ZyXEL Communications U-336SA - Manual (Page 72)

58 Special Functions
part (cadence) of the ring. Your modem can distinguish up to four types
of ring signals and can be commanded to answer or not answer any one
of these four types of ring signals. Following is a list of these four types
of ring signals. These are the ring types used in the USA. The difference
among the ring types is the two-second ON part of the ring signal. It
comprises a long, double short, or triple short ring.
S-register S40 bits 3-6 are used for distinctive ring control. Each bit
controls the answering of a particular ring type. Setting a bit to “1” (on)
enables answering, setting it to “0” (off) rejects the ring. Note that the
ring may still be heard even if it is not counted as an accepted ring by
the modem.
The control relationships between bits 3-6 in register S40 and the
different ring types are:
Type Bit (on) Ring Sequence
1 3 1.2s or 2s on; 4s off
2 4 0.8s on, 0.4s off, 0.8s on; 4s off
3 5 0.4s on, 0.2s off, 0.4s on, 0.2s off, 0.8s on; 4s off
4 6 0.3s on, 0.2s off, 1s on, 0.2s off, 0.3s on; 4s off
ON OTE
: I
F ALL OF THESE BITS ARE
"0" (
OFF
),
ANY RING WITH A DURATION LONGER
THAN 100 MS WILL BE ACCEPTED . U SE THIS DEFAULT IF YOU DO NOT HAVE
DISTINCTIVE RING SERVICE
.
If more than one type of Distinctive Ring is turned on, RING n will be
reported for an incoming ring signal where n is the ring type number.
ON
OTE
: C
OUNTRIES OTHER THAN THE
U.S.
MAY HAVE DIFFERENT SPECIFICATIONS
FOR DIFFERENT RING TYPES
. T
HE MANUFACTURER MAY APPEND OTHER SETS
OF RING TYPE SPECIFICATIONS TO SUIT EACH COUNTRY
'
S NEEDS
.