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Failure response is
{sep}
;{call progress messages}...
r
where
is the recall count (1 < = r < = n ; 1, 2..., etc.), followed by a separator field
r
<etb><sy><sy><stx>
and call progress messages (CFI, etc.). If the call fails to connect, this is repeated for the specified number
of times.
8.4.9 L
N
INK
UMBER BY
This command links the number at address
decimal values. Linking numbers enables different numbers to be dialed if a call failure occurs.
Only forward linking to one other number is allowed, so address 1 can be linked to 4, then to 8, then to
9, and so on; however (using this example), if address 4 is dialed by a CRS command without connection,
it links forward to 8 then to 9.
If all these fail to connect, the autodialer will not back-link to address 1 unless circular linking is used.
Numbers may be linked as 4 to 5 to 3; however, if address 3 is dialed, back-linking to 5 is not allowed.
If circular linking (1 to 8 to 7 to 1) is used, dialing is discontinued after the addressed number in the
dial command has been dialed twice. If only one parameter follows the PRL command, the number at
address
is unlinked from its forward link.
a
For example, if the link list 4 to 8 to 3 to 7 to 9 to 1 exists and PRL 7 is received, 7 would be unlinked
from 9, but not from 3. This would result in two link lists: 4 to 8 to 3 to 7 and 9 to 1.
Responses:
VAL
Valid command received. Transmitted on receiving an error-free command with no
transmission error such as a parity error. This confirmation is sent before the command
is executed.
INVCU
Invalid command—command unknown.
Example: TRL 1;5
INVMS
Invalid command—message syntax error.
Examples:
PRL;1;5
PRL;
INVPS
Invalid command—parameter syntax error.
Examples:
PRL 1;5;
PRL 1;0;0
PRL 1;
PRL
PRL 001;5
A
(PRL
;
)
DDRESS
A
B
a
with the number at address
CHAPTER 8: V.25 bis Autodialer
. The addresses are one-digit
b
125
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