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The Snom C520 does not use the regex dial string pattern. You can define your dial plan string using this as an example.

Example: Dials when UK number has been entered, or when 156 has been entered.


  1. Matching rule: 0[1-9]xxxxxxxxx number starting with 0, preceded by a 10-digit number 
  2. Matching rule: 156 
  3. Dialling rule x+P
  4. You must press the "Talk" speaker key for the rule to work.
  5. Wait for dial tone and then enter the number.
  6. Once the number entered matches either of the rules "0[1-9]xxxxxxxxx|156"
  7. the C520 will dial the number "x+P"