ADTRAN 550 user manual Strip MSD

Chapter 11. Dial Plan

	If the incoming number is ten digits, but with a different area code, it is for-
	warded to the network as ISDN-National preferred.
ISDN-NATIONAL	Ignores the incoming numbering plan and type and substitutes the ISDN/
DMS RESERVED	Telephony numbering plan and National number type. Ten digits are sent
PREFERRED	to the network. Leading ones, if present, are stripped out and the area code
	set in global parameters is added if only seven digits are supplied. This
	action may be required in areas with ten-digit local dialing.
ISDN-NATIONAL	Sends the digits provided as National number type.
AS DIALED
	When SWITCH TYPE is set to 4ESS, many installations require the
	National form where possible; this may also be the preferred form in
	10-digit calling areas.
STRIP MSD
	Write security: 3; Read security: 5
	Strips a selected quantity (choose from NONE, 1, 2, and 3) of the Most Signif-
	icant Digits (MSD) of a dialed number 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.
	STRIP MSD does not affect CALL ACCEPT criteria. All of the digits
	(including the MSDs that are subsequently stripped) are used as
	accept criterion.

11-12 ATLAS 550 User Manual 61200305L1-1