To dial Orbtalk from another provider:

**(Provider SIP broker access string)*7579 <Account>

To dial another provider from Orbtalk:

**757*(Provider SIP broker code)<Account>

You can obtain the SIP code from: http://www.sipbroker.com/sipbroker/action/providerWhitePages

Search for the provider and the SIP code will be shown.

To obtain the SIP broker access string, please contact your provider.