The HiPath 3800 often utilizes the to facilitate VoIP. Programming this requires a separate web interface (Java-based) where you manage: IP networking (CorNet IP) between multiple HiPath offices.
ADD-ZU: FE=1, ZU=1, TYP=ATM8, ASUB=1000; siemens hipath 3800 programming manual
This is where the manual becomes mission-critical. Programming trunks (PRI, BRI, or SIP) requires understanding "Route Lists" and "Trunk Groups." The HiPath 3800 often utilizes the to facilitate VoIP
Master Guide: Siemens HiPath 3800 Programming & Configuration siemens hipath 3800 programming manual
CHANGE-STATION:1001,FORWARD_NO_ANSWER=1000 (forward to 1000 on no answer)