Omni pcx-enterprise_overview

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Alcatel OmniPCX Enterprise

SECTION

OmniPCX Enterprise overview

Ed.01

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Section - OmniPCX Enterprise overview


SUMMARY

General overviewGeneral information ......................................................................................... . 3

1. Overview.................................................................................................. . 32. Operating principle ................................................................................. . 43. Example of implementation..................................................................... . 54. Hardware overview ................................................................................. . 65. Software overview ................................................................................... .10

Ed.01 Ref.3EU199919ENAA .1

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.2 Ref.3EU199919ENAA Ed.01

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Section - OmniPCX Enterprise overview General overviewGeneral information

50A01101000A000AAEN

General overviewGeneral informationEdition: 01

1. Overview

The OmniPCX Enterprise R5.0 Lx (Linux version) is a private telephone switch based on an IP datanetwork infrastructure.

For clarity and concision, in the rest of this document, the term OmniPCX Enterprise is used for theLinux version of the PCX, and the term OmniPCX 4400 refers to the Unix version.

Warning: This publication concerns the OmniPCX Enterprise R5.0 Lx only.

The main elements of the OmniPCX Enterprise are:

- a �Call Server�, that is the system control center,

- one or more (possibly none) Media Gateways supporting standard telephone equipment:

� wired UA or analog sets,

� lines to the standard public or private telephone networks,

� DECT or PWT mobile phone base stations,

� voice guides,

� compressors to ensure the link between standard and IP phones.

- wired telephone sets (UA, analog),

- IP telephone sets (IP-Phone or multi-media PC),

- DECT or PWT mobile sets.


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General overview Section - OmniPCX Enterprise overviewGeneral information

Figure 1 : OmniPCX Enterprise telephone system

Call Server Wired UAsets

IBS basestations

(DECT orPWT) andmobiles

Analog setsand fax

machines

IP-Phones

IP network *

Standard phonenetwork

V24 / IPadapt.

Asynchronous VT100terminal ACT

Media GatewayRouterTo other IP

networks

OmniPCXMedia Gateway


IPIP-FAX

Voice mail &Automated attendant

(*) : local client network or OmniPCX Enterprise specific network.

Other characteristics:

- an OmniPCX Enterprise may belong to an ABC-F network - in such a network OmniPCXEnterprises and OmniPCX 4400s can be connected.

- anOmniPCX Enterprise can use direct RTP to optimize IP resources.

- an OmniPCX Enterprise can connect to the following public networks:

� digital: ISDN T0/T1/T2,

� digital: T1 CAS,

� analog BCA,

� analog: Loop start,

� analog: Ground start.

2. Operating principle

Call Server is a software program that runs with LINUX. It has the configuration of each system ele-ment. It also stores the current status of each element in memory (set, trunk, trunk group, etc.). Forexample (simplified) a set may be at idle, ringing or calling. When an event occurs (set unhooked for


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example), this event is sent to the Call Server by the Media Gateway. The Call Server, according to setconfiguration and status, decides on the operations to be performed. In the case of an idle set beingoffhooked, it can decide to send the dialing prompt tone. The order is transmitted to the Media Ga-teway via the IP network. The Media Gateway interprets the order from the Call Server and connectsthe required tone to the designated set.

This scenario is identical for all elements.

Protocols used:

- voice calls transit on IP segments using one of the following protocols: G711, G723 or G729,

- Data calls transit on IP segments by encapsulation in IP datagrams,

- FAX calls transit on IP segments either using proprietary protocol (for Alcatel equipment) or usingT38 protocol (for non Alcatel equipment).

3. Example of implementation

The term �IP network� may cover one or more local area networks (LANs) or local networks linked viapublic networks to make Wide Area Networks (WANs).


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Figure 2 : Example of multi-site node implementation

Call Server

Main site

Local network

Router

Media Gateway

Local network

Router

Media Gateway

Public WAN network

Main site

Local networkRouter

Media Gateway

Secondary site

4. Hardware overview

4.1. Call ServerCall Server is a program that can run on the following supports:

- PC (Appliance server). This machine must be powerful enough to support the software and mustbe able to connect to the IP network. This machine is configured and delivered by Alcatel.

- CS board, this board is installed in an OmniPCX Media Gateway. However, the CS board onlyuses the power supply of this rack; all calls are made via the IP link.

Whatever the supporting hardware, the service provided by the Call Server remains identical.


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4.2. OmniPCX Media Gateway

The OmniPCX Media Gateway hardware comprises an S, M or L rack, common to both the OmniPCXEnterprise and OmniPCX Office. These racks respectively contain 3, 6 or 9 board slots. If 9 slotsare not sufficient, two extension racks (maximum) can be connected for increased capacity.

The OmniPCX Media Gateway has:

- A 220V (or 110V) AC / 48V DC power supply,

- Batteries ensuring limited autonomy (several minutes). Their purpose is to ensure that the systemcan shut down correctly. For increased autonomy, a UPS and external batteries are required.

- A GD board ensuring:

� the IP link with the Call Server,

� support of the compressors/decompressors enabling voice calls with the other Media Gateways,the IP-Phones and standard telephone resources (not IP),

� support of the voice guides, tones and 3-party conference circuits,

� the link with the rack interface boards,

� the link with the extension racks.

- Interface boards that are used to connect:

� digital or analog sets,

� DECT/IBS (or PWT) mobile phone base stations,

� links with the public or private networks,

- Possibly one or two extension racks, connected to the main rack via an extension board.

Some interface boards are common to the OmniPCX Enterprise and OmniPCX Office. Othersare specific to the OmniPCX Enterprise.


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Figure 3 : OmniPCX Media Gateway with extensions

Call Server IP network

Extension rack 1

1

2


Main rack

Extension rack 2

3

IP link

HSL link

UA link HSL link

In the above figure, the rack (1) is directly connected to the IP network. Racks (2) and (3) are extensionracks; they are connected by HSLs (High Speed Links).

4.3. ACT Media Gateway

ACT Media Gateway hardware comprises a OmniPCX 4400 cabinet (VH rack or M2 or MI cabinet).The purpose of the ACT Media Gateway is to support OmniPCX 4400 equipment not supported bythe OmniPCX Enterprise.

It comprises:

- one or more public or private network interface boards (for example LDTL, ATL8 ...),

- one or more auxiliary boards (for example GPA),

- one or more DECT/RBS connection boards.

The ACT Media Gateway boards used for the OmniPCX Enterprise are common to the OmniPCXEnterprise and OmniPCX 4400.


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Figure 4 : ACT Media Gateway

Call Server

ACTMedia Gateway

IP network INT-IPboard Interface

board Public network

DECT/RBSboard

The Call Server only supports one ACT Media Gateway.

Power supply:

ACT Media Gateways operate on 48V DC. Depending on model, these cabinets use an external powersupply or are directly connected to the mains (internal power supply). Internal or external batteriesensure operation if there is a mains power cut.

4.4. System with no Media Gateway

There areOmniPCX Enterprise systems with no Media Gateway. In this case, the PCX only compriseselements connected directly to the IP network. That is to say:

- a Call Server,

- IP-Phone sets,

- one (or more) IP routers to reach remote networks (public or private),

- possibly, asynchronous V24 terminals connected via V24/IP adaptors.


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Figure 5 : OmniPCX Enterprise �Full IP� configurations

Call Server IP-PhonesIP network

V24 / IPadapt.

Asynchronous terminals

RouterTo other IPnetworks

V24 / IPadapt.

4.5. SafetyThe Call Server may be duplicated to overcome all malfunctions.Furthermore, the public switched network can be used to backup IP links between the Call Server andOmniPCX Media Gateways.

4.6. Voice mail and automated attendantThe 4645 application e-VA (enterprise Voice Application) is a voice mail which also encompasses au-tomated attendant and ubiquity functions. This application can be installed on the same processor asthe Call Server, or work from a dedicated machine.

5. Software overview

5.1. Call ServerThe Call Server software is loaded on the hard drive at system installation. This software is unique forall configurations. Licenses and locks allow certain features to be allowed or barred according to theoptions purchased. The main functions handled by the Call Server are:

- call handling, telephone call processing,

- internal applications, accounting, hotel-hospital, call center ...

- DHCP server, download server, gatekeeper.

5.2. Media GatewayThe Media Gateway software is downloaded from the Call Server at initial installation. This softwareis stored in flash memories. At subsequent startups, there is no download unless upgrade is required.


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The IP address of the Media Gateway can be manually or automatically assigned using a DHCP server.The Call Server may be used as DHCP server.

5.3. IP-Phones

The IP equipment software is downloaded from the Call Server at initial installation. This software isstored in flash memories. At subsequent startups, there is no download unless upgrade is required.

The IP address of an IP-Phone can be manually or automatically assigned using a DHCP server. TheCall Server may be used as DHCP server.


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