Cisco SPA112 Administration Manual page 87

Configuring the Voice Settings
Line 1 and Line 2 Settings (PHONE Port1 and PHONE2)
Cisco SPA100Series Administration Guide
SIP Settings
Field
SIP Transport
SIP Port
SIP 100REL Enable
EXT SIP Port
Auth Resync-
Reboot
SIP Proxy-Require
SIP Remote-Party-
ID
Description
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
Port number of the SIP message listening and
transmission port.
Default setting: 5060
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
The external SIP port number.
Default setting: blank
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
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
To use the Remote-Party-ID header instead of the From
header, select yes. Otherwise, select no.
Default setting: yes
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