GSM

A network technician is deploying mobile phones for a company's sales staff.

Salespeople frequently travel nationally and internationally to meet with clients, and often have to roam or switch cellular providers.

Which of the following standards is the BEST option to fit the requirements?

A.

GSM

B.

TDM

C.

CDMA

D.

PSTN

E.

MIMO.

A.

The best option for mobile phones used by sales staff who frequently travel nationally and internationally and switch cellular providers is the Global System for Mobile Communications (GSM) standard.

GSM is a standard for cellular networks that allows for voice and data communication. It is used by mobile networks in Europe, Asia, and other parts of the world, and is the most widely used mobile phone standard globally. GSM provides a global roaming feature, which allows users to use their phones in different countries and switch between different cellular providers.

GSM phones use a SIM (Subscriber Identity Module) card, which contains the user's phone number and other information, and can be easily swapped out when switching between cellular providers. This makes it a convenient option for sales staff who frequently switch providers to get the best coverage and rates while traveling.

TDM (Time Division Multiplexing) and CDMA (Code Division Multiple Access) are also standards used for cellular networks, but they do not offer the same level of global compatibility and roaming capabilities as GSM. PSTN (Public Switched Telephone Network) is a standard used for landline telephone networks and is not relevant to mobile phones. MIMO (Multiple-Input Multiple-Output) is a technology used in wireless communication to improve signal strength and data rates, but it is not a mobile phone standard.

Therefore, GSM is the best option for mobile phones used by sales staff who frequently travel and switch cellular providers.