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Configuring the Voice Settings
Line 1 and Line 2 Settings (PHONE 1 and PHONE 2)
Cisco SPA100 Series Administration Guide 83
1
SIP Settings
Field Description
SIP Transport 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.
Default setting: UDP
SIP Port Port number of the SIP message listening and transmission port.
Default setting: 5060 for PHONE1 and 5061 for PHONE2
SIP 100REL Enable To enable the support of 100REL SIP extension for reliable
transmission of provisional responses (18x) and use of PRACK
requests, select yes. Otherwise, select no.
Default setting: no
EXT SIP Port The external SIP port number.
Default setting: blank
Auth Resync-Reboot If this feature is enabled, the ATA authenticates the sender when it
receives the NOTIFY resync reboot (RFC 2617) message. To use
this feature, select yes. Otherwise, select no.
Default setting: yes
SIP Proxy-Require The SIP proxy can support a specific extension or behavior when it
sees this header from the user agent. If this field is configured and
the proxy does not support it, it responds with the message,
unsupported. Enter the appropriate header in the field provided.
Default setting: blank
SIP Remote-Party-ID To use the Remote-Party-ID header instead of the From header,
select yes. Otherwise, select no.
Default setting: yes
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