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11.3
Call-lists
The modem may store maximum 20 numbers in phone register by
use of the command &Zn. nis the number in the register (0-19). The
phone register is basis of the 3 Call-lists. A Call-list is a subset of
telephone numbers from the phone register . A Call-list is used by the
modem to dial one or more numbers until it reaches a connection to
another modem.
Associated to each Call-list there are two important parameters.
1. Index to the first telephone number in the dictionary to be dialled .
This parameter is stored in a S-register and can take values in the
range 0 to 19. Each Call-list has a S-register for this purpose. If the
modem fails to connect (BUSY, NO CARRIER) it will dial the next
number in the dictionary until the Call-list is empty. S-register +S25
determines how many times each number shall be tried before the
modem advances to next index in the dictionary.
2. Index to the last number to be dialled.
Each Call-list has a S-register for this purpose. The Call-list is empty
when the modem fails to connect using this index.
The Call-lists will be used by separate functions:
List 1 is used when activating the VOICE/DATA switch and by calls
originated by 108.1 (see +E1 command)
Call-list 1 uses +S35 (first)/+S36 (last) as index registers.
List 2 is used by automatic dial backup initiated by loss of carrier on
leased line connections.
Call-list 2 uses +37 (first)/+S38 (last) as index registers.
List 3 is used by automatic dial backup initiated by data inactivity.
Call-list 3 uses +S39 (first)/+S40 (last) as index registers.
The following example shows how the Call-lists may be organised.
The figure illustrates the phone register.
LZTR104006 R1.00
11-11
Zat 14.4/14.4-7 and 19.2/19.2-7
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