Talkswitch CT.TS005.001101.UK - Manual (Page 144)

1 3 6 T A L K S W I T C H U S E R G U I D E • U K & I R E L A N D
Problem: When I call someone or they call me, voice is only heard in one
direction
• The cause of this problem is usually a result of a router being
misconfigured with respect to port mappings. Ensure all required VoIP
ports are mapped to your TalkSwitch unit. Also, ensure you use a static
private IP address when connected to your router as this can also affect
port mappings from the firewall/router.
For more VoIP information, see Chapter 5: VoIP Information.