Anonymous Call: If enabled, E21A/V will block its information
when calling out.
Anonymous Call Rejection: If enabled, calls who block their
information will be screened out.
Missed Call Log: If enabled, any missed call will be recorded into
call log.
Prevent Hacking: If enabled, it will prevent SIP message from
hacking.
Go to Account - Advanced to configure SIP call related codec.
Sip Account: To choose which account to configure.
Audio Codec: E21A/V support four audio codecs: PCMA, PCMU,
G729, G722. Different audio codecs require different bandwidth,
users can enable/disable them according to different network
environment.
Note: Bandwidth consumption and sample rates are as below:
Figure 4.2.4-1 SIP call related codec
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