VTech ET685 Administrator And Provisioning Manual page 126

Setting
Support broken Registrar
Shared Line
Publish Presence on
bootup
DTMF via SIP INFO
Send display name on
INVITE
Web User Interface (WebUI) Reference
ET685 Administrator and Provisioning Manual
Description
If your VoIP provider works only when you turn on 'Support
broken registrar' on the phone's web interface, this means
your provider does not call your phone the way the phone
requested to be called. What happens is that incoming
INVITEs from your VoIP provider do not contain the contact
URI which was previously registered by your phone as its
contact. Thus the phone cannot safely identify the target line
of the incoming call. When you compare the URI in the first
line of the incoming INVITE and the URI in the Contact of the
REGISTER, which the phone sends to the registrar of your
provider, they will presumably differ. This is what we mean
by 'broken registrar'. It is as though your provider has sent a
letter to an apartment building with the city, the street
address, and the house number on it, but without the
recipient's name. When you turn on 'Support broken
registrar', the phone tries to find the right apartment by
guessing, but this guessing will fail when there are two
parties with the same name in the building.
If you have to share your extension (identity) with somebody
else, this has to be enabled.
When this feature is set to "on", the phone publishes the last
presence state on bootup.
Some IVR systems may need DTMF events signalled via
SIP INFO messages, this can be enabled here. Set it to
<on> or <sip_info_only> to provide DTMF codes via SIP
INFO messages. With <sip_info_only> the in band and out
of band DTMF codes stop going in RTP as they are sent
only through SIP INFO messages. Initially <on> was
sending DTMF codes via SIP INFO messages only. This
behaviour is now taken over in version 7.1.33 by the new
option <sip_info_only> and <on> is additionally sending
DTMF via RTP!
When this option is enabled, the phone receiving a SIP
INVITE message adds the 'display name' of the called
identity to the reply message in order to allow the calling
party to show this information on its display.
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