Omni pcx-enterprise_overview
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The document provides an overview of the OmniPCX Enterprise telephone system, which includes: 1. A Call Server that acts as the control center and connects to various hardware components over an IP network. 2. Media Gateways that connect standard telephone equipment like analog phones and support wireless devices. 3. IP phones and multimedia PCs that connect directly to the IP network.
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Omni pcx-enterprise_overview
- 1. A L C ET L Alcatel OmniPCX Enterprise SECTION OmniPCX Enterprise overview Ed.01
- 3. A L C ET L Alcatel OmniPCX Enterprise Section - OmniPCX Enterprise overview Section - OmniPCX Enterprise overview SUMMARY General overview General information ......................................................................................... . 3 1. Overview.................................................................................................. . 3 2. Operating principle ................................................................................. . 4 3. Example of implementation..................................................................... . 5 4. Hardware overview ................................................................................. . 6 5. Software overview ................................................................................... .10 Ed.01 Ref.3EU199919ENAA .1
- 4. A L C ET L Alcatel OmniPCX Enterprise Section - OmniPCX Enterprise overview .2 Ref.3EU199919ENAA Ed.01
- 5. A L C ET L Alcatel OmniPCX Enterprise Section - OmniPCX Enterprise overview General overview General information 50A01101000A000AAEN General overview General information Edition: 01 1. Overview The OmniPCX Enterprise R5.0 Lx (Linux version) is a private telephone switch based on an IP data network infrastructure. For clarity and concision, in the rest of this document, the term OmniPCX Enterprise is used for the Linux 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. Ed.01 Ref.3EU199919ENAA .3
- 6. A L C ET L Alcatel OmniPCX Enterprise General overview Section - OmniPCX Enterprise overview General information Figure 1 : OmniPCX Enterprise telephone system Call Server Wired UA sets IBS base stations (DECT or PWT) and mobiles Analog sets and fax machines IP-Phones IP network * Standard phone network V24 / IP adapt. Asynchronous VT100 terminal ACT Media Gateway RouterTo other IP networks OmniPCX Media Gateway OmniPCX Media Gateway IP IP-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 OmniPCX Enterprises 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.). For example (simplified) a set may be at idle, ringing or calling. When an event occurs (set unhooked for .4 Ref.3EU199919ENAA Ed.01
- 7. A L C ET L Alcatel OmniPCX Enterprise Section - OmniPCX Enterprise overview General overview General information example), this event is sent to the Call Server by the Media Gateway. The Call Server, according to set configuration and status, decides on the operations to be performed. In the case of an idle set being offhooked, 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 connects the 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 using T38 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 via public networks to make Wide Area Networks (WANs). Ed.01 Ref.3EU199919ENAA .5
- 8. A L C ET L Alcatel OmniPCX Enterprise General overview Section - OmniPCX Enterprise overview General information 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 Server Call 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 must be 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 only uses 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. .6 Ref.3EU199919ENAA Ed.01
- 9. A L C ET L Alcatel OmniPCX Enterprise Section - OmniPCX Enterprise overview General overview General information 4.2. OmniPCX Media Gateway The OmniPCX Media Gateway hardware comprises an S, M or L rack, common to both the OmniPCX Enterprise and OmniPCX Office. These racks respectively contain 3, 6 or 9 board slots. If 9 slots are 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 system can 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. Others are specific to the OmniPCX Enterprise. Ed.01 Ref.3EU199919ENAA .7
- 10. A L C ET L Alcatel OmniPCX Enterprise General overview Section - OmniPCX Enterprise overview General information Figure 3 : OmniPCX Media Gateway with extensions Call Server IP network Extension rack 1 1 2 OmniPCX Media Gateway 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 extension racks; 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 by the 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 OmniPCX Enterprise and OmniPCX 4400. .8 Ref.3EU199919ENAA Ed.01
- 11. A L C ET L Alcatel OmniPCX Enterprise Section - OmniPCX Enterprise overview General overview General information Figure 4 : ACT Media Gateway Call Server ACT Media Gateway IP network INT-IP board Interface board Public network DECT/RBS board 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 power supply or are directly connected to the mains (internal power supply). Internal or external batteries ensure operation if there is a mains power cut. 4.4. System with no Media Gateway There are OmniPCX Enterprise systems with no Media Gateway. In this case, the PCX only comprises elements 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. Ed.01 Ref.3EU199919ENAA .9
- 12. A L C ET L Alcatel OmniPCX Enterprise General overview Section - OmniPCX Enterprise overview General information Figure 5 : OmniPCX Enterprise ¡°Full IP¡± configurations Call Server IP-Phones IP network V24 / IP adapt. Asynchronous terminals RouterTo other IP networks V24 / IP adapt. 4.5. Safety The 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 and OmniPCX Media Gateways. 4.6. Voice mail and automated attendant The 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 as the Call Server, or work from a dedicated machine. 5. Software overview 5.1. Call Server The Call Server software is loaded on the hard drive at system installation. This software is unique for all configurations. Licenses and locks allow certain features to be allowed or barred according to the options 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 Gateway The Media Gateway software is downloaded from the Call Server at initial installation. This software is stored in flash memories. At subsequent startups, there is no download unless upgrade is required. .10 Ref.3EU199919ENAA Ed.01
- 13. A L C ET L Alcatel OmniPCX Enterprise Section - OmniPCX Enterprise overview General overview General information 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 is stored 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. The Call Server may be used as DHCP server. Ed.01 Ref.3EU199919ENAA .11