Dec. 7, 2007
Businesses Save Money with Toshiba's New
SIP Trunking Feature
For business trying to save money on telecommunications tariffs, conventional technology requires
separate services for data and voice. This can be inefficient because data isn't carried over the un-used
voice service, and voice isn't carried over the available data service. Session Initiation Protocol (SIP)
Trunking allows the two services to be combined onto a single more efficient service. Unlike gateway
based solutions, Toshiba's MIPU card with SIP trunking costs less and allows SIP Trunking to be
supported natively in the phone system along with remote IP phones, softphones, WiFi phones, IP based
voicemail and IP based ACD applications.
SIP Trunking allows the CIX to get PRI like services from an Internet Telephony Service Provider using
Session Initiation Protocol.
SIP (Session Initiation Protocol) is an application layer protocol used for establishing sessions in an IP
network. SIP is a very rich and extensible protocol and, similar to HTTP and SMTP, SIP is a text-based
protocol. The power of SIP lies in the fact that it allows a user on a SIP enabled device to communicate
with other users on SIP enabled devices (IP PBX, SIP phone, SIP Softphone) regardless of geography.
SIP Trunking harnesses the power of the SIP protocol to route a VoIP call over the carrier's IP backbone to
any IP address worldwide.
Toshiba implements SIP trunking using our new MIPU card. The MIPU is designed from the ground up as
a VoIP card able to support IP stations, Strata Net IP, and now SIP trunking. With the SIP Trunking
capability of the new MIPU card, companies are no longer committed to having to purchase different types
trunk cards and the bundles of physical wires to host analog, PRI and BRI trunks. With the MIPU
implementation of SIP Trunking, companies are able to leverage their existing Toshiba CIX R4.x (and later)
PBX systems with just the purchase of MIPU cards, an update to R5.10 MS18 software, and
corresponding license. SIP Trunking is meant to simplify IP PBX trunking capability by replacing all of
these traditional PSTN lines with one SIP Trunking device hosted by SIP Trunking provider on the internet.
For companies that already have a networking infrastructure, there are no additional networking devices
required to implement SIP Trunking.
In essence, SIP Trunking offers ISDN-like features over a data connection (i.e. T1 circuit). However, unlike
a traditional T1 circuit, a SIP Trunking enabled circuit does not have to be physically provisioned and
divided to separate the voice channels from the data channels.
© Copyright 2007
Toshiba America Information Systems, Inc.
Telecommunication Systems Division
9740 Irvine Blvd., Irvine, CA 92618-1697 (949) 583-3700
© 2007 All rights reserved