Cisco Small Business SPA2102 Administration Manual page 32

Introducing Cisco Small Business Analog Telephone Adapters
ATA Software Features
Cisco Small Business ATA Administration Guide
Feature
Calling Party
Control
Report Generation
and Event Logging
Syslog and Debug
Server Records
SIP Over TCP
Description
Calling Party Control (CPC) signals to the called party
equipment that the calling party has hung up during a
connected call by removing the voltage between the tip
and ring momentarily. This feature is useful for auto-
answer equipment, which then knows when to disengage.
CPC is configured in the Regional, Line, and PSTN Line
tabs. See "ATA Voice Field Reference," on page
The ATA device reports a variety of status and error
reports to assist service providers to diagnose problems
and evaluate the performance of their services. The
information can be queried by an authorized agent, using
HTTP with digested authentication, for instance. The
information may be organized as an XML page or HTML
page. Report Generation and Event Logging are
configured in the System, Line, and PSTN Line tabs. See
"ATA Voice Field Reference," on page
Syslog and Debug Sever Records log more details than
Report Generation and Event Logging. Using the
configuration parameters, the ATA device allows you to
select which type of activity/events should be logged.
Syslog and Debug Server allow the information captured
to be sent to a Syslog Server. Syslog and Debug Server
Records are configured in the System, Line, and PSTN
Line tabs. See "ATA Voice Field Reference," on
page 115.
To guarantee state-oriented communications, you can
choose TCP as the transport protocol for SIP. This protocol
is "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. SIP over TCP is configured in
the Line tabs. See "ATA Voice Field Reference," on
page 115.
This feature applies to SPA2102, SPA3102, and SPA8800.
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