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: <sds> reports the sensitivity for silence detection, and <sdi> re-
ports the length of silence required for the DCE to report silence when receiving
voice.
The <DLE><s> silence timer starts immediately after entering record mode. The
modem stops using the <DLE><s> timer and starts using the <DLE><q> timer if:
• the <DLE><s> silence timer has timed out and a <DLE><s> code has been sent to
the DTE, or
• if noise or voice energy has been detected above the silence detection threshold (as
defined by <sds>).
m = <sds>, <sdi>
Defaults: m = 128, 50
<sds> Silence Sensitivity: If the received analog signal stays below this speci-
fied level for a user-specified time delay, the modem sends <DLE><q> to the DTE.
The modem sends only one <DLE><q> to the DTE each time record mode +VRX
is entered.
<sds> = 121–131
n = 128* Nominal level
<sdi> Length of Silence: This parameter sets the period of silence that must
elapse before the DCE reports silence (as detected by “Quiet” or “Silence”).
<sdi> = 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)