ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

DPNSS 1-Specific Supplementary ServicesDPNSS 1-Specific Supplementary ServicesThe Omvia Media Server supports Sections 0 through Section 6 (simpletelephone call) of British Telecom specification BTNR 188. In addition,it supports the supplementary services explained below:Executive Intrusion (BTNR 188 Section 10 Issue 5 December 1989)Executive Intrusion offers users of selected extensions whoencounter a busy condition the possibility of intruding on theestablished conversation. As an option, the intruding party maywithdraw from the intrusion without clearing down.Three-Party Service–Transfer After Inquiry Using a New Path (BTNR188 Section 13 Issue 4 December 1993)The Three-Party Supplementary Service permits the Omvia MediaServer to make a call to a third party while holding an existing calland connects the other two parties within the end PBX. It thenreleases the two channels to the Omvia Media Server which in effecttransfers the call. The Hold Supplementary Service (BTNR 188Section 12) as well as the Route Optimization SupplementaryService (BTNR 188 Section 19) are used in conjunction with thisservice.Non-Specified Information (BTNR 188 Section 15 Issue 4 December1989)The Non-Specified Information (NSI) supplementary servicepermits a network to exploit the DPNSS 1 signaling scheme toimplement network-dependent features and functions.Some PBX vendors provide control of Message Waiting Indicator(MWI) lights for Voice Messaging Systems (VMS) using thisservice. Intervoice’s implementation of DPNSS 1 defaults to theNortel DMS 100 E format and allows the application the ability toturn the MWI lights on and off. The customer can configure thisfeature in the intvconf.dat file.Route Optimization (BTNR 188 Section 19 Issue 4 December 1989)The Route Optimization supplementary service offers the option ofobtaining a new connection between two end PBXs using thepreferred route when an established call does not follow theoptimum route between the two end PBXs.60001262, First Edition DPNSS 1 Protocol 6-5