FeaturesFeatures Manual 54Class of Service Options (DISA Service), Program 20-14DefaultItemNo. Item InputData COS1 - 1501First Digit AbsorptionFor tie lines, enable or disable the ability to absorb (ignore) the first incomingdigit. Use this to make the tie trunk compatible with 3- and 4-digit tie lineservice. This option does not apply to DISA.0- Off1- On 002Trunk Group Routing/ARS AccessThis option enables or disables a DISA or tie trunk caller’s ability to dial 9 forTrunk Group Routing or Automatic Route Selection (ARS).0- Off1- On 003Trunk Group AccessThis option enables or disables a DISA or tie trunk caller’s ability to accesstrunk groups for outside calls (Service Code 814).0- Off1- On 004Common Abbreviated DiallingThis option enables or disables a DISA or tie trunk caller’s ability to use thesystem’s Common Abbreviated Dialling.0- Off1- On 005Operator CallingThis option enables or disables a DISA or tie trunk caller’s ability to dial 0 forthe telephone system operator.0- Off1- On 006Internal PagingThis option enables or disables a DISA or tie trunk caller’s ability to use thetelephone system’s Internal Paging.0- Off1- On 007External PagingThis option enables or disables a DISA or tie trunk caller’s ability to use thetelephone system’s External Paging.0- Off1- On 008Direct Trunk AccessThis option enables or disables a DISA or tie trunk caller’s ability to useDirect Trunk Access (Service Code 815).0- Off1- On 009Forced Trunk Disconnect This option enables or disables a tie trunk caller’s ability to use Forced TrunkDisconnect (Service Code *26). This option is not available to DISA callers.0- Off1- On 010 Call Forward Setting by Remote Via DISA 0- Off1- On 011DISA/Tie Trunk Barge InThis option enables or disables a DISA or tie trunk caller’s ability to use theBarge In feature.0- Off1- On 0Related FeaturesNight Service