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Getting Started
Feature Overview
Cisco SPA232D Administration Guide 11
1
FXS Port Polarity Configuration section of the Line1 Settings (PHONE
Port) page.
• Calling Party Control
Calling Party Control (CPC) signals to the called party equipment that the
calling party has hung up during a connected call by momentarily removing
the voltage between the tip and the ring. This feature is useful for
auto-answer equipment. You can configure these settings in the Control
Timer Values section of the Regional page.
• Event Logging
You can enable logging and select the relative priority of events to be
logged. The information can be sent to a Syslog Server. You can configure
the syslog and debug settings in the Miscellaneous Settings section of the
System page.
• Encryption of SIP messages using SIP over TLS
You can enable SIP over Transport Layer Security (TLS) to encrypt the SIP
messages between the service provider and the your business. SIP over
TLS relies on the widely-deployed and standardized TLS protocol to
encrypt the signaling messages. You can configure the SIP Transport
parameter in the SIP Settings section of these pages: Line 1 Settings
(PHONE Port), PSTN (LINE Port), and DECT Line 1 - DECT Line 10.
• Secure Calling using SRTP
Voice packets are encrypted by using Secure Real-Time Transport Protocol
(SRTP). This function is implemented on a standards basis (RFC4568).
Secure call service (Secure Call Serv) is enabled by default in the
Supplementary Service Subscription section of these pages: Line1
Settings (PHONE Port) and DECT Line 1 - DECT Line 10. When this
service is enabled, users can activate secure calling by pressing the star (*)
key before dialing a phone number. Alternatively, you can enable the Secure
Call Setting to encrypt all calls from a user’s phone or a DECT line. See the
Supplementary Service Settings section of the User 1 page and the DECT
Line 1 - DECT Line 10 page.