A one-way talk path is a unidirectional voice audio path from one IP telephone to another, that is only one party on a call can hear the other. No-way talk path is the problem where neither party can hear the other, but the call is still connected. Talk path issues often relate to network connectivity issues. Both telephones might have a path to the media module, but might not have a route to each other or might be blocked by a firewall. Also, talk-path problems could indicate a shortage of DSP resources on the media module. Disabling shuffling is a good way to help diagnose talk-path problems (see also
Shuffling and hairpinning). Three possible problem locations can be identified if users report a one-way or no-way talk path between IP Telephones:
