Operation Manual

Getting Started
Feature Overview
Cisco SPA100 Series Administration Guide 5
1
You can keep the default settings or configure these tones in the Call Progress Tones
section of the Regional page.
• Call Progress Tone Pass Through
This feature allows the user to hear the call progress tones (such as ringing) that are
generated from the far-end network.
• Echo Cancellation
Impedance mismatch between the telephone and the IP Telephony gateway phone port
can lead to near-end echo. The ATA has a near-end echo canceller that compensates for
impedance mismatch. The ATA also implements an echo suppressor with Comfort
Noise Generator (CNG) so that any residual echo is not noticeable. This feature is
enabled by default. You can configure this setting in the Audio Configuration of the
Line 1 and Line 2 Settings (PHONE 1 and PHONE 2) page.
• Hook Flash Events
The ATA can signal hook flash events to the proxy during a connected call. This
feature can be used to provide advanced mid-call services with third-party-call control.
- Depending on the features that the service provider offers using third-party-call-
control, you may need to disable Call Waiting Service, Three Way Conference
Service, or Three Way Call Service to correctly signal a hook flash event to the
softswitch. You can configure these settings in the Supplementary Service
Subscription section of the Line 1 and Line 2 Settings (PHONE 1 and PHONE 2)
page.
- You can configure the length of time allowed for detection of a hook flash by
adjusting the Hook Flash Timer parameter in the Control Timer Values section of
the SIP page.
• Configurable Dial Plan with Interdigit Timers
The ATA has three configurable interdigit timers: an initial timeout signaling that a
phone is taken off hook, a long timeout signaling the end of a dialed string, and a short
timeout, signaling that more digits are expected. For more information, see
Configuring Dial Plans, page 138.
• Polarity Control
The ATA allows the polarity to be set when a call is connected and when a call is
disconnected. This feature is required to support some pay phone system and
answering machines. You can configure these settings in the FXS Port Polarity
Configuration section of the Line 1 and Line 2 Settings (PHONE 1 and PHONE 2)
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