Voice Parameters
Provisioning Guide for Cisco SPA100 and SPA200 Series Analog Telephone Adapters 127
6
<Min_CPC_Duration_3_> Specify the minimum duration of a low tip-and-ring voltage
(below 1V) for the Gateway to recognize it as a CPC signal or
PSTN line removal.
Default setting: 0.2
<Detect_Disconnect_Tone_3_> Choose yes to enable or choose no to disable this feature. If
enabled, the ATA will disconnect both call legs when it
detects the disconnect tone from the PSTN side during a
gateway call. Disconnect tone is specified in the
Disconnect
To n e
parameter, which depends on the region of the PSTN
service.
Default setting: yes
<Disconnect_Tone_3_> This value is the tone script which describes to the ATA the
tone to detect as a disconnect tone. The syntax follows a
standard Tone Script with some restrictions. Default value is
standard US reorder (fast busy) tone, for 4 seconds.
Default setting: 480@-30,620@-30;4(.25/.25/1+2)
Restrictions:
• Two frequency components must be given. If single
frequency is desired, the same frequency is used for
both
• The tone level value is not used. –30 (dBm) should be
used for now.
• Only 1 segment set is allowed
• Total duration of the segment set is interpreted as the
minimum duration of the tone to trigger detection
• 6 segments of on/off time (seconds) can be specified.
A 10% margin is used to validated cadence
characteristics of the tone.
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