Speech path issues on Remote phones

If users are experiencing speech path issues on Remote phones, please check the following:

Remote SIP Phones

  1. Navigate to the SIP Settings page
  2. Verify your NAT Settings for your network.
  3. Navigate to Extensions page, scroll down to Device Options section.
  4. Ensure nat is set to Yes.

Remote XSTIM Phones

  1. Navigate to XSTIM Settings page, scroll down to Advanced General Settings section.
  2. Ensure the Public IP field is filled in with the public ip address of the router.

Port Forwarding

Typically, the UCx Server is deployed behind a router that implements NAT/PAT between the UCx server and the Internet. In order for the UCx system to properly establish voice path for calls in all possible scenarios, it is necessary to enable port forwarding of certain ports to the UCx server.  This is done on the router. The ports must be forwarded to the IP address of your UCx Server (by default 

Rule Name Port Number/Port Range Port Type Description
RTP (media) 10000 - 13999 UDP Required for remote SIP phones and remote Nortel phones.
SIP (signaling) 5060 or 5960 UDP Required for remote SIP phones. 5060 is the default,it is highly recommended that you use a non-default port. For UCX cloud systems the default is 5960. You can configure the port number under SIP Settings.
XSTIM (signaling) 7000 UDP Required for remote Nortel phones. 7000 is the default. You can configure the port number under XSTIM Settings.


If there is a firewall implemented on the network, the respective ports (see table in Port Forwarding section) need to be opened.

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one way
sip trunk
sip trunks
speech path
remote phones