Chapter 5. Using the Terminal Menu
DID Prefix
Write security: 3; Read security: 5
Defines to ATLAS the prefix digits which are not received as a part of the DID number. ATLAS uses the combination of prefix and DID number to deter- mine the User end point that should receive the incoming call.
This option only displays if Direct Inward Dialing (DID) is set to Enabled. If DID is Disabled, then you must define the trunk number.
Trunk Number
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When the Network connection does not provide DID digits, then ATLAS must be given a number to use to determine which user end point should receive the incoming call. This field only displays when Direct Inward Dialing is set to Dis- abled.
The trunk number must be specific (i.e., no “wild cards”).
Example: If a certain incoming DS0 (trunk) is meant to connect to an end point with the accept number of
Strip MSD
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This option allows a selected quantity of the Most Significant Digits (MSD) of a dialed number to be stripped prior to being forwarded out of the port.
Example:
A Network port could be set to accept all calls beginning with 9 (9$), and then with Strip MSD set to 1, all digits would be sent toward the Network except the leading 9.
The Strip MSD parameter does not affect the Call Accept criteria. All of the digits (including the MSDs that are subsequently stripped) are used as 
accept criteria.
Source ID
The Source ID field is used to simplify the creation of a Dial Plan in applications where the criteria for switching calls to a certain end point is a function of which end point originated the call.
•Default value = 0. The default ID for all end points is 0 and all accept # s is 0. With default values, all calls are routed based only on dialed number.
•Multiple end points can have the same Source ID
•When creating the Call Accept list, specify a Source ID(s) as well as a dialed number or range of dialed numbers to accept.
Example:
An application requires that all calls originating from Port 1 of the Quad T1/ PRI module in Slot 1 be switched to Port 4 of that same module. Assign a unique Source ID (e.g., 7) to Port 1 of the module, and then configure Port 4 to only accept calls from that unique Source ID (7).
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