Allied Telesis AT-VP504E FXS User Manual

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AT-VP504E FXS (H.323) VoIPTalk

User’s Manual

PN 613-50 143-00 Rev A

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Ethernet is a registered trademark of Xerox Corporation. All other product names, company names, logos or other designations mentioned herein are trademarks or registered trademarks of their respective owners.

Allied Telesyn International, Corp. reserves the right to make changes in specifications and other information contained in this document without prior written notice. The information provided herein is subject to change without notice. In no event shall Allied Telesyn International, Corp. be liable for any incidental, special, indirect, or consequential damages whatsoever, including but not limited to lost of profit, arising out of or related to this manual or the information contained herein, even if Allied Telesyn International, Corp. has been advised of, known, or should have known, the possibility of such damages.

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Contents User’s Manual (H.323 Version)

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 t he 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

AT-VP504E FXS iii

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Contents User’s Manual (H.323 Version)

AT-VP504E FXS iv

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Chapter 1

Making Calls with the

AT-VP504E FXS

Thank you for purchasing the AT-VP504E FXS from Allied Telesyn. Thismanual illustrates some of the variouscallprocesses 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-VP504EFXS Call Processes 5 Making Calls 10 Examples 11

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

Before yo u Begi n

This manual describes how to use the AT-VP504E FXS to m ake and receive calls. I t 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 FX S or contact your system administrator.

Acronyms

FXS Foreign Exchange Service IP InternetProtocol 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

Overview of the AT-VP504E FXS

The AT-VP504E FXS is an IP Telephonyadaptor thatconnects up to four (4) analog terminals to a LAN with access to an IP Network, allowing high-quality, full duplex, audio/fax c ommunication.

This version of the AT-VP504E FXS uses the H.323 protocol, which is a standard f or audio/video conferencing over networks.

Using the AT-VP504E FXS

Onceyour networkadministratorhasproperlyset 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 c alling problems, please discuss it with your administrator to remedy the problem.

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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 Internet telephony callis placed from onelocation 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 a s 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 f ax machine.

The AT-VP504E FXS system utilizes technology that optimizes available bandwidth,sousersdo not hear echoes, stops and starts,orannoyingclicks and pops. When trafficcongestionisproperly 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).

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AT-VP504E FXS Call Processes

Thefollowingexamplesillustrate some of the various calling processesthe AT-VP504E FXS supports.These processes can be adapted at will to suit your needs and requirements.

Note: When calling a phone or a fax on another remote H.323

terminal, you can do so when r egistered to a Gatekeeper or not.

The AT-VP504E FXS can communicate with the following devices:



Another terminal on the IP network such as the AT-VP504E FXS.

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Any LAN H.323 endpoint on the IP network such as:

• a Soft Phone

• an IP phone directly connected to the IP network

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A PSTN phone or fax. However, the AT-VP504E FXS would need to contact a PSTN gateway such as the ATVP504E FXO.

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Calls Involving Another Terminal

The following example illustrates how to reach a phone or f ax on another AT-VP504E FXS terminal.



Phone/Fax -> AT-VP504E FXS A -> AT-VP 504E 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.



IP phone



H.323 Endpoint

Fax Fax

IP / LAN

Telephone Telephone

AT-VP504E FXS AT-VP504E FXS

Gatekeeper

Soft Phone

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. S uch endpoints could be:



a Soft Phone



an IP phone directly connected to the IP network

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Phone/Fax -> AT-VP 504E 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.

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IP phone

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H.323 Endpoint

Fax Fax

Soft Phone

IP / LAN

Telephone Telephone

AT-VP504E FXS AT-VP504E FXS

Gatekeeper

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LAN H.323 end po int -> AT-VP 504E 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.

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IP phone

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H.323 Endpoint

Fax Fax

Soft Phone

IP / LAN

Telephone Telephone

AT-VP504E FXS AT-VP504E FXS

Gatekeeper

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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.

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Phone/Fax -> A T-V P504E 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 F XO ga teway, which in turn contacts the AT-VP504E FXS, then reaches the correspondingphone/ fax.

PSTN

4 telephone lines

Fax

IP / LAN

Telephone

AT-VP504E FXS

connected to the PSTN

AT-VP504E FXO

(Gateway)

PSTN Phone

Gatekeeper

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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 FX S port.



To make a direct call without a gatekeeper:

1. Dial “**” (IP address prefix).

2. Dial the numericaldigits of the IP address and use the“*” for the

“.” of the IP address.

3. Dial“#”,thenthe telephonenumber(E#,164 alias)ofthe specific

port you want to reach.

4. Dial “*” to terminate the I P address.

For example, let’s say youwant to reach thetelephoneconnected 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



IP phone



H.323 Endpoint

Soft Phone

Fax Fax

IP / LAN

Telephone Telephone

AT-VP504E FXS AT-VP504E FXS

Note: This type of dialing can only be possible if the called FXS port

is not configured to register with a gatekeeper.

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Making Calls

When making calls, the digits (DTMF) you dial are checked against a dialingrule. A dialing rule is a logic used to parse thedigits 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:

Table 1: Dialing Rules

Dialing Rule Priority Description

Automatic speed dial A c all 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 o rder 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 n digits Assume end of dialing

after n seconds

An E.164 alias is considered complete after n

digits are dialed.

n seconds after the last digit was dialed, an

E.164 alias is considered complete.

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 a n 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 administratorhasset up the dialing rules. AlliedTelesynstrongly suggests thatyou check withyour network administrator before attemptingto make calls and verify the dialing rules he/she has implemented.

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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 7 digits.



Assume end of dialing after 5 seconds.

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 c haracter” rule.



Case 1: You want to dial 829-8749.

1. You dial “8298749”. When the last “9” isdialed, the E.164 alias

is considered complete because 7 is the maximum number of digits for an E.164 a lias.

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 youdo notknow 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

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

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*

Case5: You wantto dial 204.236.247.67, but youdo not knowthat 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 wa s dialed before. Actually, this sequence is recognized as an E.164 a lias 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 4 digits.



Assume end of dialing after 5 seconds.



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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

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

Case 2: You want to dial 240.

1. You dial “240”.

2. BecausetheEnd of dialing character rule is settonone,youmust

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 ne w 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*

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Appendix A

Glossary

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 Nor th American telephone number 561- 955-1212, the numbers are de fined as follows:

Table 2: North American Numbering Plan

No. Description

561 Area Code, correspondingto a geographicalzone in a non-LNP

(Local Number Portability) network.

955 NXX (office code), which corresponds to a specificareasuch as

a city region.

1212 Unique number to reach a specific destination.

Outside North America, the Area Code may have any number of digits, depending on the national telecommunicationregulationof the country.InFrance,forinstance,thenumberingterminologyis de fined as xZABPQ 12 34,where:

Table 3: France Numbering Plan

No. Description

x Operator forwarding the call. This prefix can be made of 4

digits.

Z (regional)geographicalzoneof the number (in France,there are

5 zones). It has two (2) digits.

ABPQFirst 4 digits corresponding to a local zone defined by central

offices.

12 34 Unique number to reach a specific destination.

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In this context, the Area Code corresponds to the Z portion 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.

Country Code (CC)

1. In international direct telephone dialing,a code that consists

of1-,2-,or 3-digit numbersin 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 num bers that represent the country names, that follow the geographical place names.

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 higherfrequencies,are used. Although somemilitarytelephoneshave 16 keys, telephones using DTMF usually have 12 keys. Each key correspondstoadifferentpairoffrequencies.Eachpa ir offrequencies 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 permanent IP addresses(outof a pool) from centrally-administered servers.

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Gatekeeper

A gatekeeperidentifies, controls, counts, and supervises the traffic or flow through the network. It also provides functions such as terminal and ga teway registration,address resolution, band-widthcontrol, and admission control.

Gateway

A device that links two different types of networks that use different protocols (for example, between the packet network and the Public Switched Telephone Network).

H.323

An umbrella standard f or audio/video conferencing over unreliable networks; architecture and procedures are covered by this standard; H.323 relies on H.225 and H.245.

Internet Protocol (IP)

The IP protocol is a standard describing software that keeps track of theInternet’saddressesfor different nodes, routes outgoing messages, and recognises incoming messages.

Light Emitting Diode ( LED)

A semiconductor diode that emits light when a current is passed through it.

Local Area Network (LAN)

Data-only communications ne twork confined to a limited geographic area, with moderate to high data rates. Contrast with WAN.

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Network

A group of two or more computer systems that are linked.

Off-hook

A line conditioncausedwhen a te lephone ha ndset isremoved from its cradle.

7On-hook

A line condition caused when a telephone handset is resting in its cradle.

Packet

Group of bits transmittedas a completepackage on apacket-switched network.

Port

Network access point, the identifier used to distinguish among multiple simultaneous connections to a host.

Private Branch Exchange (PBX)

A small to medium sized telephone system and switch that provides communications between onsite telephones and exterior communications networks.

Protocol

Defines a common set of rules and signals that computers on the network use to communicate.

Public Switched Telephone Network (PSTN)

The local telephone company network that carries voice data over analog telephone lines.

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Server

A computer or device on a network that works in conjunction with a client to perform some ope ration, for example a Windows NT Server.

T.38

AnITU-T Recommendationfor Real-timefax over IP. T.38 a ddresses IP fax transmissions for IP-enabled fax devices and fax gateways, definingthe translation of T.30 faxsignals a nd Internet Fax Protocols (IFP) packets.

Telephony

The science of translating sound into electrical signals, transmitting them, and then converting them back into sound.

Terminal

Device capable of sending or receiving data over a data communications c hannel.

Transmission Control Protocol/Internet Protocol (TCP/IP)

A suite ofcommunicationsprotocols developed by the Department of Defense in the 1970s that connects hosts on the Internet and provides the standards for transmitting data over networks.

Trivial File Transfer Protocol (TFTP)

Allows for transferring files (such as software upgrades) from a remote device.

V oice Over IP (V oIP)

The technology used to transmit voice conversations over a data network using the Internet Protocol. Such data network may be the Internet or a corporate Intranet.

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Wide Area Network (WAN)

A computer network where the computers are not geographically close and are linked by telephone lines or radio waves.

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Index User’s Manual (H.323 Version)

Index

acronyms 3

before you begin 2

call

dialing rule 10 examples 11 IP address 9 type of 5

DHCP 16 dialing

IP address call 9 documentation, related 2 DTMF 16

examplesof calls 11

Gatekeeper 17 Gateway 17

IP address, dialing 9

making

IP address call 9

Off-hook 18 On-hook 18

Packet 18 Port 18 PSTN 18

relateddocumentation 2

T.38 19 TCP/IP 19 TFTP 19

VoIP 19

H.323 17

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Index User’s Manual (H.323 Version)

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Allied Telesis AT-VP504E FXS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Before yo u Begi n

Acronyms

How does it Work?

Calls Involving Another Terminal

Calls Involving a Terminal and an H.323 Endpoint

Calls Involving a PSTN Gateway

Calls Without a Gatekeeper (Direct Calls)

Making Calls

Examples

Example 1

Example 2

Glossary