ZyXEL Communications U-336SA user manual Type Bit on Ring Sequence

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 3-6are 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

ONOTE: IF ALL OF THESE BITS ARE "0" (OFF), ANY RING WITH A DURATION LONGER THAN 100 MS WILL BE ACCEPTED. USE 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.

ONOTE: COUNTRIES OTHER THAN THE U.S. MAY HAVE DIFFERENT SPECIFICATIONS FOR DIFFERENT RING TYPES. THE MANUFACTURER MAY APPEND OTHER SETS OF RING TYPE SPECIFICATIONS TO SUIT EACH COUNTRY'S NEEDS.

58 Special Functions