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The base station also relays the information until it reaches the MTSO. This way, "mother" knows where "baby" is.
Moreover, when the phone roams, its location is also relayed to the subscriber's home MTSO. If a Sprint subscriber from Peoria, IL, turns on his phone in an MCI service area in Boca Raton, FL, the phone's location is relayed until it reaches Sprint's Peoria MTSO - provided cell service is continuous between the points.
Temporary mobile identities: When digital cellular phones are registered into a system (usually defined within the area controlled by an MTSO), they can be assigned arbitrary shortened "nicknames." The cell phone and the system infrastructure use the new nicknames during call setup.
The MTSO will assign each of its cell sites some subset of this total.
This fact sets the stage for the most athletic aspect of cellular operations: the "handoff." When a mobile phone is turned on, its transceiver surveys the different control channels (the MTSO reserves some of the cellular frequencies to transmit command, identification and location information), locks onto the cell site with the strongest signal and registers itself with that base station.
Within the MTSO are landline trunk connections to all call sites and to a telephone company central office.
Photo: The Mobile Telephone Switching Office (MTSO) at Hickory Hills controls all of the cell sites in the Chicago metropolitan area, connecting the sites to the nationwide public phone network.
Thus, the four principles of cellular radio are: (1) use of multiple cell sites with lower-powered transmitters at each cell site controlled from a central location (the MTSO); (2) handoff of the telephone signal from one cell to another as the caller moves throughout the city; (3) reuse of frequencies several times throughout the city; and (4) growth of the system by subdividing cells into smaller units.
Verizon Wireless, a provider of a wireless voice and data network and a joint venture of Verizon Communications (NYSE: VZ) and Vodafone (NYSE:VOD) (LSE: VOD), announced on Thursday (9 October) that the company has completed its Mobile Telephone Switching Office (MTSO) in Omaha, Nebraska, USA.
Currently the Omaha MTSO handles over 4 million data connections and 2 million voice calls a month.
LS-ATS provides customized protection for larger facilities, such as remote switches or MTSOs. Remote Manager rounds out the product line, offering control, event logging and test capabilities that enhance site management.