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| Section 4
4.2.2 Telco
POTS Interface Settings
POTS Country
This setting configures the analog Telco line interface for proper impedance matching and other character-
istics for different countries. If your country is not listed, try using: CTR21 (European standard) or USA.
Caller ID alert signal
The behavior of “Default” is determined by the POTS Country setting. If “Default” does not work, ask your
telco what Caller ID alert signal they send.
Show ringing before Caller ID
Normally the ringing indication is passed to the VSet and other devices after the Caller ID has been received.
This delays the ring indication until after the second ring. You may want to have a faster ring indication, and
choosing “Yes” here lets you have it. But you risk losing the CID if an operator answers the call quickly. Some
lines don’t have CID and in this case this should be set to Yes since there is no reason to wait for the second
ring.
Hookflash duration
Adjusts the duration of the “hook flash” (loop current interruption) when the Transfer key is pressed. The
default value is 720 milliseconds. The following table indicates typical values for various countries:
USA
720 ms
Belgium, Netherlands, Switzerland
120 ms
France, Luxemburg, Portugal, Germany
270 ms
Rest of Europe
90 ms
The hook flash is sometimes used as a signal to initiate transfer or other features, with the specific effect
being dependent on the Telco or PBX capabilities and configuration.
CPC loop drop threshold (ms)
Sets the threshold time value for loop drop disconnect.
