Case Communications syncro 1496, Reference Manual

Page: 155 / 192

The following rules apply to numbers entered on the blacklist.
i) After one unsuccessful connection attempt, ten seconds will elapse
before a second dial command for the same number can be executed.
ii) After a second unsuccessful connection attempt, 120 seconds will
elapse before a third dial for the same number can be executed.
iii) Another four attempts are allowed at 120 second intervals.
iv) Should all seven attempts to dial a number be unsuccessful, the
modem will be disabled from calling that number again until the
four-hour timer has elapsed.
v) Any attempt to redial the telephone number during a blacklisted
period will result in a
BLACKLIST
response.
Note: These rules do not apply to manual redialling on the PSTN (using
AT commands, or front panel buttons), nor to connections on leased lines.
When external Communication Software is used to control the modem,
automatic redialling must conform to the above rules and the requirements
of BABT/SITS/82/005S/D and BABT/SITS/82/01/C.
C.1.4 Restrictions on Use of S-Registers
S-registers 6, 7, 8 and 36 must always comply with the statutory
requirements listed below. Settings which do not conform are overridden
and the minimum or maximum setting is reverted to.
S-REGISTER MINIMUM VALUE MAXIMUM VALUE
S6 Wait for dialtone
S7 Wait for carrier
S8 Pause time for comma
S36 Max. No. of dial attempts
4 seconds
0 seconds
4 seconds
1 attempt
8 seconds
59 seconds
8 seconds
7 attempts
The use of multiple commas in a dialling string does not override the 8-
second statutory maximum in registers S6 and S8.
X450-310851 Issue 2 C-7 Rev.0