Scope

Remote Extension (Mobile Extension) is an application that allows ordinary mobile phones in the PLMN or terminals in the PSTN network be treated as ordinary PBX extensions that have access to most of the features of the MX-ONE PBX (such as a local phone book, internal short numbers, and access to the PBX operator), and supporting MX-ONE PBX services such as automatic call back, service class restrictions, call information logging, and so on. For more information, see the description for Remote Extension, RE.

If there is SIP trunk connectivity to the PLMN, then the mobile/remote extension shall be deployed using SIP extension and SIP trunk. For details on this configuration, see the operational directions for Remote Extension Over SIP.

Note the following limitations when mixing different connection types to the PLMN: If a Remote Extension user is using SIP trunk, no alternative routing via ISDN, H.323, DASS, DPNSS or CAS trunk is supported. If a Remote Extension user is using ISDN, H.323, DASS, DPNSS or CAS trunk, no alternative routing via SIP trunk is supported.

  • In the MX-ONE mobile and fix remote extension are not differentiated. The same license is used. In the MX-ONE a mobile extension can have alternate answering positions. Fixed and mobile are properties of the public network and for the PBX, these extensions are just seen as remote extensions.

  • The Remote Extension service in the PBX cooperates with services in the mobile network, either in the Mobile Switching Center (MSC), Home Location Register (HLR), and Visitor Location Register (VLR) or in the custom services of an Intelligent Network (IN) based system. In the MX-ONE mobile networks this is handled by the Network ME Service (N-MES) and Mobile Extension IN Support (MEINS) respectively.

  • The PLMN network must detect calls to or from the ME clients and route them through the PBX. These calls will be charged in a uniform way in the mobile network, as the PBX handles the routing, the number translations, and the main charging. Support in the mobile network is not mandatory. Mobile extension routing can also be handled by the client side.

  • Remote (Mobile) Extension realizes the OnePhone concept, where each employee just needs one extension for all telephony communications inside or outside of the PBX premises. One phone, one number, one mailbox.

  • Abroad the mobile phone will work as a normal mobile phone.

Parent topic: Introduction
Parent topic: Remote Extension Planning — Description
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