The exclamation-point wildcard (!) in a Cisco Unified CM route pattern represents “one or more digits of variable length.”

Pattern 9.011! therefore permits any international access code (011) followed by any length destination number, allowing a single pattern to cover all international destinations and thus minimizing the total number of route patterns required.

A. 9.011# ‘#’ is an end-of-dial marker; it does not allow additional variable digits, so a separate pattern would be needed for each length.

B. 9.011@ ‘@’ matches only NANP-compliant numbers (North American dialing), not generic international numbers, so it omits many destinations.

D. 9.011 ‘’ is treated as the literal star key, not a wildcard; no digits follow, so it cannot match variable-length numbers.

1. Cisco Unified Communications Manager Administration Guide, Release 12.5(1), “Route Pattern Wildcards and Special Characters,” Table 44: ‘!’ – “Matches one or more digits (variable length).”

2. Cisco Unified CM Features and Services Guide, Release 14, ch. Dial Plan, section “Wildcards (Special Characters),” p. 16-9: describes ‘#’, ‘@’, ‘’, and their specific behaviors; notes that ‘@’ is limited to NANP and ‘#’ marks end of dial string.

3. Cisco Press, “Deploying Cisco Unified Communications (CVOICE) v8.0 Foundation Learning Guide,” ISBN 9781587204173, ch. 5, “CUCM Dial Plan,” p. 177-178: explains that 9.011! is the recommended single pattern for international dialing because ‘!’ covers variable-length subscriber numbers.