Originally Posted by Ambulance2014
I am wondering if there is anybody out there that have narrowed it down to what channels are used in Calgary on the AAR Channels and what there channel Description is. I do receive frequency 160.4850 quite frequently but don't know if it a channel here in Calgary or what its description is to know what they are talking about?
Any railroad Scannerists out there I would appreciate it if you could help me out . Also how often does anybody here the MacLeod Frequencies on the Pacific railway frequency's ?
and what doe the following mean ?
RTC Call in
What do these channels Mean in there descriptions?
Greg was sort of right.
The Authorities channels are more used on OCS (Occupancy Control System) territories, where train movements are controlled by handwritten clearances rather than signals (CTC.)
As giving a train a clearance can sometimes be rather lengthy, the RTC will ask the crew to switch to the authorities channel to give them their clearance and not tie up the train standby channel.
I'm not exactly sure how the authorities channel is used in CTC territory, as I mainly worked OCS desks during my short time as an RTC with Canadian Pacific.
Just dug out my Alberta Region ETT... For Calgary Terminal, CP4 is the Train Standby channel for all four subdivisions that meet in Calgary (Laggan, Red Deer, Macleod and Brooks.) These channels only apply within cautionary limits.
For Train Standby outside of CL, the Laggan, Macleod and Brooks Subs use CP1. (B/E CTC limits west of SNS Sunalta for the Laggan sub, east of SNS Sheppard (the intermodal yard on the east end of town) on the Brooks Sub and south of SNS Midnapore on the Macleod Sub and on south to where it becomes the Aldersyde sub south of High River. The Red Deer Sub also switches to CP1 north of SNS Zoo -- many foamers think the channel switches at the CTC limits at SNS Airdire, but it's well south of where it switches from CTC to OCS.)
The two CTC territories (Laggan and Brooks subs) use CP7 for authorities, while the Macleod Sub uses CP86 and the Red Deer Sub uses CP5.
Here's the frequencies:
Like I said, I used to be an RTC for Canadian Pacific. If you've got any other questions, feel free to ask.