1.11.9 Parallelled TelephoneDescriptionMultiple telephones can be connected to the same port. This is useful to increase the number of telephoneswithout additional extension cards. The combinations and features of the parallelled telephones are describedbelow.Features Descriptions ConnectionsParallel Mode Parallel mode involves the connection of an SLT toan APT or a DPT that is connected to a SuperHybrid port.When parallel mode is enabled, the two telephonesfunction as follows:• Both share the extension number of thetelephone connected directly to the PBX (maintelephone).• Either telephone can make or answer a call.APT/DPT + SLTPBX SLTDPTExtn. 101 Extn. 101APT Extn. 102Extn. 102SLTEXtra Device Port(XDP) ModeXDP mode involves the connection of an SLT to aDPT that is connected to a Super Hybrid port.Unlike parallel mode, each telephone can act as acompletely different extension with its ownextension number. (® 2.1.1 Extension PortConfiguration)DPT + SLTPBXSLTDPTExtn. 101 Extn. 105Digital XDP Digital XDP involves the connection of a DPT to aDPT that is connected to a DPT port or Super Hybridport. The DPT that is connected directly to the PBXis called the "master DPT", and the DPT connectedto the master DPT is called the "slave DPT".Like XDP mode, each telephone can act as acompletely different extension with its ownextension number.If a master DPT is connected to the PBX by a SuperHybrid port (not a DPT port), a third telephone (SLT)can also be in parallel or XDP mode with the masterDPT.Digital XDP connection allows the number of DPTsthat the PBX supports to increase.PBXDPT + DPTDPTExtn. 101 Extn. 201DPTMaster SlavePBXDPTExtn. 101 Extn. 201SLTExtn. 101 (in Parallel Mode)orExtn. 105 (in XDP Mode)DPTMaster SlaveDPT + DPT + SLTFeature Guide 1651.11.9 Parallelled Telephone
