User Guide

R28A/V
Admin Guide
Register with user=phone: If enabled, the phone will send
user=phone within SIP message.
Anonymous Call: If enabled, R28 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 messages from
hacking.
4.2.6.Codec
Go to Account - Advanced to configure SIP call related codec.
Sip Account: To choose which account to configure.
Audio Codec: R28 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 4.2.6-1 SIP call related codec