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YML749Rev1 V100 User Guide
www.netcomm.com.au 33
Cannot get bi-directional conversation
Symptoms:
Register to a VoIP provider’s SIP server is successful.
You can make and receive calls. However, you cannot hear remote party’s voice or in some
situations both sides cannot hear each other.
Checkpoints:
■ If your V100 is behind a NAT/Firewall, call your VoIP provider to see whether you need
STUN support to traverse a NAT/Firewall.
■ Configure your STUN client using correct STUN server information (refer to the section on
STUN Tab for more information). Your VoIP provider might provide you this information.
Cannot receive any incoming calls
If you cannot receive any incoming calls, please make sure “UnConditional” call forwarding is
disabled. This function blocks all incoming calls and forwards them to the phone number you
specified in configuration.
No DTMF tone at remote site
If the remote site cannot properly get DTMF tones that are generated from your side, please try
different DTMF relay mode (in band or RFC 2833).