VOPtel GoIP4 Manual do Utilizador descarregar pdf (Página 24)

VOPTech Document Four Channel’s GSM VoIP Gateway

A） Signaling Port (SIP Local port)

The default SIP port is 5060. Change this as required.

B） NAT Keep-alive

The NAT Keep-alive feature sends a null packet to the SIP Proxy periodically in order

to keep the NAT open for incoming data traffics.

C） Advanced Timing Settings

Some SIP proxies may have special timing requirements. Change these parameters as

required.

D） Signaling Qos

Signaling QoS improves the performance of SIP signaling. If local network device

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VOPtel GoIP4 Manual do Utilizador Página 24