Medias Mediatrix 1204, Reference Manual

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Chapter 1 - Installation Overview
4 Mediatrix 1204
Overview
The Mediatrix 1204 is an analog gateway that allows connectivity between the SCN and a VoIP network. This
way, an IP-based telephony system can be linked to the SCN world through up to four standard telephone
lines or analog PBX extensions.
This version of the Mediatrix 1204 uses the Session Initiation Protocol (SIP), which is a protocol for
transporting call setup, routing, authentication, and other feature messages to endpoints within the IP domain.
About the Mediatrix 1204
The Mediatrix 1204:
Merges voice and data traffic onto a single unified network. Carrying telephone traffic over data
networks uses less bandwidth (as compared to telephone trunks), resulting in a more cost-
effective network solution.
Easily integrates with existing telephone equipment. It converts any conventional analog
telephone or fax machine into an Internet device.
Bypasses long-distance toll charges for realized savings.
Supports 10 Mb/s and 100 Mb/s Ethernet networks.
Upgrades software easily for future enhancements.
Uses the latest standards in Internet Telephony.
• SIP protocol for call management
• T.38 for fax relay
Supports the following Codecs:
• G.711 (µ-law, A-law)
• G.723.1A
• G.726
• G.729 A
• G.729 A rev. B
• T.38 (fax) over UDP or TCP
Supports Quality of Service technologies.
• Differentiated Services (DS) Field
• IEEE 802.1q user priority tagging
Offers an intuitive Web-based management interface to simplify operation and support.
Placing a Call
The Mediatrix 1204 is a gateway between the SCN world and IP world.
You can place a call from a SCN telephone by dialing the number corresponding to one of the SCN lines or
analog PBX extensions connected to the Mediatrix 1204. The unit plays a second dial tone. You can then dial
the number to reach on the IP side.
You can also place a call from any endpoint connected on the network. The Mediatrix 1204 contacts a SIP
server such as the IP Communication Server. The server then looks through its internal database to translate
the dialed number to a corresponding IP address. If none exists, the server locates a gateway (which can be
another Mediatrix 1204) for placing the call on the SCN.
The Mediatrix 1204 can handle a call from the SCN in two ways (can be set for each line).
Every call can be routed to a pre-determined alias which, for instance, can be an automated
answering system.
The call can be answered and a second dial tone (IP dial tone) is presented to the calling party.
The number dialed at this moment is validated by the SIP server and then routed accordingly.
You can dial on a telephone/fax machine connected to the Mediatrix 1204 as you normally do. Please refer to
“Chapter 22 - Telephony Features” on page 251 for more information and call processes examples.