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13-4940-00251 Commend SIP Doorphone
Mitel Resiliency Configurations
Resiliency behavior tested as in Scenario 1, configure the parameter for Domain server as
shown in Figure 11.
In this example,
sipint4sipint2 is the FQDN name of the primary 192.168.101.11 SIP Proxy (3300 ICP) using DNS
SRV or A records to get the secondary 192.168.101.20 (i.e. Alternative) SIP proxy (3300 ICP).
NOTE: Before configuring this parameter, make sure that DNS server correctly resolves the
names of the SIP proxy to IP addresses! The order, in which the SIP proxies IP addresses are
resolved, is also important! To check it, use the command in command shell:
nslookup sipint4sipint2.sipcoe.mitel.com
Server: ad-sip-interop.sipcoe.mitel.com
Address: 192.168.101.200
Name: sipint4sipint2.sipcoe.mitel.com
Addresses: 192.168.101.11, 192.168.101.20
In this example, 192.168.101.11 is the IP address of primary SIP Proxy (3300 ICP) and
192.168.101.20 is the IP address of the secondary (i.e. Alternative) SIP proxy (3300 ICP).
NOTE: Although FQDNs could be set for the primary and secondary PBXs’ addresses, we
recommend using of IP addresses. The site’s DNS server can be inaccessible in case of the
network failure. That’s why, for better reliability, the use of IP addresses is more preferable.
Do not forget to click Apply to submit the settings to Commend doorphone to force the phone to
reset and load new settings.