Ericsson MD110 - Direct Inward System Access Code (DISA); Extension Numbers; Common Abbreviated Dialing; TCD Category

ADMINISTRATION AND EXAMPLE PROGRAMMING LBI-39039B
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5.3.3. Direct Inward System Access Code (DISA)
The Direct Inward System Access (DISA) feature allows Public Network users to call the MD110 with a common public
number, receive a second dial tone, and dial an EDACS radio.
DISA requires analog end-to-end signaling from the caller and across the Public Network. The trunks or lines connecting
to DISA should provide line clearing. (Please refer to section 2.2 for a discussion of line clearing.)
NANSI
NUMTYP DI Direct Inward System Access
NUMSE 5000
5.3.4. Extension Numbers
Extension numbers are defined as the range from 4000 to 4099.
NANSI
NUMTYP EX Extension
NUMSE 4000&&4099 Numbers 4000-4099 are for extension use
5.3.5. Common Abbreviated Dialing
Common Abbreviated Dialing (CAD) numbers are defined as the range from 4100 to 4999.
NANSI
NUMTYP AC Abbreviated Calling
NUMSE 4100&&4999 Numbers 4100-4999 are for CAD use
5.3.6. TCD Category
TCD CATEGORY
Extensions 0
EDACS Routes 1
Private Network Routes 2
Public Network Routes 3
See Table 1 for the EDACS number plan.
These entries allow TCD Categories to dial certain numbers.