Applies To

Call2Teams - Customers


There are some dialing rules built into Teams that cannot be circumvented.

Numbers beginning with zero

Numbers beginning with ‘0’ are converted to full E.164 numbers. 

Extension numbers beginning with ‘0’ should be changed so they don’t have this prefix.

Feature codes beginning with an asterisk *

Many PBXs have feature codes beginning with ‘*’ that can be dialed. 

Most will work from Teams, but *11, *12 and *13 do not. 

Microsoft have indicated that they reserve the right to block some other two-digit star codes as they allocate them for new native Teams features. 

If customers make use of these blocked feature codes then look to see if the PBX can be configured to change the codes to ones that will not be blocked by Teams.

Short codes

Users may have a number of public short codes for public services. 

These may be handled as internal extensions rather than PSTN calls, or customer's users are dialling bespoke numbers that do not translate as expected. 

Microsoft expects everything to be dialed in the E.164 format, and Call2Teams treats anything 6 digits or less, in length, as an internal extension.

Further Reading

We have a more detailed article on Dialling Rules here: Dialling Rules

See this Microsoft article: Create & Manage Dial Plans


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