100 / Remote system accessModular ICS 7.1 Installer Guide N0130943 02Remote access on loop start and E&M trunksLoop start trunks provide remote access to Norstar from thepublic network. E&M trunks provide remote access from aprivate network. Each must be configured to be auto-answer toprovide remote system access.A loop start trunk must have disconnect supervision if it is tooperate in auto-answer mode. E&M trunks always operate indisconnect supervised mode.When a caller dials into the system on a line that has auto-answer, the system answers with system dial tone and no COSpassword is required. In this case, control over the systemcapabilities available to the caller is provided only by therestriction filters assigned to the line.When a caller dials in on a line that has auto-answer withDISA, the system answers with stuttered dial tone. This is theprompt to enter a COS password. The password used by thecaller determines which system capabilities are available tothe caller.Remote access on a private networkNodes on the private network deliver the last dialed digits tothe destination Norstar node, for interpretation by thedestination Norstar node. The destination Norstar node eithermatches the digits to a target line or interprets the digits as aremote feature request. The call is either routed to the specifiedtarget line, or the remote feature is activated.By default, E&M trunks are set to answer with DISA. Forauto-answer E&M trunks connected to a private network,change the default so that the trunks are not answered withDISA. If an auto-answer E&M trunk is configured to answerwith DISA, the system tries to interpret any received digits asa COS password.
