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555-230-024
12-8 Issue 5 January 1998
Intrusion
Intrusion is similar to Forced Disconnect, except that it allows a network operator
to interrupt a local call and announce an incoming toll call. The operator hears
and speaks only with the party to whom the toll call is directed. Restrictions are
the same as those listed for Forced Disconnect.
Re-Ring
When a local call is interrupted by a toll call, the original call is kept on hold until
the toll call in complete. When the called party hangs up after the toll call, the
system rings back to remind the called party that the original call is still active.
Authorization Codes
Authorization codes are used on particular calls to temporarily raise a tele-
phone’s Facility Restriction Level. This is useful for those who make calls from
telephones other than their own or from outside the network. If a call you dial is
blocked because the telephone’s Facility Restriction Level is too low, you can
enter your authorization code. If the Facility Restriction Level associated with the
authorization code is equal to or higher than the Facility Restriction Level of the
trunk facilities required to place the call, the call is then completed. Up to 90,000
different authorization codes will be in effect for your system at any one time.
Using DEFINITY ECS’s system management tools, you can assign authorization
codes and change their associated Facility Restriction Level and network access
permissions.
Network Interfaces and Equipment
DEFINITY ECS supports a variety of interfaces to voice and data networks.
Trunks supply links between DEFINITY ECS, the public network, and other
switches. DS1 interfaces offer high-speed digital connectivity between switches.
Trunk Group Circuits
Trunks provide the communications links between DEFINITY ECS and other
switches, including central office switches and other premises switches. Trunks
that perform the same function are grouped together and administered as trunk
groups. Trunks interface with DEFINITY ECS via port circuit packs. DEFINITY
ECS trunk group circuit types include the following: