Configuring X.25 8-29
The SmartSwitch 1800 routes traffic based on the user data field if the U operator is
present in the SVC routing table. The gateway also allows the U operator, and can
include user data field operations.
Replacing Called/Calling Addr ess or User Data
To replace all or part of any of thes e fields, pres s [B] or [C] at the Translation Template
Maintenance Menu. When prompted, enter the desired information as described
below:
L = Literal digits, which means that the actual digits you enter here will replace that
same number of digits in the specified field. Type L followed (with no spaces ) by
the desir ed di gi ts, 0–9. For example, typing L1234 [Enter] will replace four digits
in the selected part of the field with the actual numbers 1234.
X = Called address. The characters entered here are not necessarily the exact char-
acters of original called address, but rathe r the characters (dig its or wildcards) of
the template ID that match the original called address (that part not already trans-
lated).
Type X followed (with no spaces) by the desired characters, 1–9, A–F, indicating
which positions of the 15 digits in the original called address are to replace the
selected portion of the packet. For example, typing X1234 [Enter] takes the first,
second, third, and fourth char acters of the (rema ining ) origin al called addres s part
of the template ID.
The matching procedure is described in the following example. Assume:
◆The called address of the packet is 31101234567800.
◆The Template ID is 3110??*U123??.
◆The Translation Formula is L1234X567.
The translation inserts literal digits 1234, then takes the characters from the
original called address that match the fifth, sixth, and seventh characters of the
Template ID (??*). ?? matches the first two character s fro m the cal led address that
have not already been changed (12), and * matches the entire string of remaining
characters. Therefore, the translation result is 12341234567800.
G = Calling address. The characters entered here are not necessarily the exact char-
acters of original calling address, b ut rather the characters (dig its or wildcards) of
the template ID that match the original calling address.
Type G followed (with no spaces) by the desired characters, 1–9, A–F, in dicating
which positions of the 15 digits in the calling address are to replace the selected
portio n of the p ac k et.
U = Original user data. Note that the user data field is divided into four bytes of pro-
tocol identifier followed by twelve b ytes of "real" user data; the onl y part that can
be changed here i s the real u ser d ata. The ch aracter s enter ed here ar e not the a ctual
characters of user data, but the characters (digits or wildcards) of the template ID
that match the original user data (that part not already translated).
Type U followed (with no spaces) by the desired characters, 1–9, A–C, indicating
which positions of the twelve digits in the original user data are to replace the
sele ct ed po rtio n o f t he p ack et.