Anum/Bnum routing improvements

We’ve redesigned the A-number/B-number routing so it’s simpler and more flexible. Since IXC Softswitch 6.1.7, you don’t need separate “special” trunks or prefix-pair manipulation to apply different routes, perform A-number translations, or assign tariff plans by origin or destination country. Everything is now managed from one page in the main trunk settings - fewer objects to maintain, faster changes, and a cleaner topology.