Private Mobile eXchange

Replicating a 2G GSM/3G UMTS Network in Software

Privae Mobile eXchange

Private Mobile eXchange (PMX) replicates a cellular network in software and, along with one or more Picocell, forms the core of all PMN solutions. PMX creates a self contained, privately owned and managed mobile network based on standard 2G GSM/3G UMTS protocols, providing the ability to access voice services using mobile handsets over a private network. The private network can interface with or replace a PBX to create a fully mobile workforce within the network's coverage area.

PMN now providing 2G GSM/3G UMTS voice, SMS & data.

The PMX can be used in a standalone solution to provide communications services between closed communities of users. Alternatively, it can be integrated directly to a carrier or company network for offsite calls. This allows companies to integrate cellular telephony into their enterprise PBX or IP-PBX infrastructure via SIP, empowering staff with greater freedom and mobility around their site and reducing mobile call costs for calls made between individuals in the business.

Business investment in legacy devices is protected while the need to add a wireless LAN infrastructure and employ new phones having multiple wireless interfaces in order to support an integrated IP-wireless solution for employees is avoided. In the private network, mobile handsets are used to make both internal and external calls and to send SMS messages, in exactly the same way as within a macro mobile network.

The PMX software runs on standard Intel server hardware. If the network environment is extended because of a merger or acquisition, then all new sites and communications systems can be incorporated into the same overall network architecture.

The PMX comprises separate software components that together create an integrated switching environment. The outputs from this mobile exchange are SIP (Session Initiation Protocol). SIP is able to interface with industry standard gateways.

The software MSC (Mobile Switching Centre) controls access to the private network and it enables interoperability with PBXs and/or IP-PBXs, thereby extending the reach of any available SIP-based telephony applications.

The solution comprises both hardware and software components. The network signal is provided by a Picocell. The Picocell is connected to an IP network. PMN can be deployed using a server - the Private Mobile eXchange (PMX), or as a hosted service from an accredited service provider.

Mobile phones can be used to make calls from the workplace for the same cost as calling from an internal telephone extension. Staff can call colleagues on-net, over the corporate network, without incurring any call costs. Mobile calls from the office to external destinations would be charged at the company’s normal landline tariff.

The PMX software consists of three software components:

  • A Mobile Switching Centre (MSC)
  • A translation and routing database
  • A Short Message Service Centre (SMSC)
  • Plus the option to provide GPRS using an industry standard GPRS Service Node (GSN)

The MSC component of PMX controls the access to the private mobile network and restricts this to known users to provide standard PBX features such as intelligent call routing and short code dialing.

Private Mobile eXchange (PMX)

Private Mobile eXchange (PMX) replicates a GSM cellular network in software and, along with one or more Pico cell (also called Base Transceiver Stations), forms the core of all PMN solutions. PMX creates a self contained, privately owned and managed mobile network based on standard GSM protocols, providing the ability to access voice services using 2G and 2.5G mobile handsets over a private GSM network. The private GSM network can interface with or replace a PBX to create a fully mobile workforce within the network's coverage area.

Download: PMX Technical Specification | Find Out More