Cellular Essay (ameritech) Essay

This essay has a total of 1169 words and 10 pages.

Cellular Essay (ameritech)


The orange is the home digital service area and the yellow is analog service area.
Ameritech also offers free long distance all over the U.S.A. With a special package deal
they have going right now. For sixty-five dollars a month you get 325 minutes per month.
For their Chicago land service area it depends on which plan you pick, because the local
rate per minute could either be .25 cents or .29 cents per minute for local calls that
went over your minutes you received for free already. The price per minute also changes
depending on if you are in the peak or off peak time slots. Peak hours are from 6 a.m. to
10 p.m. Monday through Friday. Off peak times are from 10:01 p.m. to 5:59 a.m. Monday
through Friday. Saturday and Sunday are all day off peak and some holidays. Long distance
runs from .25 cents per minute to .35 cents per minute. Depending on the distance it
varies. If you leave your service area and enter another then roaming charges will be also
added. If you decide to go with a cellular phone they have package deals that include a
cell phone for a thirty five-dollar activation fee. They offer several packages to meet
everyone's needs. You may also upgrade to a better phone, but then you must purchase that
phone.




I contacted Ameritech and they told me that because I wasn't a business that they were
unable to release that information. They then told me that they would get a hold of one of
their managers and maybe they could give me this information. They took my name and number
and I never received anymore information. I told them this was for a school project, but
that didn't matter.




The PBX I chose was Meridian1 option 11c. This is a powerful PBX that comes in a small
package. It supports 30 to 400 lines. Some other features are digital telephones, in
building wireless communications, voice messaging, call center, PC-based system
management, Ethernet connection, remote connection, keycode software activation, and
multimedia applications. This PBX can be easily upgraded to new capabilities. Some of the
programs that this PBX can run are Computer Telephony Integration (CTI), Customer
Controlled Routing (CCR), and Integrated Voice Response (IVR).




Dual-tone multifrequency dial (DTMF) is a keypad containing 12 to 16 buttons. These are
arranged in columns and rows. When the buttons are pushed they send two tones to the
central exchange. The central exchange decodes the tones and rings the destination. A
rotary phone or pulse dialing phone is sent over by clicks. The rotary dial contains two
separate contacts. These contacts open and close for every digit. So if the number 3 were
dialed, then the contacts would open and close 3 times. But a pulse dial will not pass
through the central exchange. Which means that if a voice mail system answers you can not
get through to the menu options. The number 8 tones are column 1336 Hz and row 852 Hz. For
the central office to receive the tone it must be present for 40 ms and a pause of 60 ms
between digits. For a rotary phone it takes 15 seconds to transmit 10 digits.




Carried Load: calls that are served, traffic that is carried to its destination



Offered load: arriving calls, calls attempting to enter a system



Blocked calls: traffic that can not be carried to its destination, blocked calls leave the
system or overflow to another circuit




Blocked Calls-Cleared: upon receiving indication that all circuit are busy and can not be
handled, the caller hangs up and is lost to the system.




Blocked Calls-Delayed: upon receiving indication that all circuits are busy, the caller
waits and is held in the system until it can be processed.




First attempt traffic is a formula that Jacobsen developed to figure the percentage of
people who retry their call immediately.




The Jacobsen retrial table assumes that 70% of the people retry immediately. Henry
Jacobsen developed all of the retry tables. These tables help the server's figure out how
many blocked calls that they receive. This allows them to figure if they need more lines
or how many lines they will need in a certain area.




PCS: Personal communication service, transmit 1850-1910 MHz, receive 1930-1990 MHz



PCS 1900: Provided by time division multiple access or code division multiple access technology.



BSC: Connects to base transceiver station sites.



BTS: Base transceiver station for the PCS 1900 is a building that holds base station
transmitter and receivers and antenna tower. The tower has 9 antennas with one
transmitting antenna and two receiving antennas'.
Continues for 5 more pages >>




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