Page 1134 of 1814 ISDN Semi Permanent Connections for Australia553-2901-301 Standard 9.00 January 2002ISPC links are established by the Australian Central Office (CO) as a 64kbpscleared data link.The CO and Meridian 1 PBXs do not provide a mechanismfor echo cancellation for ISL calls using ISPC links.The Phantom DTI2 trunks used by this feature must belong to the same groupas the real PRI2 trunk.When establishing an ISL D-channel between two Meridian 1 PBXs, thefollowing hardware is required:• D-channel (DCH), Dual Density D-channel (DDCHI) or Multi-SerialData Link (MSDL) card on each Meridian 1 site;• Meridian Communication Unit (MCU) or Meridian CommunicationAdapter (MCA) on each site for the exchange of D-channel signalingbetween sites; and• Tone Detector Card (XTD or DTD) on one site and a Tone GenerationCard (XCT or TDS) at the other site in situations where at least one ISPClink is used to convey D-channel signaling.Feature interactionsAttendant Barge-InWhen an attendant attempts to Barge-In on 2.0 Mbps Primary Rate InterfaceB-channel used as an ISPC link with the Central Office, a fast busy tone isprovided.Attendant Incoming Call IndicatorsCalls using an ISPC link are always presented as calls over TIE trunks.Call Detail RecordingCalls using an established ISPC link are identified by the calling party, calledparty, time and duration of call. Call Detail Recording tickets are notgenerated for the ISPC links that have been established.Call Forward by Call TypeISPC calls are handled according to the configuration of the route associatedto the phantom trunk TN. This configuration is independent of the routeassociated to the real TN.
