Getting Started ................................................................
Other Applications ...........................................................
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Introduction to VoIP
Voice over IP: A VoIP (Voice over Internet Protocol) phone call is transmitted over a data
network, such as the internet. The “Voice Over Internet Protocol” is a catch all for the
protocols and technology of encoding a voice call that allows the voice call to be slotted in between data packets on a data network. Such data networks may be the public
internet, a corporate intranet, or a managed network used by traditional long distance
and international providers. VoIP phone calls, if properly engineered, sound just as good
as a circuit switched TDM phone call - the ones we make and receive every day. There
are three main benefits to VoIP phone calls:
First, they may potentially be cheaper. Since the data network is typically charged on a
flat rate and thus the marginal cost of making a VoIP is zero, how much cheaper
depends on: 1: The cost of terminating the VoIP call into the traditional phone network.
(Figure a penny a minute.) 2: The price of a standard circuit switched TDM call. They’ve
been getting cheaper over the years. 3: How much tax is levied on both. Taxes are horrendous on traditional circuit switched long distance calls. They aren’t so big, yet, on
VoIP calls, which are classified by some regulatory agencies as “information services,”
not voice phone calls. Therefore they escape most taxes.
Second, you may achieve the benefits of managing a voice and data network as one
network. If you have IP phones, moves, adds and changes, will be easier and cheaper.
IP phones are basically networked computers. They have individual addresses, with
memories, and user profiles. Their software upgrades are typically centrally managed
using standard computing systems. In short, they’re “user friendly” to manage and can
largely be managed remotely.
Third, and the key attraction of IP telephony - is added (and integrated) new services,
including integrated messaging, voice emails, number portability, caller ID with name,
call waiting, call forwarding, take your area code with you, plug into the internet anywhere and make free calls from anywhere in the world. And best of all, you can typically manage your phone via a website on the internet, which can provide complete call
accounting. A VoIP is typically a much better animal than today’s circuit switched phone.
* Note: Loud ring only- paging requires a RAD-1A.
(#) Note: # of ports.
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Glossary of Terms
ATA:
Analog Telephone Adapter. A device that acts as a bridge between an analog
telephone and a network, making VoIP possible. ATA’s have an RJ-11 jack for connection to the telephone or other analog device and an RJ-45 jack for connection to the network.
DHCP:
work server automatically assigns an IP Address to a Host. Additional details of the configuration, including Subnet Mask and Default Gateway are relayed to the host as well.
DNS Server:
electronics.com) into an IP address.
Dynamic Host Configuration Protocol. This is the set of rules by which a net-
A DNS (Domain Name System) server converts a domain name (viking-
Default Gateway: A device that routes network traffic between different Subnets or
networks. This is one of the pieces of information needed to manually set an IP Address.
Dynamic IP Address:
is assigned a Lease which can expire if the address is not used within the period of the
lease.
Ethernet:
typically uses coaxial cable or twisted pair wires to achieve transmission speeds up to
1Gb or more.
FXO:
age, and provides on hook/off hook indication. It could have an analog phone line
plugged into it, or a Viking product that is designed to be connected to a spare analog
trunk port.
FXS:
tery, dial tone, and ring voltage. Analog telephone equipment like phones and fax
machines can be plugged into an FXS port.
Ihe most commonly used LAN technology. An ethernet Local Area Network
An FXO port acts like an analog trunk port. It receives talk battery and ring volt-
An FXS port is like a station port on an analog phone system. It provides talk bat-
An address supplied by a DHCP Server. This type of address
Hardware Address:
Host:
A computer or device connected to a network.
Internet:
can be accessed by individual computers or networks.
IP:
puters communicate on networks and on the Internet.
IP Address:
a network.
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A worldwide system of computer networks running on the IP protocol which
Internet Protocol is the set of communications conventions that govern the way com-
This is the address that uniquely identifies a Host (computer or device) on
See MAC Address
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LAN: Local Area Network. A LAN is a network connecting computers and other devices
within an office or building.
Lease: The amount of time a DHCP Server reserves an address it has assigned. If the
address isn’t used by the Host for a period of time, the lease can expire and the address
can be assigned to another host.
MAC Address:
a Hardware Address or Physical Address, is a unique address assigned to a device at
the factory. It resides in the device’s memory and is often printed on the outside of the
device. It is used by Routers to send network traffic to the correct IP Address. Example:
00-0B-82-12-0C-48
Network Administrator:
network. The network administrator’s job includes making sure that space is available
on the file server, that the file server is backed up regularly, that new employees can
access the network, troubleshooting network problems, and other tasks.
Physical Address:
Router:
information to the right location, routers look at IP Addresses, MAC Addresses, and
Subnet Masks.
SIP:
VoIP calls but which can also be used for video or any media type. SIP establishes sessions using these technologies and deploys them over IP networks, enabling service
providers to integrate basic IP telephony services with internet, email and chat services.
SIP servers also support traditional telephony features like call forwarding.
A device that forwards data from one network to another. In order to send
Session Initiation Protocol. An IP telephony signaling protocol primarily used for
Static IP Address:
is manually removed. It is not subject to the lease limitations of a Dynamic IP Address
assigned by the DHCP Server.
MAC stands for Media Access Control. A MAC address, also called
The person responsible for setting up and maintaining a
See MAC Address
A static IP Address is assigned manually and is permanent until it
Subnet Mask:
tion. This is one of the pieces of information needed to manually set an IP Address. It
also signifies the number of IP addresses and the scope available.
VoIP Gateway:
at some point act as digital-to-analog converters. The essential function of a VoIP gateway is to convert an analog voice signal to digital information so it can be sent out on
a network, making VoIP possible. This conversion function is often built into other
devices like routers or cable/DSL modems. If the gateway’s only function is to convert
digital to analog and vice versa, it is called an ATA.
A type of address filter used by Routers to send data to the correct loca-
This is a generic term that covers a variety of devices, all of which
WAN: Wide Area Network. A WAN is a network comprising a large geographical
area like a state or country. The largest WAN is the Internet.
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Compatible Gateway Equipment
MODEL ATA-100
calling features and also enables internet calling. In addition, the ATA-100 has an RJ11 port for switching to the PSTN analog phone network via touch tone commands.
For more information, go to www.vikingelectronics.com and request DOD# 234.
Viking model ATA-100 allows the user to connect many Viking products to your LAN, WAN
or the internet. Designed for voice communication between an analog telephone device
and an IP PBX, voice paging or VoIP internet
calling. The ATA-100 can be used with or
without SIP registration. If unregistered, the
ATA-100 can perform basic tasks like sending
voice data across a network. SIP registration
(not included) opens up an impressive list of
VONAGE
Vonage provides a VoIP ATA that can connect Viking products (those that require an
FXS port) via your internet provider.
Residential plans begin at $14.99 a month
and business plans start at $39.99 a month.
DTMF Viking products that dial out, as well
as those that can be programmed remotely are also compatible.
For more information, go to www.vonage.com
AXIS (Video and Voice)
Axis manufactures video servers that encode
analog video and audio signal for transmission across an IP network or the internet. The
single-channel model 247S is shown.
Supplied software allows you to access Axis
units connected to the network (auto-discovery) and program them via a web page inter-
face. The video and audio can then be monitored from any location on the network.
For more information, go to www.axis.com
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Getting Started
CONNECTING TO A LAN, WAN OR IP PBX (VOICE ONLY)
Step 1:
install an ATA. Ask them to supply you with a static IP address. Example: Viking model
ATA-100 shown on page 6.
Contact your network administrator and inform them that you would like to
Step 2: Follow the directions included with the gateway (ATA) equipment.
CONNECTING TO THE INTERNET (VOICE ONLY)
Step 1:
must have a broadband internet connection). Example: Vonage shown on page 6.
Step 2:
Contact your local provider (such as Vonage) and order a calling plan (you
Follow the directions included with the gateway (ATA) equipment.
CONNECTING TO A NETWORK (VIDEO AND VOICE)
Step 1:
install a video camera on the network. Ask them to supply you with a static IP address.
Example: Axis video server shown on page 6.
Step 2:
Contact your network administrator and inform them that you would like to
Follow the directions included with the video server equipment.
Note: If the video server receives its power from PoE (Power over Ethernet) and your network does not support PoE, it will be necessary to purchase a PoE power injector to
power the server.
Step 3:
can be monitored from anywhere on the local area network (LAN). To access the video
from the internet, network routers must be configured to allow incoming traffic, which is
usually done on a specific port. Please refer to the documentation for your router for further instructions (this will likely require the assistance of your network administrator).
Connecting to the internet (optional). Once the video server is connected, it
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Other Applications
VoIP PAGING
NETWORK or
INTERNET
Model RAD-1A
Model
ATA-100
In this example the ATA-100 converts network packets back to an analog paging signal
which is amplified by the PA-30 Paging Amplifier. Note that if the paging system is analog, it is necessary to encode the audio paging signal using another ATA-100 before
sending it out over the network.
Model PA-30
Paging
Horn
VoIP HANDSFREE TALKBACK PAGING
NETWORK or
INTERNET
Model RAD-1AModel HF-3W
Paging
Horn
Model
ATA-100
Since the HF-3W is a talkback paging amplifier, the ATA-100 in this case both converts
network data to analog paging signal and encodes the talkback signal to data packets
that can be sent over the network. If the paging system is analog, another ATA-100 is
needed to perform encoding/decoding functions at the originating end.