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| Re: CBTC- Was: Re: Question about Museum Equipment (1365594) | |||
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Re: CBTC- Was: Re: Question about Museum Equipment |
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Posted by Stephen Bauman on Sun Sep 6 17:37:16 2015, in response to Re: CBTC- Was: Re: Question about Museum Equipment, posted by Dj Hammers on Sun Sep 6 01:35:28 2015. Unless I'm mistaken, the goal is to ensure that everything is cross compatible.That was the goal. However, NYCT allowed Siemens to convince it to use Siemens own proprietary digital communications system (DCS) for the Canary Sea implementation. The DCS is the radio communication system between trains and wayside equipment. It's what the Bell System did prior to the Carterphone decision. Prior to this all the vendors used a commercial radio transmitter that used an internet protocol interface to connect to trainborne and wayside equipment. Siemens did not really have an in-house proprietary system. They bought a radio transmitter/receiver from another vendor and kludged something together. The problem is the radio transmitter is no longer made. This is one reason it has been so difficult to expand rush hour service on the 14th St line. There's no off the shelf conversion kit that NYCT can order to run some R160's on the 14th St Line. Most CBTC installations that use radio for the DCS, use a variant of wireless internet - IEEE 802.11. Supposedly that's what will be used by NYCT for the Flushing Line and additional conversions. Unfortunately, Tom Sullivan died so there is nobody publicly tracking what NYCT is doing. |
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