
• service profile identification (SPID)
• service set identifier (SSID)
• service switching point (SSP)
• Sesame (Secure European System for Applications in a Multivendor Environment)
• session
• Session Description Protocol (SDP)
• Session Initiation Protocol (SIP)
• Session Initiation Protocol (SIP) for Instant Messaging and Presence Leveraging Extensions (SIMPLE)
• Session Layer
• set handler
• set-top box
• severely errored cell block ratio (SECBR)
• SFTP (Shielded Foil Twisted Pair)
• SGCP (Simple Gateway Control Protocol)
• SGML (Standard Generalized Markup Language)