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SIP Operation Manual
Caller ID
FXS Caller ID Generation: Select this option to enable the caller ID display function on
FXS ports. When enabled, the caller’s phone number will be displayed on your phone set
when the call comes through. FSK is preferred in some countries.
FXO Caller ID Detection: It is to detect Caller ID delivered from PSTN to the FXO port.
Detection Level: It is the gain volume that could be adjusted while detecting Caller ID.
NOTE: You have to enable “Wait for Caller ID before FXO / Trunk pick up” to ensure Caller ID is detected
correctly.
FSK Caller ID Type: Bellcore is preferred in North America and ETSI is in Europe.
Anonymous Caller ID (CLIR): When enabled, anyone receiving a call from you will not
display your number if the have caller ID.
NOTE: If you register the gateway to a Proxy and you check this options, you may be unable to make a
call. This is due to the fact that the VoIP gateway doesn’t send the number for authorization.
CLIP At Transit in W/O Caller ID: When disabled, if the FXO detects Caller ID in a call
from PSTN, the gateway will use the detected Caller ID as caller identification when it
makes transit in calls; if FXO cannot detect Caller ID in a call from PSTN, the gateway will
use “anonymous” as caller identification for transit in calls. When it enabled, the gateway
will always use “anonymous” as caller identification for transit in calls.
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