Intel MD566X - Manual (Page 93)

56K V.92 Data, Fax, and Voice Chipset
Programmer’s Guide Intel Confidential 93
+VSD=m see ‘m’
Silence Detection (Quiet and Silence): This command allows the DTE to set
two parameters: reports the sensitivity for silence detection, and re-
ports the length of silence required for the DCE to report silence when receiving
voice.
The silence timer starts immediately after entering record mode. The
modem stops using the timer and starts using the timer if:
• the silence timer has timed out and a code has been sent to
the DTE, or
• if noise or voice energy has been detected above the silence detection threshold (as
defined by ).
m = ,
Defaults: m = 128, 50
Silence Sensitivity: If the received analog signal stays below this speci-
fied level for a user-specified time delay, the modem sends to the DTE.
The modem sends only one to the DTE each time record mode +VRX
is entered.
= 121–131
n = 128* Nominal level
Length of Silence: This parameter sets the period of silence that must
elapse before the DCE reports silence (as detected by “Quiet” or “Silence”).
= 0–255 (units of 0.1 second)
n = 0 Silence detection disabled
n = 50* Silence detection enabled
Table 6-1. Voice Mode Command Descriptions (Continued)