There are situations where the administrator wants to block calls from the enterprise to certain destinations due to toll-charges (for example, premium numbers such as operator assistance, and in the United States, 1900 and 1411 numbers).

Note that the current release of Office Communications Server does not allow for a configuration that can be used to explicitly block a destination. Calls are blocked implicitly if no matching pattern is found in the Routing table.

For example, if the administrator chooses to block calls to 1900 and 1411 numbers, he or she must define regular expressions that exclude 1900*. The following configuration shows an example of how this can be accomplished, and it does not preclude other ways of accomplishing the same effect.

Table 1. User Policy

User policy Phone usage

Default Calling Policy

Local

International

GlobalPSTNHopoff

Table 2. Routes

Route name Number pattern Phone usage Gateway

Redmond Local Route

^\+1(425|206|253)(\d{7})$

Local

Red-GW1

Red-GW2

Dallas Local Route

^\+1(972|214|469)(\d{7})$

Local

Dallas-GW1

NY Local Route

^\+1(212|646|917)(\d{7})$

Local

NY-GW1

Universal Route

^\+?(?!(1900|1411))(\d*)$

GlobalPSTNHopoff

Red-GW1

Red-GW2

Dallas-GW1

NY-GW1

Intl Route

^\+([2-9])(\d*)$

International

Red-GW1

The Universal Route is modified to route all numbers except 1900 or 1411 numbers with an optional leading +.

See Also