User's Manual

71
Regulatory Compliance and Safety Information
Echo cancellation
Echo cancellers are not normally required in the Telecom PSTN because
geographic delays are acceptable where CPE return loss is maintained within
Telepermit limits. However, those private networks making use of
Voice-over-IP (VoIP) technology are required to provide echo cancellation
for all voice calls. The combined effect of audio/VoIP conversion delay and
IP routing delay can cause the echo cancellation time of 64 mS to be required.
Compliance Statement for Taiwan
This section contains the compliance statement for Taiwan.