User manual

Example 1: Public Switched Telephone Network (PSTN) Calling/Answering
Applications:
VS211 is default at the VoIP mode. For PSTN calls, you may just pick up the phone, press
0 * key, and dial directly to the PSTN number like a normal telephone.
Configurations:
1. Select “ON” for the “Auto Answer” in Call settings.
2. Select a value for Auto Answer Ring Counter, and the default value is set at 3.
3. Click the “Submit” button.
Calling/Answering
4. Pick up the phone and press 0 * key for PSTN mode, and you should hear a dial tone.
5. Press, e.g. 1234567, to call the PSTN party with 1234567. In a moment, you should hear
a ring back tone, and wait for the called PSTN party to answer.
6. When receiving PSTN incoming call, you must pick up the phone within 4 rings to answer,
otherwise the VoIP mode will answer automatically for IP extension call. Please refer to
Example 5 for more details of PSTN to SIP extension calls.
7. If the “Auto Answer” is OFF, the FXO port will become PSTN only, and the function of
extension call from PSTN to SIP call will be disabled.
Example 2: SIP-to-SIP Calling/Answering
Applications:
The applications can be for ADSL connections as in either Diagrams A or B . Both parties are
registered to SIP server with private IP under NAT router. The SIP-to-SIP calling works when both
calling and answering parties are registered to SIP server with given registered phone numbers. For
Diagram A without NAT router, you may select NAT mode to enable the embedded NAT router. For
Diagram B with external NAT router, you may select Bridge mode to disable the embedded NAT.
Please refer to Example 11 for more detailed SIP server registrations.
Configurations:
1. Select either “NAT“ or “Bridge” in accord with your network in “WAN settings” page,
2. Select “DHCP Client” to automatically get an IP address from NAT router.
3. Remember to click the “Submit” button,
4. Select Active “ON” in the “SIP settings / Service Domain” page,
5. Enter the items of Register Name, Register Password, Proxy Server, and Outbound Proxy,
6. Select “ON” in the “STUN setting”, if Outbound Proxy is NOT available.
7. Upon successful SIP registration, the PHONE LED will start Green flashing.
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