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Route filters can be used only with the @ route pattern to match certain elements or special
numbers of a numbering plan. A route filter applied to a pattern not containing the @
wildcard is ignored.
The logical expression entered with the route filter can be up to 1024 characters, excluding
the Not-Selected fields.
For large-scale deployments, use explicit route patterns rather than the @ wildcard and
route filters. This practice also facilitates management and troubleshooting because all
patterns configured in CUCM are easily visible from the Route Pattern Configuration page.
Tags serve as the core component of a route filter. A tag applies a name to a subset of the
dialed-digit string. For example, the NANP number 972 555-1234 comprises LOCALAREA-
CODE (972), OFFICE-CODE (555), and SUBSCRIBER (1234) route filter tags.
Table 11-7 provides the complete list of tags available for the NANP.
Table 11-7 NANP Tags
Tag Description
AREA-CODE This 3-digit area code in the form [2–9]XX identifies the area
code for long-distance calls.
COUNTRY CODE These 1-, 2-, or 3-digit codes specify the destination country
for international calls.
END-OF-DIALING This single character identifies the end of the dialed-digit
string. The # character serves as the end-of-dialing signal for
international numbers that are dialed within the NANP.
INTERNATIONAL-ACCESS This 2-digit access code specifies international dialing. Calls
that originate in the United States use 01 for this code.
INTERNATIONAL-DIRECT-DIAL This 1-digit code identifies a direct-dialed international call.
Calls that originate in the United States use 1 for this code.
INTERNATIONAL-OPERATOR This 1-digit code identifies an operator-assisted international
call. This code specifies 0 for calls that originate in the United
States.
LOCAL-AREA-CODE This 3-digit local area code in the form [2–9]XX identifies the
local area code for 10-digit local calls.
LOCAL-DIRECT-DIAL This 1-digit code identifies a direct-dialed local call. NANP
calls use 1 for this code.
Route Filters 277
■ Example 1: A route filter that uses AREA-CODE and the operator DOES-NOT-EXIST
selects all dialed-digit strings that do not include an area code (for example, seven-digit
calls).
■ Example 2: A route filter that uses AREA-CODE, the operator ==, and the entry 515
selects all dialed-digit strings that include the 515 area code (equivalent to a route
pattern 515XXXXXXX or 1515XXXXXXX).
LOCAL-OPERATOR This 1-digit code identifies an operator-assisted local call.
NANP calls use 0 for this code.
LONG-DISTANCE-DIRECT-DIAL This 1-digit code identifies a direct-dialed, long-distance call.
NANP calls use 1 for this code.
LONG-DISTANCE-OPERATOR These 1- or 2-digit codes identify an operator-assisted, longdistance
call within the NANP. Operator-assisted calls use 0
for this code, and operator access uses 00.
NATIONAL-NUMBER This tag specifies the nation-specific part of the digit string for
an international call.
OFFICE-CODE This tag designates the first 3 digits of a 7-digit directory
number in the form [2–9]XX.
SATELLITE-SERVICE This 1-digit code provides access to satellite connections for
international calls.
SERVICE This 3-digit code designates services such as 911 for
emergency, 611 for repair, and 411 for information.
SUBSCRIBER This tag specifies the last 4 digits of a 7-digit directory
number in the form XXXX.
TRANSIT-NETWORK This 4-digit value identifies a long-distance carrier. Do not
include the leading 101 carrier access code prefix in the
TRANSIT-NETWORK value. Refer to TRANSITNETWORK-
ESCAPE for more information.
TRANSIT-NETWORK-ESCAPE This 3-digit value precedes the long-distance carrier identifier.
The value for this field specifies 101. Do not include the 4-
digit carrier identification code in the TRANSIT-NETWORKESCAPE
value. Refer to TRANSIT-NETWORK for more
information.
Table 11-7 NANP Tags (Continued)
Tag Description
278 Chapter 11: Call Routing Components
■ Example 3: A route filter that uses AREA-CODE, the operator ==, and the entry
5[2–9]X selects all dialed-digit strings that include area codes in the range of 520
to 599.
■ Example 4: A route filter that uses TRANSIT-NETWORK, the operator ==, and the
entry 0288 selects all dialed-digit strings with the carrier access code 1010288.
Route patterns and translation patterns can be configured to block the pattern. Patterns that
are blocked prevent calls to the blocked pattern cluster-wide.