Wy-Co intertie
Howdy all: hope everyone had a Merry Christmas & Santa was very good to you.
Question came up the other day about the Wyo WyoLink to Colo CCNC intertie talkgroup & how it works.
The intertie is fairly simple, it's just a small Motorola Consolette 800 MHz base radio at the 85 South site, programmed up on the CCNC system and set on the WY-CO talkgroup. Not sure what site in Colo it would normally talk to, it was programmed up by Moto awhile back and being on CCNC would make the WY-CO talkgroup part of the Colo 800 system fleetmap.
On the WY end, it appears on all of the WHP & TMC dispatch consoles as a simple TG channel, which is then cross-patched to whatever WY TG will be used by the WY units, could be a CAT but more likely to be a MAT. Same thing happens on the CO end, the WY-CO TG is cross-patched to whatever CCNC TG they want to use for their cars in the operation.
We do not have WY-CO programmed into any subscriber units in WY that I know of - it's a CCNC 800 TG & our VHF units can't cross-program with the CCNC 800 system, so no point in it - and my understanding is that on the CO side it's also only going to their dispatch consoles for the patches. Haven't heard it used very often other than testing, which sounded pretty good and seemed to work well.
To a large degree, the limiting factor on CCNC-mobile-to-WyoLink-mobile operations looks to be CCNC 800 coverage into WY - unless the Colo units are set up for multi-system operation & can switch to WyoLink to get on to the Fox Farm & Archer sites & could access a WyoLink system WY-CO TG directly - but then how do they get back to their dispatch which probably isn't set up to access the WyoLink VHF or 800 directly, which would be needed because they're on WY-CO TG all right, and on 800 to boot, but now they're on a different trunking system. Even if WY-CO TG were duplicated on both systems, it wouldn't cross over.
VHF coverage south into Colo isn't a problem, neither is coverage east in Neb. In both cases, during early WyoLink construction, we reached out to those states on frequency coordination agreements that if they would allow the border sites 85 South & Russell Hill to use omnidirectional antennas for the Interstate highways, instead of the standard "beam-it-into-your-own-area-with-directional-antennas" approach, we would provide room for their respective systems to use these sites for enhanced cross-border coverage on their systems. This cooperative philosophy was continued at all of the later WyoLink sites such as Mt Pisgah & Warren Peak, and also the WyoLink installations in ID at Hell Hole & Black Mountain. Gives good mobile coverages, but importantly also enables nearby dispatch centers in the adjacent state to access WyoLink directly with a control station if & where desired.
There was some talk awhile back about a similar WY-UT intertie, UCAN 800 system has a couple of sites in Uinta County WY so 800 coverage wouldn't be nearly as limited. Bigger problem is WHP VHF cars running west into Echo Canyon down I80 and is being looked at first.
A WY-ID intertie to their 700 system would be about identical to the WY-CO link, and so would Montana and South Dakota and Nebraska, looks like these have not been pursued mostly because of waiting for the CSSI and ISSI interfaces to be worked out so that they could be used instead (along with funding, of course...).
Regards,