Avaya 1692 IP Bedienungsanleitung PDF herunterladen (Seite 29)

1692 IP Conference Phone User’s Guide Nov 2009 29

Safety and Compliance (continued)

New Zealand Telepermit (continued)

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 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.

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Avaya 1692 IP Bedienungsanleitung Seite 29