Microtronix Access User Guide
9 SIP/SMDI MWI Gateway
The MWI Gateway provides routing and translation of Message Waiting Indicator (MWI) notifications
from VoIP Unified Messaging Servers and legacy Voice Mail Systems to one or more legacy or VoIP
telephone switches/ PBXs.
The MWI Gateway receives MWI input from either:
● Legacy VMS via SMDI messages over serial interface or TCP/IP socket
● VoIP UMS/VMS via SIP Notify messages over TCP/IP or UDP/IP sockets
Routing of MWI messages to multiple switches may be accomplished with:
● Domain name in the SIP Notify request URI
● Telephone number in the SIP Notify request URI
● Telephone number in the SMDI OP or RMV messages
MWI output (with message translation where necessary):
● SMDI via serial RS232 port directly to legacy PBX
● SMDI via TCP/IP to remote terminal server connected to serial port of legacy PBX
● SMDI via TCP/IP to PBX supporting SMDI over TCP
● Sip Notify (message-summary) via UDP/IP to VoIP PBX
9.1 SMDI to SIP Translation
When there is only single VoIP switch/PBX destination configured, routing is unnecessary and the MWI Gateway
acts as a simple SMDI to SIP translator.
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