Mobile Telephone System

Mobile Telephone System
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Mobile phone and data
standards
0G
PTT
MTS
IMTS
AMTS
OLT
MTD

0.5G
Autotel/PALM
ARP

1G
NMT
AMPS
Hicap
CDPD
Mobitex
DataTac

2G
GSM
iDEN
D-AMPS
IS-95/cdmaOne
PDC
CSD
PHS

2.5G
GPRS
HSCSD
WiDEN

2.75G
CDMA2000 1xRTT/IS-2000
EDGE (EGPRS)

3G
W-CDMA
UMTS (3GSM)
FOMA
TD-CDMA/UMTS-TDD
1xEV-DO/IS-856
TD-SCDMA
GAN/UMA

3.5G
HSDPA

3.75G
HSUPA
HSOPA

4G
Frequency bands
SMR
Cellular
PCS

The Mobile Telephone System (MTS) was one of the earliest mobile telephone standards. It was operator assisted both directions, meaning, if you were called from the PSTN the call would be routed to a mobile operator, who would route it to your phone, and your phone would ring, however to make an outbound call, you had to go through the mobile operator, who would ask you for your mobile number and the number you were calling, and then would place your call for you.

This service originated with the Bell System, and was first turned up in St. Louis on June 17, 1946. The original equipment weighed 80 pounds, and there were initally only 3 channels for all the users in the metropolitan area, later more licenses were added bringing the total to 32 channels across 3 bands (See IMTS Frequencies).

This service was used at least into the 1980s in large portions of North America.

This protocol was replaced by IMTS (Improved Mobile Telephone System).

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