ATLAS 550 System Manual Section 4, User Interface Guide
61200305L1-1F © 2002 ADTRAN, Inc. 281
DIAL PLAN (E1/PRA) > NETWORK TERM (PRA) > IFCE CONFIG (PRA) > FIRST DS0
Write security: 3; Read security: 5

Defines the first DS0 for this endpoint.The ATLAS 550 uses DS0s, starting with this selection, to send and

receive calls to and from the network (PSTN). The outgoing calls which are allowed or restricted over

these DS0s are set by OUT#ACCEPT (see Dial Plan > Network Term > Out#Accept on page 254) and

OUT#REJECT (see Dial Plan > Network Term > Out#Rej on page 256).

DIAL PLAN (E1/PRA) > NETWORK TERM (PRA) > IFCE CONFIG (PRA) > NUMBER OF DS0S
Write security: 3; Read security: 5

Specifies the number of DS0s ATLAS 550 uses for this endpoint.

DIAL PLAN (E1/PRA) > NETWORK TERM (PRA) > IFCE CONFIG (PRA) > STRIP MSD
Write security: 3; Read security: 5

Strips a selected quantity (choose from NONE, 1, 2, and 3) of the most significant 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.
DIAL PLAN (E1/PRA) > NETWORK TERM (PRA) > IFCE CONFIG (PRA) > NETWORK SPECIFIC FACILITY VOICE AND DATA
Write security: 3; Read security: 5

Enables the sending of appropriate information to the PSTN. Currently not supported for E1/PRA use.

DIAL PLAN (E1/PRA) > NETWORK TERM (PRA) > IFCE CONFIG (PRA) > CALLED DIGITS
TRANSFERRED
Write security: 3; Read security: 5

Some PRI switches may be provisioned to send only a portion of the called number (like DID). This menu

item allows the ATLAS 550 to know how many digits to expect (choose from NONE, THREE, FOUR, SEVEN,

and ALL). The default is ALL and would almost always be correct. If less than ALL digits are sent, then the

PREFIX is defined as follows:

STRIP MSD does not affect CALL ACCEPT criteria. All of the digits (including the MSDs that

are subsequently stripped) are used as accept criterion.
PREFIX
Write security: 3; Read security: 5

Displays only if CALLED DIGITS TRANSFERRED is not set to ALL. Enter the prefix for the digits

received.

Example: If the number of digits is four and the number called is 963-8615, the telco’s PRI switch

sends only 8615 and the prefix is set to 963. This entire number is then used to determine which

ATLAS 550 user port endpoint should receive the call.