Cisco Systems 186 Comfort Noise During Silence Period When Using G.711, Debugging Diagnostics

Chapter 4 Basic and Additional SIP Services

Additional SIP Services

Comfort Noise During Silence Period When Using G.711

When silence suppression is turned on in ITU G.711, the Cisco ATA calculates and transmits its noise level to the far end to enable the remote endpoint to generate the appropriate amount of comfort noise. This provides the remote user with a similar experience to that of a PSTN call and prevents silent gaps when neither party is talking.

Related Parameter

AudioMode, page 5-20—Bit 0 disables/enables silence suppression.

Configurable Hook Flash Timing

This feature provides the ability to adjust the hook-flash timing to meet local requirements.

Related Parameter

SigTimer, page 5-32—Bits 26 and 27 are for configuring the minimum on-hook time required for a hook flash event, and bits 28 through 31 are for configuring maximum on-hook time.

Configurable Mixing of Call Waiting Tone and Audio

This feature allows the call-waiting tone to be mixed with the audio in an active call. Therefore, the call-waiting tone will sound without a pause in the audio.

Related Parameter

ConnectMode, page 5-28—Bit 24

Configurable On-hook delay

This feature is available only for the recipient (callee) of a call. If the callee picks up the phone and then later hangs up to retrieve another call, the hang-up is not considered on-hook until the specified delay expires.

Related Parameter

FeatureTimer, page 5-26—Bits 8 to 12

Debugging Diagnostics

You can use the following parameters to troubleshoot operation issues:

•NPrintf, page 5-36—Specify the IP address and port where debug information is sent.

•TraceFlags, page 5-36—Use to turn on specific trace features.

Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide (SIP)

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