In addition to these fixed operators, many military, air charter, corporate, air ambulance, and other flying services operate from the airport.

Geographic Number Portability (between fixed operators) was introduced on 26 April 2010.

Firstly, from the legal standpoint, any discrimination in favour of mobile operators or fixed operators is pointless.

The PSTN or fixed operators in Bangladesh are:

Nokia offers a 70% revenue share of gross sales, net of refunds and returns, less applicable taxes and, where applicable, fixed operator billing costs.

Since it is becoming increasingly easier to access content and contacts using mechanisms outside the control of traditional wireless/fixed operators, the interest of IMS is being challenged.

In Estonia, number portability is required from fixed operators since January 1, 2004 and should be required from mobile operators as from January 1, 2005.

It enables low cost text messaging, low cost international calls and instant messaging services, saving its users up to 90% on phone bills compared to the cost of traditional mobile and fixed operators.

The Mobile Number Portability Company is jointly owned by the mobile and fixed operators including Vodacom, MTN, Cell C, Telkom and Neotel.

The third inequality follows from the fact that the probability for a fixed operator not equal to the identity commuting with the stabilizer operators of a random stabilizer can be upper bounded as follows:

IP exchange or (IPX) is a telecommunications interconnection model for the exchange of IP based traffic between customers of separate mobile and fixed operators as well as other types of service provider (such as ISP), via IP based Network-to-Network Interface.

The Interconnection Exchange (ICX) will receive all calls from the mobile and fixed operators whenever the call is made to other network and will pass it to the destination network if the call is local, and will pass to the IGWs if the call is international.