Types of GSM

1. GSM 900: The original GSM system operating in the 900 MHz band.

2. GSM 1800: Also known as DCS 1800, operates in the 1800 MHz band.

3. GSM 1900: Known as PCS in North America, operates in the 1900 MHz band.

4. GSM-R: A special GSM version for railway communication systems.

DCS 1800

DCS 1800, or Digital Cellular System 1800, is an adaptation of GSM technology operating in the 1800 MHz frequency band. It offers enhanced spectrum efficiency and supports higher data rates compared to GSM 900, making it suitable for densely populated urban areas.

GSM-R

GSM-R, or Global System for Mobile Communications – Railway, is a GSM variant tailored for railway communication. It supports secure and reliable communication between train drivers, dispatchers, and trackside workers, enhancing safety and operational efficiency.

GSM-R operates in the 900 MHz or 1800 MHz bands and incorporates advanced features like group calls, voice broadcast services, and emergency calls tailored to the needs of the rail industry.

PCS 1900

PCS 1900, or Personal Communications Service 1900, is a GSM variant used primarily in North America. Operating in the 1900 MHz frequency band, PCS 1900 provides high-capacity and improved coverage in metropolitan areas.

Similar to other GSM systems, it supports various services such as voice, messaging, and data transmission, ensuring robust mobile communication.

GSM 450

GSM 450, also known as GSM 400, is a version of the GSM mobile communications standard specifically adapted for the 450 MHz frequency band. It is designed for deployment in regions where lower frequencies are preferable for extended coverage, such as rural and remote areas.

GSM 450 provides the usual GSM services like voice, SMS, and data transmission while facilitating better penetration through obstacles and longer cell ranges.

GSM 480

GSM 480 is a variation of the GSM standard that operates in the 480 MHz frequency band. It is optimized for use in regions where this frequency is advantageous for achieving extended coverage and improved signal penetration.

Like other GSM variants, GSM 480 supports a range of services including voice calls, SMS, and data transmission, making it suitable for both urban and rural deployments.

GSM 850

GSM 850, also known as GSM 800, operates in the 850 MHz frequency band. It is primarily used in the Americas and Oceania.

The lower frequency band allows for better signal penetration through buildings and extended coverage in both urban and rural areas.

GSM 850 supports all standard GSM services such as voice, SMS, and data transmission, ensuring reliable and widespread mobile communication.