Answering A Call For 1Tr6; Best-Effort Call Answering - ZyXEL Communications ACCESSING INTERNET & INTRANET omni series User Manual

multiple distinct terminals. Each of these "internal terminals" can be
assigned one ISDN number using the AT&ZIn=xxxx... command.
The number assigned by AT&ZIn=xxxx... can be interpreted as
either the MSN or the subaddress. This is determined by the bit 5 of
S119 as follows:
S119.5=0 - the number is treated as the MSN (default).
S119.5=1 - the number is treated as the subaddress.
The factory default for these numbers are unassigned. If an incoming
SETUP message is offered with addressing information (e.g. the
appropriate part of the called party number or the called party
subaddress), this address will be compared with the MSN/subaddress
numbers assigned by the AT&ZIn=xxxx... commands. The call will
be accepted using the specific protocol if the assigned number of this
protocol matches with the received called party number or called
party subaddress.
: Two phone number strings are said to be matched if their least
O
NOTE
significant "n" digit(s) are identical, where "n" is the number of
digits of the shorter string. Usually one digit is enough to
distinguish the various protocols.

Answering a Call for 1TR6

If an incoming SETUP message is offered with addressing
information (i.e. the destination address W-element). This address
will be compared with the EAZ numbers assigned by the AT&ZIn=m
commands. The call will be accepted using the specific protocol if the
assigned number of this protocol matches the received address.

Best-effort Call Answering

If some numbers have been set using &ZI command (as can be seen
by the AT&ZI? command) and they are not matched with the address
of the incoming call, the TA will, by default, ignore the call as it may
be intended for other devices that share the same S/T interface (S0
bus) with the TA.
86 Advanced ISDN Call Control