ABSD Billing
From Zenitel Wiki
ABSD = AlphaCom Billing Service Daemon
A AlphaCom can host a ABSD process for billing services. ABSD requires a license to be inserted, and the application it self runs from local flash filesystem. ABSD handle the realtime authorization and charging of outgoing calls. Configuration and invoicing is handled by a BillingWeb application.
The ABSD software communicates with the local AMCD using [| Stentofon Simple Link Layer]. The ABSD software is defined as device number 198, and connects to local AMCD on TCP port 127.0.0.1/40002. In AlphaNet, remote AlphaComs communicates with ABSD via the hosting AMCD using the normal AlphaNet routing.