Allied Telesis AT-VP504E FXS User manual

AT-VP504E FXS (H.323)
User’s Manual
PN 613-50143-00 Rev A
VoIPTalk

Copyright © 2001 Allied Telesyn International, Corp.
960 Stewart Drive S ite B, S nnyvale CA USA 94085
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Contents User’s Manual (H.323 Version)
AT-VP504E FXS iii
Contents
Chapter 1
Making Calls with the AT-VP504E FXS.........................................1
Before you Begin...............................................................................................2
Acronyms...................................................................................................................3
Overview of the AT-VP504E FXS ............................................................................3
Using the AT-VP504E FXS.......................................................................................3
Why use the AT-VP504E FXS? ................................................................................4
How does it Work? ....................................................................................................4
AT-VP504E FXS Call Processes ......................................................................5
Calls Involving Another Terminal.............................................................................6
Calls Involving a Terminal and an H.323 Endpoint ..................................................6
Calls Involving a PSTN Gateway..............................................................................8
Calls Without a Gatekeeper (Direct Calls) ................................................................9
Making Calls....................................................................................................10
Examples .........................................................................................................11
Example 1 ................................................................................................................11
Example 2 ................................................................................................................12
Appendix A
Glossary.........................................................................................15

Contents User’s Manual (H.323 Version)
AT-VP504E FXS iv

AT-VP504E FXS 1
Chapter 1
Making Calls with the
AT-VP504E FXS
Thank you for purchasing the AT-VP504E FXS from Allied Telesyn.
This manual illustrates some of the various call processes the AT-VP504E
FXS supports. It also describes how to make and receive calls, as well as
the services the AT-VP504E FXS offers.
This chapter covers the following topics:
Before you Begin 2
AT-VP504E FXS Call Processes 5
Making Calls 10
Examples 11

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 2
Before you Begin
This manual describes how to use the AT-VP504E FXS to make and
receive calls. It assumes that your AT-VP504E FXS has been properly set
up by your system administrator. If you need to install and configure the
AT-VP504E FXS yourself, please refer to the Administration Manual
provided with your AT-VP504E FXS or contact your system
administrator.
Related Documentation
In addition to this Manual, each document set of the AT-VP504E FXS
includes the following:
 Administration Manual
This manual explains how to install and set up the various
AT-VP504E FXS parameters. It is intended for a network
administrator. The manual is not printed – it is located on the
Installation CD provided with your AT-VP504E FXS.
 AT-VP504E FXS Quick Start booklet
This printed booklet allows you to quickly setup and work with
your AT-VP504E FXS.

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 3
Acronyms
Overview of the AT-VP504E FXS
The AT-VP504E FXS is an IP Telephony adaptor that connects up to four
(4) analog terminals to a LAN with access to an IP Network, allowing
high-quality, full duplex, audio/fax communication.
This version of the AT-VP504E FXS uses the H.323 protocol, which is a
standard for audio/video conferencing over networks.
Using the AT-VP504E FXS
Once your networkadministrator has properly set up the AT-VP504E FXS
configuration settings, you can dial any number on your phones or faxes
(which are connected to the AT-VP504E FXS) and place the call. Should
you encounter any calling problems, please discuss it with your
administrator to remedy the problem.
FXS Foreign Exchange Service
IP Internet Protocol
LAN Local Area Network
LED Light Emitting Diode
Mb/s Megabits per Second
PBX Private Branch Exchange
PSTN Public-Switched Telephone Network
TCP/IP Transmission Control Protocol/Internet Protocol
TFTP Trivial File Transfer Protocol
VoIP Voice Over Internet Protocol

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 4
Why use the AT-VP504E FXS?
 The AT-VP504E FXS terminals drastically reduce
telecommunications costs, since calls are re-routed through
data networks instead of standard telephone networks.
 Overhead is minimal, because the AT-VP504E FXS
terminals fully utilize your existing telecommunications
equipment and computer networks.
How does it Work?
When an Internettelephony call isplaced from one location to another, the
voice signals pass through the AT-VP504E FXS connected to the handset
in the caller’s area. The voice signals are compressed into data packets,
which are then diverted by the AT-VP504E FXS onto an IP/data network
such as the Internet, or another type of data network. When the voice data
reaches the general area of its destination, it is converted back into voice
signals, then fed into then fed into the corresponding telephone or fax
machine.
The AT-VP504E FXS system utilizes technology that optimizes available
bandwidth, so usersdonothear echoes,stopsand starts, orannoying clicks
and pops. When traffic congestion is properly managed, AT-VP504E FXS
customers cannot tell that their conversation is being carried over a packet
network rather than the traditional Public Switched Telephone Network
(PSTN).

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 5
AT-VP504E FXS Call Processes
Thefollowingexamplesillustratesomeofthevariouscalling processesthe
AT-VP504E FXS supports. These processes can be adapted at will to suit
your needs and requirements.
The AT-VP504E FXS can communicate with the following devices:
 Another terminal on the IP network such as the AT-VP504E
FXS.
 Any LAN H.323 endpoint on the IP network such as:
• a Soft Phone
• an IP phone directly connected to the IP network
 A PSTN phone or fax. However, the AT-VP504E FXS
would need to contact a PSTN gateway such as the AT-
VP504E FXO.
Note: When calling a phone or a fax on another remote H.323
terminal, you can do so when registered to a Gatekeeper or not.

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 6
Calls Involving Another Terminal
The following example illustrates how to reach a phone or fax on another
AT-VP504E FXS terminal.
 Phone/Fax -> AT-VP504E FXS A -> AT-VP504E FXS B -> Phone/Fax
A user makes a call with the phone/fax connected to an AT-VP504E FXS,
which in turn contacts another AT-VP504E FXS, then reaches the
corresponding phone/fax.
Calls Involving a Terminal and an H.323 Endpoint
The following examples illustrate how a phone/fax connected to an
AT-VP504E FXS terminal can communicate with a LAN H.323 endpoint
on the IP network. Such endpoints could be:
 a Soft Phone
 an IP phone directly connected to the IP network
IP / LAN
Telephone Telephone
AT-VP504E FXS AT-VP504E FXS
Fax Fax
Gatekeeper
 IP phone
 Soft Phone
H.323 Endpoint

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AT-VP504E FXS 7
 Phone/Fax -> AT-VP504E FXS -> LAN H.323 endpoint
A user makes a call with the phone/fax connected to an AT-VP504E FXS,
which reaches the corresponding LAN H.323 endpoint on the IP network.
 LAN H.323 endpoint -> AT-VP504E FXS -> Phone/Fax
A LAN H.323 endpoint contacts the AT-VP504E FXS, which reaches the
corresponding phone/fax connected to the AT-VP504E FXS terminal.
IP / LAN
Telephone Telephone
AT-VP504E FXS AT-VP504E FXS
Fax Fax
Gatekeeper
 IP phone
 Soft Phone
H.323 Endpoint
IP / LAN
Telephone Telephone
AT-VP504E FXS AT-VP504E FXS
Fax Fax
Gatekeeper
 IP phone
 Soft Phone
H.323 Endpoint

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 8
Calls Involving a PSTN Gateway
The following example illustrates how a telephone/fax connected to an
AT-VP504E FXS terminal and a PSTN phone can communicate via a
PSTN gateway.
 Phone/Fax -> AT-VP504E FXS -> AT-VP504E FXO (Gateway) ->
PSTN
A user makes a call with the phone/fax connected to an AT-VP504E FXS,
which in turn contacts an AT-VP504E FXO gateway, then reaches the
corresponding PSTN Phone.
A PSTN user can also contact the AT-VP504E FXO gateway, which in
turn contacts the AT-VP504E FXS, then reaches the corresponding phone/
fax.
IP / LAN
Telephone
AT-VP504E FXS
Fax
Gatekeeper
PSTN Phone
PSTN
4 telephone lines
connected to the PSTN
AT-VP504E FXO
(Gateway)

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 9
Calls Without a Gatekeeper (Direct Calls)
If a FXS port of the AT-VP504E FXS is not configured to register with a
gatekeeper, you can reach this FXS port by dialing the IP address of the
AT-VP504E FXS and the E.164 alias of this FXS port.
 To make a direct call without a gatekeeper:
1. Dial “**” (IP address prefix).
2. Dial the numerical digits of the IP address and use the“*” for the
“.” of the IP address.
3. Dial“#”,then thetelephonenumber(E#,164alias)ofthespecific
port you want to reach.
4. Dial “*” to terminate the IP address.
For example, let’ssay you want to reach the telephone connected
to Port 3 of the AT-VP504E FXS with the IP address
192.168.0.23. The phone number assigned to Port 3 of this
AT-VP504E FXS is 1234. You must then dial the following
digits:
**192*168*0*23#1234*
 IP Address Call
Note: This type of dialing can only be possible if the called FXS port
is not configured to register with a gatekeeper.
IP / LAN
Telephone Telephone
AT-VP504E FXS AT-VP504E FXS
Fax Fax
 IP phone
 Soft Phone
H.323 Endpoint

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 10
Making Calls
When making calls, the digits (DTMF) you dial are checked against a
dialing rule. A dialing rule is a logic used to parse the digits received from
a line (FXS port). It helps to determine if an E.164 alias or an IP address is
being dialed or if an IP address is complete.
Dialing rules can be set for the following items:
When you dial a sequence that is not recognized as an E.164 alias or as the
IP address prefix, an error tone is played. If you dial an invalid IP address,
for example “192.168.2488”, an error tone is played as well.
The way you must dial digits is directly influenced by how your network
administrator has set up thedialing rules. Allied Telesyn strongly suggests
that you check with your network administratorbefore attempting to make
calls and verify the dialing rules he/she has implemented.
Table 1: Dialing Rules
Dialing Rule Priority Description
Automatic speed dial A call is automatically routed on the IP
network.
One digit speed dial When dialing a particular digit, a new call is
automatically started and routed on the IP
network.
IP address prefix In order to dial an IP address, a prefix must be
dialed first. The default prefix is [**].
IP address dots The dots of an IP address are dialed using “*”.
End of dialing character You dial a particular digit to indicate that an
E.164 alias is complete.
Assume end of dialing
after ndigits An E.164 alias is considered complete after n digits are dialed.
Assume end of dialing
after nseconds nseconds after the last digit was dialed, an E.164 alias is considered complete.

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 11
Examples
Example 1
For this example, the following configuration is used:
 Speed dialing disabled.
 IP address prefix: **.
 End of dialing character: *.
 Assume end of dialing after 7digits.
 Assume end of dialing after 5seconds.
With this configuration, if the first digit to be dialed is “*”, the “*” is not
recognized as the end of dialing character but as the first “*”of the IP
address prefix. The “IP address prefix” rule has a higher priority than the
“End of dialing character” rule.
 Case 1: You want to dial 829-8749.
1. You dial “8298749”. When the last “9” is dialed, the E.164 alias
is considered complete because 7 is the maximum number of
digits for an E.164 alias.
Complete sequence: 8298749
 Case 2: You want to dial #245.
1. You dial “#245”.
2. You dial “*” (the end of dialing character). When “*” is dialed,
the E.164 alias is considered complete.
Complete sequence: #245*
 Case 3: You want to dial #245, but you do not know what is the end
of dialing character.
1. You dial “#245”.
2. You wait 5 seconds. 5 seconds after the last digit was dialed, the
E.164 alias is considered complete.
Complete sequence: #245

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 12
 Case 4: You want to dial 204.236.247.67.
1. You dial “**” (IP address prefix).
2. You dial “204*236*247*67*”.
Complete sequence: **204*236*247*67*
 Case 5: You want to dial 204.236.247.67,but you do not know that
an IP address is terminated with a “*”.
1. You dial “**” (IP address prefix).
2. You dial “204*236*247*67”.
3. You wait 5 seconds. 5 seconds after the last digit was dialed, the
IP address is considered complete.
Complete sequence: **204*236*247*67
 Case 6: You want to dial 204.236.247.67.
1. You dial “1**”. The IP address prefix is not recognized because
another digit was dialed before. Actually, this sequence is
recognized as an E.164 alias equal to “1”. The second “*” is
ignored.
Example 2
For this example, the following configuration is used:
 Speed dialing enabled with “*”. Speed dial alias is 1230.
 IP address prefix: #.
 End of dialing character: none.
 Assume end of dialing after 4digits.
 Assume end of dialing after 5seconds.
 Case 1: You want to dial 2340.
1. You dial “2340”. When the last “0” is dialed, the E.164 alias is
considered complete because 4 is the maximum number of digits
for an E.164 alias.
Complete sequence: 2340

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 13
 Case 2: You want to dial 240.
1. You dial “240”.
2. Because theEnd ofdialing character rule is set to none, you must
wait 5 seconds before the E.164 alias is considered complete.
Complete sequence: 240
 Case 3: You want to dial 1230.
1. You dial “*” (one digit speed dial).
2. The speed dial is activated. A new call is started with “1230”.
Complete sequence: *
 Case 4: You want to dial 204.236.247.67.
1. You dial “#” (IP address prefix).
2. You dial “204*236*247*67*”.
Complete sequence: #204*236*247*67*

Chapter 1 - Making Calls with the AT-VP504E FXS User’s Manual (H.323 Version)
AT-VP504E FXS 14

AT-VP504E FXS 15
Appendix A
Glossary
A
Area Code
The preliminary digits that a user must dial to be connected to a
particular outgoing trunk group or line. In North America, an Area
Code has three (3) digits and is used with a NXX (office code)
number. For example, in the North American telephone number 561-
955-1212, the numbers are defined as follows:
Outside North America, the Area Code may have any number of
digits, depending on the national telecommunication regulation of the
country. In France, forinstance, the numbering terminology isdefined
as xZABPQ 12 34,where:
Table 2: North American Numbering Plan
No. Description
561 Area Code, corresponding to a geographical zone in a non-LNP
(Local Number Portability) network.
955 NXX (office code), which corresponds to a specific area such as
a city region.
1212 Unique number to reach a specific destination.
Table 3: France Numbering Plan
No. Description
x Operator forwarding the call. This prefix can be made of 4
digits.
Z (regional) geographical zone of the number (in France, there are
5 zones). It has two (2) digits.
ABP
QFirst 4 digits corresponding to a local zone defined by central offices.
12 34 Unique number to reach a specific destination.

Appendix A - Glossary Administration Manual (H.323 Version)
AT-VP504E FXS 16
In this context, the Area Code corresponds to the Zportion of the
numbering plan. Since virtually every country has a different dialing
plan nomenclature, it is recommended to identify the equivalent of an
Area Code for the location of your device.
C
Country Code (CC)
1. In international direct telephone dialing, a code that consists
of1-,2-,or 3-digitnumbers in which the firstdigitdesignates
the region and succeeding digits, if any, designate the
country.
2. In international record carrier transmissions, a code
consisting of 2- or 3-letter abbreviations of the country
names, or 2- or 3-digit numbers that represent the country
names, that follow the geographical place names.
D
Dual-Tone Multi-Frequency ((DTMF)
In telephone systems, multi-frequency signaling in which a standard
set combinations of two specific voice band frequencies, one from a
group of four low frequencies and the other from a group of four
higher frequencies, are used. Although some military telephones have
16 keys, telephones using DTMF usually have 12 keys. Each key
correspondsto adifferent pair offrequencies. Eachpair of frequencies
corresponds to one of the ten decimal digits, or to the symbol “#” or
“*”, the “*” being reserved for special purposes.
Dynamic Host Configuration Protocol (DHCP)
TCP/IP protocol that enables PCs and workstations to get temporary
or permanentIP addresses (out of a pool) from centrally-administered
servers.