Chapter 11. Dial Plan
11-12 ATLAS 550 User Manual 61200305L1-1
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-N
ATIONAL
DMS R
ESERVED
PREFERRED
Ignores the incoming numbering plan and type and substitutes the ISDN/
Telephony numbering plan and National number type. Ten digits are sent
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-N
ATIONAL
A
S
D
IALED
Sends the digits provided as National number type.
STRIP MSD
Write security: 3; Read security: 5
Strips a selected quantity (choose from N
ONE
, 1, 2,and3)oftheMostSignif-
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 S
TRIP
MSD set to 1, all digits would be sent toward the network
except the leading 9.
When S
WITCH
T
YPE
is set to 4ESS, many installations require the
National form where possible; this may also be the preferred form in
10-digit calling areas.
S
TRIP
MSD does not affect C
ALL
A
CCEPT
criteria. All of the digits
(including the MSDs that are subsequently stripped) are used as
accept criterion.
