Operating instructions
TransTel Model TD-824-I Digital Telephone System - General Description - Installation - Programming Forms Manual
Page 148 Version 1.3b October 2005
Includes all versions through G1-a20x
2. Local Toll (7 digit)
Some localities (a good example is the state of Maine, in the northeastern U.S.) allows 7 digit dialing to the entire
state, even though some calls are billed at toll rates. So a caller ID report from a telephone in the state of Maine to
another telephone in the state of Maine will show 207 234 5678. However if a caller ID machine is going to provide
redial capabilities, it must remove the area code 207 and dial only 234 5678.
For example: If I receive a call from the company across the state, my caller ID unit will display 207-234-5678. In
order to redial the call, I must dial 234 + 5678.
In this example , set Program 84-01-01 with a value of 207 (Home Area Code). You will also set Program 86-
200 through 86-999 to a value of 0. With this programming, whenever a number begins with the area code 207
the redial function will only dial the office code and subscriber number (7 digits).
Note: The default database already has 86-200 through 86-999 set to 0.
3. Local Call (10 digit)
Some larger cities in the United States have exhausted an entire area code. Miami, Florida is a good example of
this. Instead of separating portions of Miami and assigning unique area codes to different geographic regions, the
telco has instead introduced an ”overlay” area code. There are two area codes that cover the same geographic
area. In this situation, all local calls must dial NXX-NXX-XXXX for all local calls.
For example: I receive a call from the business next door. My caller ID unit displays 305-471-9091. To redial the
number I dial 305 + 471 + 9091.
This situation requires that you set Program 85-01-01 to a value of 305. The TD-824i supports up to a total of 5
“overlay” codes, so other overlay codes will be programmed on 85-02-01, 85-03-01, 85-04-01 and 85-05-01.
When calls are received from within your overlay area, the TD-824i will redial the call using all 10 digits received
from the telephone company, Area Code – Office Code – Subscriber Number as listed in the example paragraph,
above.
4. Local Toll (1 + 7 digit)
Within a large part of North America area codes cover a large amount of land. In these situations, a call within your
own area code will require that you dial 1 + the rightmost 7 digits of the telephone number. So if we used this for
calls within the 561 area code (our area code in Jupiter), other callers that are beyond the range of a local call
would dial 1 + 747-4466 to call TransTel. In this situation the caller ID would have to strip off the area code.
This requires the use of some kind of table, because a basic caller ID box would not know which office codes within
the 561 area code are local (7 digits only) and which are local toll (1 + 7 digits). In order to make this operate
properly we must provide the caller ID box with a list of all office codes that are local or a list of all office codes that
are not local. This allows the Caller ID box to determine which office codes need to be dialed with only 7 digits and
which need to use 1 + 7 digits.
For Example: If I get a call from another caller within my area code, but not a local call, I will see a display on my
Caller ID unit of 561-344-5678. To redial that call, we need to send the digits
1 + 344 + 5678
To make this example operate, set Program 84-01-01 to the value 561 (home area code). Then, on
Program 86-nxx you will enter the office codes that are in your area code and are reached by dialing 1+ 7
digits with a value of 1:
86-221 = 1 86-222 = 1 86-223 = 1 86-224 = 1 86-225 = 1 86-226=1
86-227 = 1 86-228 = 1 86-229 = 1 86-220 = 1
86-321 = 1 86-344 = 1 86-348 = 1 86-349 = 1
86-440 = 1 86-441 = 1 86-442 = 1 86-443 = 1 86-444 = 1 86-445 = 1
When these values are set as shown, each call received from 561-and any of the office codes will result in
calls being redialed using 1+ Office Code + Subscriber Line. (1+221-1234, 1+222=1234…).