TelcoDP Metering Software Install Windows Desktop application: Download and run the installer from http://dl.ip6link.com. If you don’t have a login please contact support. Run as a Windows Service: Download and install the AlwaysUp utility from https://www.coretechnologies.com/products/AlwaysUp/. Add the application C:\ip\PrilinkNM.exe to AlwaysUp to run as a service. PRI Meter Installation and User Guide (PDF, 1.31 MB). IP Address Assignment (PDF, 53.5 KB). ITU-T Recommendation Q.931: ISDN user-network interface layer 3 specification for basic call control. SIP Meter Contact Prilink Support at firstname.lastname@example.org Installation Diagram. IP Address Assignment (PDF, 211 KB). RFC 3261: SIP 2.0 specification. RFC 4566: SDP (Session Description Protocol) specification.