System information

960 Stewart Drive Sunnyvale, CA 94085 USA Phone [phone] +1.877.80SHORE Fax [phone] www.ShoreTel.com
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Set the “Codec Group” selection parameters as needed and click on the “Apply” radio button. Then click
the Apply button at the bottom of the page.
Configuration of Loopback Interface
What differentiates this solution over previous methods for SIP connection is that this solution provides
the highest level of security available for ShoreTel customers wanting to use SIP trunks with ShoreTel
over the public Internet.
To that end, the solution requires the configuration of a VPN tunnel from the NetVanta device to the
EtherSpeak edge.
Physical Connections required:
1. Ethernet 0/1 needs to be plugged into the customer router and the customer needs to
provide an available public IP address
2. Ethernet 0/0 is disabled to ensure the highest level of security. At the customer‟s option,
this interface may be enabled for LAN access to the NetVanta router
3. PRI port is connected to ShoreTel PRI switch (e.g. 220T1) with a T1 cross-over cable