Issue: Legacy video endpoints can’t connect to Cisco video endpoints (or ex-Tandberg) when using this format of dial string IP-ADDRESS##ALIAS (example, 18.104.22.168##6100) also called as ## TCS4 dialing (Polycom video endpoints use this).
Platform: Cisco VCS Expressway running on any software.
Solution: Create an inbound search rule on Cisco VCS Expressway that changes the orginal format IP-ADDRESS##ALIAS to an email format or URI ([email protected]).
1. Logon to Cisco VCS Expressway.
2. Go to VCS Configuration > Dial Plan > Search Rules.
3. Create new Search Rule and populate all the required fields. The important settings here are:
Mode: Alias Pattern Match Pattern Type: Regex Pattern String: ^(.*)##(\d*)? Pattern Behavior: Replace Replace String: \[email protected]\1
Regular expression meaning:
^ - signifies the start of a line. .* - matches against any sequence of characters. () - groups a set of matching characters together. # - is a hash or pound character. \d - Matches any decimal digit, i.e. 0-9. ? - Matches 0 or 1 repetitions of the previous character or expression.
Cisco VCS has a built-in pattern check tool that is very usefull. Navigate to Maintenance > Tools > Check Pattern.