Configuring the Voice Settings
Line1 and Line 2 Settings (PHONE Port1 and PHONE2)
Cisco SPA100Series Administration Guide 86
4
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.
O p t i o n s a r e : U D P, T C P, T L S .
Default setting: UDP
SIP Port Port number of the SIP message listening and
transmission port.
Default setting: 5060
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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