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ATA Voice Field Reference
Trunk Group page (SPA8000)
ATA Administration Guide
Voice tab > Trunk Group page >
Line Enable section
Line Enable
Voice tab > Trunk Group page >
Network Settings section
SIP ToS/DiffServ
Value
SIP CoS Value [0-7] CoS value for SIP messages.
Voice tab > Trunk Group page >
SIP Settings section
SIP Transport
To enable this line for service, select yes. Otherwise, select
no.
The default is yes.
TOS/DiffServ field value in UDP IP packets carrying a SIP
message.
The default is 0x68.
The default is 3.
The TCP choice provides "guaranteed delivery", which
assures that lost packets are retransmitted. TCP also
guarantees that the SIP packages are received in the same
order that they were sent. As a result, TCP overcomes the
main disadvantages of UDP. In addition, for security
reasons, most corporate firewalls block UDP ports. With
TCP, new ports do not need to be opened or packets
dropped, because TCP is already in use for basic activities
such as Internet browsing or e-commerce. Options are:
UDP, TCP, TLS. The default is UDP.
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