Editing Toronto Transit Commission (section)

===Communications===
{{more citations needed|section|date=October 2018}}
The TTC uses three primary voice and data communication systems. The first is the system used by Operations, Security and Maintenance. This system operates on five [[Ultra high frequency|UHF]] conventional frequencies. Channels 1, 3, 4 and 5 are used for day-to-day operations, while Channel 2 is reserved for the [[Wheel-Trans]] service.

The second system, the Communications and Information System (CIS), is used by buses and streetcars, and employs transmission facilities throughout the city. Conceived in the late 1970s and fully implemented in 1991, it consists of a computer unit on board each bus and streetcar, called the Transit Radio Unified Microprocessor (TRUMP). This is attached to a [[transponder]] receiver, which allows CIS operators to [[automatic vehicle location|track the location of the vehicle]] using a computational system known as [[dead reckoning]]. The TRUMP unit also allows vehicle and CIS operators to send and receive [[text messaging|text messages]] for such things as [[short turn]]s and [[detour|route adjustments]]. There is also the option of voice-based communication between the vehicle and CIS operators. With the introduction of [[NextBus]] technology to provide real-time arrival information, the CIS has been updated to use a combination of [[Global Positioning System|GPS]] data and the previous dead reckoning ([[signpost]]-based) system. In the event that internally managed TTC communications are unavailable, the TRUMP unit operates on [[Bell Mobility]]'s [[Code-division multiple access|CDMA]] network to communicate with divisional operations and transit control.

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Each TRUMP unit on every streetcar and bus is equipped with a silent "yellow alarm" key which can be activated by the operator in the event of an emergency on board. When activated, CIS supervisors and transit control dispatchers are able to hear what is going on via a high-quality boom microphone located in front of the steering wheel and dispatch emergency responders. There is also a "red alarm" key, which enables one way communication with CIS once pressed. This can be used in events such as fires when immediate assistance is required and two-way voice communication would prove detrimental to safety.-->
In 2012, the TTC began research into transitioning from the outdated and antiquated CIS to a newer [[computer-aided dispatch]] (CAD) system. Utilizing this technology would help improve headways, provide more reliable communications and allow divisional supervisors to locate vehicles in real time (the current GPS system only sends location updates every 20 seconds). Implementation of the system, later named the Vehicle Information System & Integrated Operations Network (VISION), began in 2016,<ref>{{Cite web| url=https://www.ttc.ca/About_the_TTC/Commission_reports_and_information/Commission_meetings/2016/January_21/Reports/Presentation_Vision_Program.pdf | title=Vehicle Information System & Integrated Operations Network | access-date=October 30, 2018 | archive-date=January 24, 2021 | archive-url=https://web.archive.org/web/20210124040246/https://www.ttc.ca/About_the_TTC/Commission_reports_and_information/Commission_meetings/2016/January_21/Reports/Presentation_Vision_Program.pdf | url-status=dead}}</ref> with the contract for associated equipment awarded to Clever Devices ULC.<ref>{{Cite web| url=https://www.ttc.ca/About_the_TTC/Commission_reports_and_information/Commission_meetings/2017/February_21/Reports/6_Presentation_VISION_Program_Update.pdf | title=Presentation: VISION Program Update | access-date=October 30, 2018 | archive-date=January 17, 2021 | archive-url=https://web.archive.org/web/20210117230214/https://www.ttc.ca/About_the_TTC/Commission_reports_and_information/Commission_meetings/2017/February_21/Reports/6_Presentation_VISION_Program_Update.pdf | url-status=dead}}</ref> After extensive testing, deployment of VISION on vehicles in revenue service began in the summer of 2018, with plans to fully equip the entire bus and streetcar fleet by 2019.<ref>{{Cite web| url=https://www.ttc.ca/Coupler/PDFs/TTC%20Corporate%20Plan%202018-2022.pdf | title=Advancing to the next level | access-date=October 30, 2018 | archive-date=January 19, 2021 | archive-url=https://web.archive.org/web/20210119094338/https://www.ttc.ca/Coupler/PDFs/TTC%20Corporate%20Plan%202018-2022.pdf | url-status=dead}}</ref>

The third system, known as the "wayside system", consists of UHF [[MPT-1327]] [[Trunking]] radio sets used by the three heavy-rail subway lines. They replaced older devices which communicated by the third rail, and are divided into separate systems representing their respective subway lines. This trunking system allows Transit Control to communicate directly with a single train, a zone encompassing several trains, or the entire line. (Line 3 Scarborough uses a single channel UHF system, much the same as the system used by operations staff.)

All of these systems can be monitored by a [[Radio scanner|scanner]] capable of the UHF Low band (406–430&nbsp;MHz).<ref>{{cite web |url=http://transittoronto.ca/spare/0018.shtml |publisher=Transit Toronto |title=TTC radio – some background information |first=John |last=Lennox |date=November 10, 2006 |access-date=July 21, 2007}}</ref> Numeric codes—often referring to people or positions (299 Bloor – Subway Line mechanic at Bloor)—are also announced through the radio and the overhead paging system. The TTC also has several "Plans" ("Plan A" through "Plan G")<ref>{{cite web |url=http://transittoronto.ca/subway/5013.shtml |publisher=Transit Toronto |title=What do all those TTC emergency plans mean? |date=September 29, 2009 |access-date=October 9, 2009}}</ref> that are used in emergencies but are not announced on the PA system and only referred to on the radio.<ref>{{cite web |url=http://transittoronto.ca/subway/5007.shtml |title=Subway/RT P.A. Code Numbers |access-date=July 21, 2007 |date=November 10, 2006 |publisher=Transit Toronto}}</ref>

====OneStop media system====
[[File:Vaughan Metropolitan Centre Station (39176632581).jpg|thumb|Large LCD television screens that display the news and updates for TTC services are installed in most subway stations, such as [[Vaughan Metropolitan Centre station]].]]
The TTC, in partnership with Pattison OneStop (formerly OneStop Media Group), have installed large LCD television screens in most subway stations throughout the system except on [[Line 3 Scarborough]] and at the [[Toronto–York Spadina subway extension]] ({{stl|TTC|Downsview Park}} to {{stn|Vaughan Metropolitan Centre}}) stations. The new media system replaced the old "Subway Online" system, which were decommissioned.

The signs feature third-party advertising, news headlines and weather information. From its inception in 2005 until December 31, 2017, the news feed and advertising for television programs were supplied under a contract with [[Bell Media]]'s 24-hour local cable television news service, [[CP24]]. Since January 1, 2018, the service has been provided by [[Global Television Network]]'s Toronto television station [[CIII-DT]] 41, which is owned by [[Corus Entertainment]].<ref>{{cite web |url=https://globalnews.ca/news/3964710/global-news-ttc-screens/ |title=Global News named content provider for TTC screens by PATTISON Onestop |website=globalnews.ca}}</ref> The signs also provide TTC-specific information regarding service changes and delays, information pertaining to using the system, and [[Toronto Police Service]] alerts about suspects.<ref>{{cite web |url=http://www.222tips.com/index.php?pt=news&sec=4&sub=1076 |archive-url=https://web.archive.org/web/20070802112236/http://www.222tips.com/index.php?pt=news&sec=4&sub=1076 |archive-date=August 2, 2007 |title=Toronto Crime Stoppers Launches 'UNDERGROUND ALERT' |date=June 12, 2007 |publisher=Toronto Crime Stoppers |access-date=July 21, 2007}}</ref><ref>{{cite news |url=https://toronto.citynews.ca/2007/06/12/wanted-criminals-to-show-up-on-subway-monitors/ |work=CityNews |title=Wanted Criminals To Show Up On Subway Monitors |access-date=December 27, 2014 |date=June 12, 2007}}</ref> The system can also be used when an [[Amber alert]] is issued, which also may include announcements via the PA system.

In September 2008, [[Dundas station (Toronto)|Dundas station]] was the first to feature a "Next Train" announcement integrated into the signage. The system has been expanded to many other stations since its initial rollout.<ref>{{cite web |url=http://www3.ttc.ca/Media_releases/TTC_begins_rollout_of_next_train_arrival_signs.jsp |archive-url=https://web.archive.org/web/20081002044429/http://www3.ttc.ca/Media_releases/TTC_begins_rollout_of_next_train_arrival_signs.jsp |archive-date=October 2, 2008 |title=TTC begins rollout of next train arrival signs |date=September 3, 2008 |publisher=Toronto Transit Commission |access-date=December 27, 2014}}</ref> Since mid-July 2009, the majority of stations have been equipped with this service and since January 2018 – coinciding with a content provider switch from CP24 to [[Global News]] – the next train arrival time notices were also updated to provide the line number and the destination of the next train. The TYSSE stations have screens that display the arrival times for the next two or three trains. Unlike the older screens, these screens neither display news nor weather headlines provided by Global News.