Manual

19
- Under SIP Settings -
Provider Binding Port - This port is
assigned by EarShot IFB based on the
number of providers you have assigned.
Unless required, you should leave the
default setting as is.
Proxy Address - Most providers use the
same server address for incoming call
registration and proxying SIP traffic. If your
provider shows a different address for
proxy, enter it here.
Registration Proxy Address - Some
providers require REGISTER messages be
sent to a different server. If your provider
has specifically required this, enter the
address here.
From Username, From Domain - Not
applicable to EarShot IFB
Expire Time, Retry Time - These values
determine how long to wait (without any
communication) before the SIP provider
will consider the registration connection
lost, and once lost, how often to attempt to
reestablish. The default values are usually
best, unless strictly required to be changed
by your provider.
Register - If you would like to save SIP
provider entries for occasional use, you can
set them to be disabled here by setting
this value to “No”. No registration will be
attempted until this setting is changed from
“No” back to “Yes”.
Register Transport - Leave this
set to “UDP” in all but very unusual
circumstances.
INVITE SDP Compatibility - Optionally enable compatibility mode for SIP INVITE lacking SDP. This
setting is required by Cisco CUCM and 3Com NBX.
INVITE Contact Compatibility - Optionally force extension to be sent in Contact field of SIP
INVITE. This setting is required by 3Com NBX.
Force Ringback - Optionally generates a ringtone for late-offer calls that don’t ring.