Disable Inbound Call Connection - ZyXEL Communications ACCESSING INTERNET & INTRANET omni series User Manual

[FM:[[Prefix]Calling-Party-Number][/Subaddress/]]
[TO:[Called-Party-Number][/Subaddress/]] <CR><LF>
RING <CR><LF>
RING <CR><LF>
......
The display of address information between the first RING and the
second RING can be disabled by setting ATS84.4=1. The term
[Prefix] is a predefined number string to be added in front of the
Calling-party-number before sending it to the DTE. This is useful for
some automatic dial-back-up systems. The number string can be
assigned as follows:
ATCI<Prefix> - When and only when the type-of-number
denotes an international number will this "Prefix" be added to the
Calling-party-number before indicating it to the DTE.
ATCI<> - Disables the international number prefix-adding
function. (Default)
ATCN<Prefix> - When and only when the type-of-number
denotes a national number will this "Prefix" be added to the
Calling-party-number before indicating it to the DTE.
ATCN<> - Disable the national number prefix-adding function.
(Default)
: The angle brackets '<' and '>' are part of this command.
O
NOTE

Disable inbound call connection

In some cases, the user may desire the TA to not answer any
incoming calls. This can be done by setting the bit 0 of S-register
S118:
S118.0=0 - Enable the TA to answer a call (by default).
S118.0=1 - Disable the TA to answer any call.
88 Advanced ISDN Call Control