Counterpath eyeBeam 1.11 User Guide for Windows Manual do Utilizador descarregar pdf (Página 41)

7. If the result is could not find host, or request timeout, that computer is not available. Please

contact the appropriate VoIP service provider for assistance.

How to ping a computer (Mac OS X):

1. Launch the Network Utility found in the Applications/Utilities folder.

2. Click on Ping from the list at the top.

3. Enter the address of the computer and click Ping.

Firewall and NAT issues

If a user computer is behind a firewall, certain ports must be open for eyeBeam to be able to

communicate with a VoIP service provider. The required ports are listed below in Table 4. Please

refer to applicable firewall documentation for help on opening ports.

Table 4: Standard Ports

Two additional ports after 8001 are required for each additional line used. For example, if using a

second line, UDP ports 8002-3 are used.

If the user computer is behind a firewall from which it is impossible to open such ports, contact

the VoIP service provider regarding firewall traversal solutions such as X-Tunnels.

If the firewall restricts incoming connections, the user may need to use an Outbound Proxy to

properly receive audio. Ask the VoIP service provider for a Outbound Proxy address and port

number, then enter those values into eyeBeam in the following location:

Settings Menu -> Proxies -> [User’s SIP Proxy] -> <Outbound Proxy>:<Port>

Users must also set the Use Outbound Proxy field (found with the above setting) to Always.

Port forwarding is not required on a user’s NAT.

Port Type and Number Service

UDP 3478 STUN

UDP 5060 SIP

UDP 8000 RTP

UDP 8001 RTCP

1 2 ... 36 37 38 39 40 41 42 43 44

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Counterpath eyeBeam 1.11 User Guide for Windows Manual do Utilizador Página 41