[comp.dcom.telecom] CMT Ant-Rooftop vs Rubber Duckie

mearle@pro-party.cts.com (Mark Earle) (01/14/91)

On several occasions, I've taken my Uniden GTS-4000 phone, and
temporarily installed it in my work vehicle. This is a Chevy 1/2 van,
with only front window and driver/passenger side windows. Otherwise,
all metal. The CMT sits on a wooden work bench about three inches off
the floor, with a "gain" rubber duckie (Radio Shack's $30 product,
about one foot long).
 
My 'normal' installation is a roof-mounted Antenna Specialist gain
antenna fed w/low loss coax. Supposedly the "best" set up, compared to
on glass antennas, antennas with RG-58 feedlines, etc.
 
Well-in PRACTICAL terms, the phone on it's rubber duckie works as well
as when on a "real" antenna. Typical: On I-37, I lose the "home"
carrier at mile marker 90 with the "real" and with the rubber duckie
it's at mile marker 88. Big deal! Similar observations at other
"boundaries". Note, this is not ONE cell -- I'm not in that contest
<grin> ... but only the point I lose "home" and have to use "roam"
facilities.
 
So, not much real difference. Note: this is on Southwestern Bell
Mobile Systems, the wireline carrier. I incur no "roam" daily charge,
but there is this 'penalty'. From 2000-0700 daily, plus all day
Sat/Sun/Holidays, I pay 0.00 as the airtime rate. Peak is .38/min.
BUT, when in ROAM, it's .38 24 hrs/day. So I try and be aware if I'm
in ROAM, to the point of not letting the phone switch automatically. I
want to KNOW when the higher evening rate is in force.
 
Well -- at least compared to Higdon et all, I seem to have a
reasonable rate.
 
I posted this briefly before, but for summary/completness:
 
Plan     Rates
$40/mo   .38 P .00 OP
$24/mo   .38 P .21 OP
$15/mo   .58 P .58 OP
$125/mo  .22 P .22 OP

Note: all but the $15/mo plan include call waiting, forwarding
(conditional and immediate) and three way conference calling.  Note:
three way conference calling, and answering the call waiting beep,
incur 2x the airtime rate (of course, on weekends, with the $40/mo
plan, 2x 0 still = 0)
 
Also offered are:
Mail Service 1 4.95/mo
  10 msgs/30 secs duration 72 hour retention
Mail Service 2 9.95/mo
  20 msgs/60 secs duration one week retention
Pager Alert Feature $2/mo
Incoming call restriction $5/mo
Outgoing call restriction $5/mo
Toll Restriction (no 1+)  $5/mo
Mr. Rescue                $2.50/mo (gas/jump start)
Detailed Billing Statement$2.50/mo (included in $125 and $40 plan "free")
911 and 611 (service)     Free
One time service activation fee $25

You are also billed as follows in some cases:
 
If you make an outgoing call, and let it ring for longer than thirty
seconds, you are nicked one minute airtime.
 
If you leave your phone on, and have no forwarding in effect, AND the
callee lets it ring more than thirty seconds, you are nicked one
minute even if you don't answer.
 
Follow Me Roaming works as expected. Folks calling a remote roam port
Always get nicked for the LD call, because there is a "enter the
mobile number you wish NOW voice prompt" so they'll get docked even if
you don't answer.
 
As above, you'll get nicked if in a roam city, the phone is on, and
the callee lets it ring more than thiry seconds.
 
Directory assistance: always billed at .40/call within SWB area. DA to
your LD carrier for calls outside SWB are between you and them (mine is
AT&T, .60/request). No "allowance". Airtime also applies if during Peak,
so a local DA call costs at least 78 cents. Makes one keep the pocket
minder up to date!
 
Conditional forwarding: after three rings, the caller gets a voice
announcement, "please wait, your call is being forwarded". The process
takes about one minute! You are NOT billed airtime for conditional
forwarding, nor for immediate forwarding, regardless of how long the
callee lets it ring.
 
Anyhow, that's most of the stuff I can think of for my particular
service.  Overall-it's great, much more flexible than the pager I used
to carry, and fairly priced. Now, if that 0.00 airtime was 24
hours !!!!!!!!! or if it was .05/min, or something like that.

My comments earlier regarding the "real" vs "rubber duckie" coverage,
are for calls made-not simply when the roam light or no service
are or are not on. I get indication of service about five miles before
it is actually useable; but once "there" it's dead solid, no static
or problems. 


mearle@pro-party.cts.com (Mark Earle) [WA2MCT/5]   
CIS 73117,351                MCI Mail to: MEARLE   
My BBS: (512)-855-7564       Opus 1:160/50.0       
Blucher Institute, Corpus Christi State University 


[Moderator's Note: Ameritech does not have bad rates at night, and I
am fortunatly grandfathered into a plan they no longer offer: Off peak
hours (9 PM to 7 AM plus all day Saturday and Sunday the rates are ten
cents for the *first three minutes* and ten cents per minute
thereafter. It is less expensive than any payphone I've seen. Of
course daytime rates under my (grandfathered) plan are 65 cents a
minute, but then I rarely use the phone during daytime hours; why
bother since I have oa phone on my desk in the office to use.   PAT]

dave@westmark.westmark.com (Dave Levenson) (01/15/91)

In article <16050@accuvax.nwu.edu>, mearle@pro-party.cts.com (Mark
Earle) writes:

> Well-in PRACTICAL terms, the phone on it's rubber duckie works as well
> as when on a "real" antenna. Typical: On I-37, I lose the "home"
> carrier at mile marker 90 with the "real" and with the rubber duckie
> it's at mile marker 88. Big deal! Similar observations at other
> "boundaries". Note, this is not ONE cell -- I'm not in that contest
> <grin> ... but only the point I lose "home" and have to use "roam"
> facilities.

I think Mark is saying that he gets switched from HOME to ROAM at
approximately the same point regardless of which antenna he's using.
Somehow, that is not surprising.  One switches from HOME to ROAM when
one's cellular telephone set discovers that it is closer to a cell
belonging to a system other than the one it considers to be its home
system.  That should happen at the same geographic location every
time, unless cells are being created or moved.  The fact that it
varies by a mile or two is probably the result of some granularity
introduced by the timing of the periodic locate interval in the mobile
unit.  I think they typically re-scan the setup channels and
re-determine which one is strongest every minute or two when they're
idle.

The mobile antenna choice probably affects overall signal strength,
and possibly the directionality of the coverage, but not the relative
strength of two neighboring carriers.


Dave Levenson		Internet: dave@westmark.com
Westmark, Inc.		UUCP: {uunet | rutgers | att}!westmark!dave
Warren, NJ, USA		AT&T Mail: !westmark!dave
Voice: 908 647 0900     Fax: 908 647 6857