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3.5.5 Setting telephone numbers
When dial on demand is required, the modem uses the first telephone number value
from the command block to determine the number to dial. If this value is in the range
of 1 to 9 a speed-dial number is selected. If the value is in the range A to D (hex) then
the modem will read a block of registers from the PLC, then dial the returned value.
b15
D(x+1)
Tel. No.#1
Where (x+1) = Command Block address +1
1-9h
for Speed Dial addresses
A-Dh for Directory addresses
0h for NO telephone number
Telephone addresses are stored in HEX and must include all 4 numbers, e.g. 2300 not
23, [call telephone number in speed-dial address 2, then 3 if 2 is busy, etc.]
1)
Setting speed-dial numbers in the modem
These numbers are stored within the modem, so must be pre-set by connecting
the modem to a PC terminal, and using the command:
Where n is the speed-dial address in the range of 1 to 9
<telephone number> may be 15 characters long
Example 3-5 Setting Speed-Dial numbers
AT&Z3=01234567890 [Tel. No. 01234 567890 set at address 3]
When a value of 1 to 9 is found in the data returned from the PLC the
corresponding number is looked up then dialled.
2)
Setting directory numbers in the PLC
The start addresses of the four possible PLC locations (A-D) are included in
the command block and returned with each poll request. A block of five
registers is read from the start address indicated in the command block. Each
register holds up to four (hex) digits of the phone number, therefore the
number can be twenty digits long.
Entering a value of F (hex) indicates the end of the telephone number.
Example 3-6 Directory Dialling (PLC programming)
Command Block address D1000 and Directory Telephone No. in D405-409.
Tel. No. #2
Tel. No. #3
AT&Zn = <telephone number>
MOVP D405 D1003
MOVP HA000 D1001
MOVP K1
19
b0
Tel. No. #4 Telephone No. address
Set Directory A header address
Set Telephone address A
D1000
Set Dial Request bit 0=1
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