Trunk Optimization (Before Answer) Page 1627 of 1814International ISDN PRI Feature description and administrationFeature interactionsWith the exception of those discussed here, call redirection features are notaffected or supported.Attendant callsAttendant extended calls can allow or restrict TRO-BA as shown in thefollowing:• Telephone A, a DID trunk, or an incoming trunk calls the attendant, andthe attendant extends the call to Telephone B, which has NCFAC,NHUNT to Telephone C. The call is optimized to Telephone C.• A DID trunk, or an incoming trunk call to the attendant is extended toTelephone B, and the attendant does not release the call. Telephone B hasNCFNA to Telephone C. After three rings, the call forwards toTelephone C, and the attendant releases the call. The call is optimized toTelephone C.BARS/NARSBARS/NARS operation is not changed. BARS/NARS is used to determineroute availability to terminate the optimized call. Only Uniform Dialing Plan(UDP) and Coordinated Dialing Plan (CDP) are supported by TRO-BA.Direct Trunk Access Codes are not supported.Call Party Name DisplayWhen a call is optimized, the name or number may not appear on thereceiving party’s display.Class of ServiceIt is important to program redirecting telephones with Class of Service (CLS)to allow call redirection.Dialed number displayCalls modified by Network Call Redirection and TRO-BA may affect thedisplay results on the answering telephone. The dialed number/name will notappear on the called telephone’s display, despite having it allowed.
