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Voice Feature Guide 01

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A subscriber's phone rings, indicating that an incoming call is waiting on the line. The POTS board plays the ring tone to plain old telephone service (POTS) subscribers. This section describes the ring tone played by the POTS board.

Break-Make Ratio of the Ring Tone Played by the POTS Board

The break-make ratio varies depending on countries. For example, the break-make ratio in China is 1:4, that is, the ring tone is played in the cycle of one-second ringing followed by four-second mute. Figure 1-100 shows a six-segment ring with break-make ratio 0.4:0.2:0.4:0.2:0.4:2.6, which cycles in the following mode: ringing for 0.4 seconds and mute for 0.2 seconds twice followed by 0.4-second ringing and 2.6-second mute.
Figure 1-100 Ring example

In some countries, break-make ratio is different for different services. For example, break-make ratio 1:4 is used for local calls, 1:2 for toll calls, and 0.4:0.2:0.4:4 for intra-Centrex calls.

Updated: 2019-02-22

Document ID: EDOC1100067358

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