AudioCodes Mediant 800B User Manual

Version 7.2 399 Mediant 800B Gateway & E-SBC
User's Manual 18. SIP Definitions
Parameter Description
Note: The parameter is applicable only if you have
enabled Account registration ('Register' parameter
configured to Regular or GIN).
Registrar Search Mode
registrar-search-mode
[Account_RegistrarSearchMode]
Defines the method for choosing an IP address (registrar)
in the Proxy Set (associated with the Serving IP Group) to
which the Account initially registers and performs
registration refreshes, when the Register Stickiness
feature is enabled. Once chosen, the
Account is binded to
the IP address for subsequent SIP requests.
 [0] Current Working Server = (Default) For each initial
and refresh registration request, the device routes to
the currently working server in the list of IP addresses
(configured or DNS-resolved IP addresses) in the
Proxy Set. In the case of proxy load-balancing, the
chosen IP address is according to the load-balancing
mechanism.
 [1] According to IMS Specifications = For the initial
registration request, the device performs DNS
resolution if the address of the Proxy Set is configured
as an FQDN. It then attempts to register to one of the
listed DNS-resolved addresses (or configured IP
addresses), starting with the first listed address and
then going down the list sequentially. If an address
results in an unsuccessful registration, the device
immediately tries the next address (without waiting any
retry timeout). The device goes through the list of
addresses until an address results in a successful
registration. If registration is unsuccessful for all
addresses, the device waits a configured retry time
and then goes through the list again. Once initial
registration is successful, periodic registration
refreshes are performed as usual. In addition to the
periodic refreshes, immediate register refreshes are
done upon the following triggers according to the IMS
specification:

The device receives a SIP 408, 480, or 403
response from the Serving IP Group in response
to an INVITE.

The transaction timeout expires for an INVITE
sent to the Serving IP Group.

The device receives an INVITE from the Serving
IP Group from an IP address other than the
address to which it is currently registered. In this
case, it also rejects the INVITE with a SIP 480
response.
If the device's physical Ethernet link to the proxy goes
down, the device re-registers this Account with the
proxy when the link comes up again. Re-registration
occurs even if proxy keep-alive is disabled.
Note: The parameter is applicable only if you have
enabled the Registrar Stickiness feature (in this table):
 'Register' parameter to Regular or GIN.
 'Registrar Stickiness' parameter to Enable.

AudioCodes Mediant 800B Specifications

General

Brand	AudioCodes
Model	Mediant 800B
Category	Gateway
Language	English