Download ESX 2008 VoIP

What is VoIP and how can it effect your business?
Sascha Kylau
Business Development Manager, Central Station &
Communication Products - Global
What is VoIP?
Voice over IP or VoIP is a term used in IP telephony for a set of
facilities that use the Internet Protocol (IP) to deliver voice information
 In general, this means sending voice information in digital form in
discrete packets rather than in the traditional circuit-committed
protocols of the public switched telephone network (PSTN)
 A major advantage of VoIP and Internet telephony is that they avoid
the tolls charged by ordinary telephone service
Different Types of VoIP
AT&T/Verizon IP Flex circuits (IP T1’s)
Verizon FIOS (Fiber to the premises)
Packet Switched Networks
•UK (CN21), Spain, Canada
Cable (Digital Phone) Facilitated VoIP
Internet VoIP (Vonage) Non-Facilitated VoIP
AT&T/Verizon IP Flex Circuits
IP Flex T1
•IP Flex T1 is specifically designed for small businesses that are looking for a costeffective way to carry voice and data over the same connection and require only
standard voice telephony features.
•Can be custom built with specific features and codecs
Verizon FiOS
Fiber circuit right to the premise
Get bundled service (TV, Internet, Phone)
Digital to the outside of the house
Software upgrades are routinely performed (No service during this time)
Packet Switched Networks
Some countries are switching their entire phone network to an IP backbone and switches
UK (CN21)
Spain
Canada (Bell Canada)
Cable Digital Phone
Cable companies have their own voice over data product
They call it digital phone
They convert voice in to data packets using their own proprietary protocol (DOCSIS)
Data Over Cable Service Interface Specification is an international standard developed by
CableLabs
Internet VoIP
There are many different types of VoIP applications that use the Internet
•There are peer to peer PC applications such as Skype
•Applications that use MTA’s such as Vonage
•IP PBX applications that use the Internet/Intranet to make virtual extensions available
to companies with multiple offices without having to buy a switch for each office
Facilitated VoIP
SS7
Cable Network
Switch
PSTN Network
Cable
Modem
MTA
Alarm Panel
Central Station Receiver
The above figure shows the communication path through a facilitated Voice over IP
provider. In this example the alarm panel has a POTS connection from the MTA. The
MTA then converts the call into IP packets and sends the information across the provider
network through a cable modem to a server that is connected to an SS7 switch. The call
is then converted back to analog and sent across the public switch telephone network to
the receiver in the central station.
Non-Facilitated VoIP
SS7
ISP
VoIP Provider
Switch
PSTN Network
DSL
Modem
MTA
Central Station Receiver
Alarm Panel
The above figure shows the communication path through a Non-facilitated Voice over IP
provider. In this example the alarm panel has a POTS connection from the MTA. The
MTA then converts the call into IP packets and sends the information through the DSL
modem to the Internet using and then onto the VoIP provider network to a server that is
connected to an SS7 switch. The call is then converted back to analog and sent across
the public switch telephone network to the receiver in the central station.
What is a Codec?
Codec
•A codec is a device or program capable of encoding and/or decoding a digital data
stream or signal.
•Codecs are used to convert an analog voice signal to digitally encoded version.
•Codecs vary in sound quality, the bandwidth required, the computational requirements
etc. There many different types of codes that encode analog signals such as G711, G722,
G723, G726, G729 etc.
How can a Codec effect alarm transmission?
There are many different types of codecs and their characteristics differ as well for
example:
G.711
•G.711 is an ITU-T standard for audio compounding.
•It is primarily used in telephony
•G.711 emulates the circuit switched network and works best with alarm communication
•G.711 also uses the most bandwidth of any of the codecs which also makes it the least
cost effective
How can a Codec effect alarm transmission?
G.729
•G.729 is mostly used in Voice over IP (VoIP) applications for its low bandwidth
requirement.
•G.729 is an audio data compression algorithm for voice that compresses voice audio in
chunks of 10 milliseconds.
•Music or tones such as DTMF or fax tones can only be transported reliably with this
codec using the RTP payload for DTMF Digits, Telephony Tones, and Telephony Signals
as specified in RFC 2833, and thus use G.711 or out-of-band methods to transport these
signals
Alternate Alarm Transmission Methods
GSM
•GPRS (DSC, Honeywell)
•SMS (Tellular, Uplink)
Radio
•Licensed/ Unlicensed (AES, KP Electronics)
Internet/Intranet
•TCP/IP (Honeywell, GE)
•UDP/IP (DSC, Bosch, DMP)
•VOIP Gateway products (NextAlarm.com, LoBeen etc.)
Using IP for Alarm Signaling
Pro’s for using IP
•Supervision of an alarm panel can be accomplished when using IP signaling
•Higher level of security
•Alarms can be received much quicker when using IP for communication than over
traditional POTS
•Much faster upload/download of the panel
Con’s for using IP
•If there is a power outage then a UPS on all network equipment that the communicator is
linked to is required
•The premise connection to the Internet/Intranet is only as good as the ISP being used
Using Digital Cellular or Radio for Alarm Signaling
Pro’s for using Cellular
•Can be run off of a battery so it will work during power outages
•Not effected by phone line cuts
Con’s for using Cellular
•Signal strength and coverage maybe an issue in certain areas
•Additional Cost
•Not conducive for all building environments and may require an external antenna
Using VoIP Gateway Technologies
Pro’s for using VoIP Gateway products:
•Use existing panel in the premise
•Acts like a phone line
•Upload/download the panel
Con’s for using VoIP Gateway products:
•Cost
•Power outages
•Reliability of ISP
•Added potential point of failure (Clearing center/software receiver)
Wrap Up
The Phone networks are changing
Increasing amount of technology options for sending alarms
POTS communication will not always work
Questions?
Glossary
•
VoIP (Voice over Internet Protocol)
–
•
Internet
–
•
NOC is the organization responsible for the day-to-day operations of the Internet', telecommunications or cable company component
networks
ISP (Internet Service Provider)
–
•
A private network inside a company or organization that uses the same kinds of software that you would find on the public Internet,
but only for internal use
NOC (Network Operations Center)
–
•
The vast collection of inter-connected networks that all use the TCP/IP protocols and that evolved from the ARPANET of the late 60's
and early 70's. The Internet now (July 1995) connects roughly 60,000 independent networks into a vast global internet
Intranet
–
•
A technology for transmitting ordinary telephone calls over the Internet using packet linked routes.
A business that provides subscriber-based access to the Internet. Subscribers can be individuals or businesses. ISP’s operate at the
fourth or lowest level of the Internet.
Packet Switching
–
A means of economically sending and receiving data over multiple network channels. Packet switching takes data and breaks it down
into packets-small bundles of information containing the payload and routing information. The packets are then transmitted to the
receiving end, where they are converted back to the original data
Glossary
•
Circuit Switching
–
•
Signaling System #7 (SS7)
–
•
A codec is a device or program capable of encoding and/or decoding a digital data stream or signal. Codecs are used to convert an
analog voice signal to digitally encoded version. Cedecs vary in sound quality, the bandwidth required, the computational
requirements etc.
ITU (International Telecommunication Union)
–
•
The basis for routing traffic with out-of-bound signaling. SS7 in itself is not a network service offering, but rather the underlying
infrastructure upon which many existing and proposed offerings are based.
Codec
–
•
In telecommunications, a circuit switching network is one that establishes a fixed bandwidth circuit (or channel) between nodes and
terminals before the users may communicate, as if the nodes were physically connected with an electrical circuit. The bit delay si
constant during the connection, as opposed to packet switching, where packet queues may cause varying delay
Established to standardize and regulate international radio and telecommunications. It was founded as the International Telegraph
Union in Paris on May 17, 1865. Its main tasks include standardization, allocation of radio spectrum, and organizing interconnection
arrangements between different countries to allow international phone calls
RFC (Request for Comments)
–
In computer network engineering, a request for comments is a memorandum published by the Internet Engineering Task Force (IETF)
describing methods, behaviors, research, or innovations applicable to the working of the Internet and Internet-connected systems.
Glossary
•
Cellular
–
•
GSM (Global System for Mobile Communications)
–
•
•
•
GPRS is a packet oriented mobile data service available to users of (GSM) mobile phones. It provides data rates from 56 up to 114
Kbits'.
SMS (Short Message Service)
–
SMS is a communications protocol allowing the interchange of short text messages between mobile telephone devices
–
The analog cellular mobile phone system in North and South America and more than 35 other countries. AMPS is the cellular
equivalent of POTS.
AMPS
Radio
–
•
GSM is the most popular standard for mobile phones in the world. Its promoter, the GSM association, estimates that 82% of the
global mobile market uses the standard
GPRS (General Packet Radio Service)
–
•
In Wireless communications, cellular refers most basically to the structure of the wireless transmission networks which are comprised
of cells or transmission sites.
A communications device allowing the wireless transmission through space of audible signals encoded in electromagnetic waves in
the approximate frequency range from 10 kilohertz to 300,000 megahertz.
Clearing House
–
an organization that exists to gather information from a variety of sources and distribute it to individuals and organisations according
to their different needs