allow to connect web phone if no DL (#304)
allow to connect web phone if no DL (#304)

* allow to connect if no DL

* not allow to make call if no DL

ringcentral/ringcentral-js-integration-commons,ringcentral/ringcentral-js-integration-commons,ringcentral/ringcentral-js-integration-commons,ele828/ringcentral-js-integration-commons,ele828/ringcentral-js-integration-commons,ele828/ringcentral-js-integration-commons