Annex B
– Use of data signal detection and silence insertion in voiceband data
B.1 Introduction
B.2 Guideline for use of
DSD
B.3 Negotiation of the DSD capability with SDP
B.4 Negotiation of the DSD capability with H.245
Annex C – Use of V.21 preamble for
echo canceller control in a V.152 Gateway