How to Connect Asterisk to Siemens Hipath 3000 with HG1500 using a SIP Trunk

For outgoing calls.

Create a new SIP Trunk in Asterisk, with this PEER config:

type = peer
host = ip.of.hg.1500

Then add an outbound route. That's all. Calls using that outbound route should now pass through the Siemens Hipath.