Voip Overview; Itp 5100 Series Keyphone Overview - Samsung Officeserv 7100 Technical Manual

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OfficeServ 7100 SPECIAL APPLICATIONS
TECHNICAL MANUAL PART 2 JANUARY 2009

VoIP Overview

VoIP is transported by the OfficeServ 7100 MGI utilizing the standards based Internet
Protocol. This standard addresses the means of transferring voice, data, and images
through IP (Internet Protocol) networks. IP is the accepted protocol standard for
transporting data. With VoIP certain compression standards have also been adopted to
represent each second of voice with an amount of bandwidth. The OfficeServ 7100 MGI
can utilize G.711, G.729A, G729 or G.723 standards voice compression codec's (card
dependant). This allows for a selectable 64kbps, 8Kbps or 6.3Kbps bandwidth use
when preparing voice compression for IP transport on a particular network.
Compression is used to reduce the digitized voice into a smaller bandwidth that can be
carried in smaller packets. The MGI can determine the compression method for each
individual call setup. There is also a certain amount of frame/packet overhead in each
compression channel. 64Kbps of bandwidth can support 4~5 calls simultaneously.
This can vary depending on efficiency features like codec selection, Silence
Suppression and Multiframe counts. Unlike switched networks, VoIP connections use
the packet switching method and consist of a sequence of numbered of data packets.
Since voice conversation is usually considered "real time" these packets need to be
delivered in a consistent manner with minimal delay.
In any IP network environment, packet transfers are subject to delays and/or loss. If
these delays are great, the voice quality will deteriorate severely. The Ethernet data
traffic and network topology should be a consideration when applying VoIP transport.
Network congestion does affect call quality in any VoIP application.

ITP 5100 Series Keyphone Overview

The Samsung ITP 5100 series IP keyphones provide full iDCS keyphone functionality
locally or remotely on an IP network. The unique ITP keyphone instruments
communicate with the OfficeServ 7100 system in a proprietary IP message format to
emulate full keyphone functionality. Working in conjunction with the MP10/MP10a and
the MGI, the ITP keyphone can access all station features and trunk facilities on the
OfficeServ 7100 system. The ITP keyphone can function on private networks (Intranet)
or public IP networks (Internet). ITP keyphones support DHCP services and can also
function behind NAT (Network Address Translation) routers. All of the ITP models
support PoE (Power Over Ethernet, IEEE 802.3af). This means that they can be
powered by any PoE LAN switch instead of the AC adapter. Of course they can still be
powered by the AC adapter connection to an AC outlet. There are three types of ITP
5100 series keyphones:
2.6.2