Slow right now so I'll post this and finish later: 2-3 pm
Twitter Feed of Susan Clairmont, The Spec October 13, 2016 after lunch break ~2 pm
Cheryl Gzik is the Crown attorney on the case, while Russell Silverstein is representing Badgerow.
Feed Start--you can read this top to bottom.
Jury is back in at the Robert #Badgerow murder trial.
Next witness is Phillip Johnston. Crown Cheryl Gzik wishes him qualified as an expert witness on the 911 system in #hamont in 1981.
He went to @MohawkCollege for electrical engineering before joining Bell Canada.
While at Bell he was involved in tracing 911 calls.
He did "thousands" of call tracings. He worked in #hamont in 1981. Justice Flynn qualifies Johnston as an expert.
911 was designed for speedier access to emergency assistance and allowed for a call to be held and rung back by a 911 operator.
911 system put in place in #hamont in about 1980, Johnston says.
Had to put a new circuit board in pay phones so they could call 911. Bell kept careful track of locations of all its pay phones.
Businesses would get a share of pay phone profits on their property.
"SP1 was a computerized front end with a cross-barred back end...," says Johnston, explaining highly technical aspects of 911 system.
Jury has been bombarded with a lot of very specific, technical info today. I hope they understand it better than I do.
In 1981 all 911 calls were answered by @HamiltonPolice. If police needed to trace a call, they dialled right into special @Bell tester.
The tester would find out what "trunk" call was on.
A successful trace would call up a trunk line on an older system which would then lead to a phone number.
In a newer system, a trace would come up with an actual phone number.
Bell tester would verify he could hear the busy tone on the trunk and would relay address to @HamiltonPolice.
Nobody other than @Bell could access address of a phone booth from a trace.
Once @Bell handed address over to police, Bell "was out of the picture." A trace could take up to 20 minutes to completely.
Trace has to be verified so they know they have traced to the right place "and they didn't make a mistake."
"If a trace wasn't completed, we wouldn't have a phone number," says Johnston.
911 was the only system that could hold a call from "end to end." Unlike other calls in 1981 that would end when someone hung up.
Police could keep the line up and ring it back. Someone making a 911 call wouldn't necessarily know it was being recorded
12:45 p.m. telephone tester phones police. Johnston thinks it is @Bell saying pay phone is at Gate 6 at Dofasco.
In 1981 #hamont did all 911 calls for the region.
If the @Bell tester phones @HamiltonPolice back with an address, the trace was successful, says Johnston.
Jury being shown this @HamiltonPolice photo of the phone booth at Gate 6 at Dofasco.
Another @HamiltonPolice photo of the Dofasco phone booth.
This is @HamiltonPolice photo of first officer at Dofasco phone booth to guard it after 911 trace. #Badgerow
Crown Gzik done. Now Silverstein doing his cross. Asking where @HamiltonPolice 911 call room was in 1981. Johnston does not know.