SIP Trunk or Registration

Asterisk Asterisk Support
1

I am wondering what are pros and cons for interconnecting two IP PBX Asterisks.

Until now i found two methods

  1. Using SIP trunk on every IP PBX

  2. Registration as clinet with line of register string per number
    register => user[:secret[]]@host[:port][/extension]

is it possible to use wildcards with registration?

Can anyone pls point out differences and obstacles for every solution?

2

They’re both “SIP Trunks”, although “SIP Trunk” is not actually an Asterisk concept, it is an Asterisk GUI one.

I would say, if you know the IP addresses, configuring as peers, rather than friends, is the tidier solution.