10.58.4. Service Information 
- An operational PABX is required, i.e. an S0/S2 trunk and tie line (CorNet-NQ) must be configured and 1operational. Basic internal traffic capabilities, including consultation and external consultation calls via S0/S2, must be configured and likewise operational.
- S0/S2 B channel transfer (first connection is talk state) must be configured and operational.
- Only XFBADIAL or XFBACALL may be set in the AMO FEASU.
- For subscriber-specific release please refer to Chapter 130, "On Hook Transfer per User or a Group of Users".