Massachusetts Bay Transit Authority

Radio ID/Call Numbers

Rail Vehicles

Radio IDs are 2 followed by their 4-digit road number (Eg. 3707 is 23707, 1608 is 21608, 0704 is 20704). Call numbers (similar to call sign) are the same as the train's lead unit road number. Often the leading digit will be dropped (Eg. 3707 would call as 707, 1608 as 608, 0704 as 704).

Buses

Radio IDs are 1 followed by their 4-digit road number (Eg. 1313 is 11313, 1856 is 11856). Call Numbers are the same as the bus's road number.

Portables

Portables are any radios that aren't permanently mounted in any vehicle. Their radio ID is irrelevant to their use. Their call numbers are based on where they are based, and is always preceded by "portable ###" when talking.

Known portable numbers are: 902-Gov't Center(GL), 903/904-Park St (GL) 909-Kenmore, 916-Fenway, 920-Huntington Ave/Brigham Circle

Transit ambassadors also have radios, but they identify themselves as "Transit ambassador at ___ station"