Cisco UC320W Administration Manual page 39

Ports and Trunks
SIP/BRI Trunks
Cisco Unified Communications UC320W Administration Guide
• SIP Domain Name: Enter the SIP domain name, if specified by your
provider.
• Authentication ID: If your provider requires SIP authentication, enter the
authentication code for your account. Typically this code is case sensitive.
• Password: If your provider requires SIP authentication, enter the password
for your account. Typically this password is case sensitive.
• SRV Record Lookup: If required by your provider, check this box to use
DNS SRV lookup for Proxy and Outbound Proxy, or leave this box
unchecked to disable SRV lookup.
• SRV Auto Prefix: If you enabled SRV Record Lookup, you can check this
box to automatically prepend the Proxy or Outbound Proxy name with
_sip._udp when performing a DNS SRV lookup on that name. Uncheck the
box not to use this service.
• Local SIP Port: Displays the local port number that is used for this service.
This information is for your reference, if needed.
• NAT Mapping: Check this box if NAT mapping is not provided by your SIP
provider and therefore local NAT mapping is required. Then specify the NAT
settings in the Systemwide SIP Parameters section. Note: Network
Address Translation (NAT) is a function that allows multiple devices on a
private network to share the same public, routable, IP address to establish
Internet connections. To enable VoIP to co-exist with NAT, some form of NAT
traversal is required. Some service providers provide NAT traversal, but
some do not. If you are unsure, check with your SIP provider.
• Send NAT Keep Alive: Check this box to allow the Cisco UC320W to
periodically send Keep Alive messages to the server to maintain the current
NAT mapping. Note: This option is available if you check the NAT Mapping
box.
Note: Other NAT settings are configured in the
section below.
Systemwide SIP Parameters
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