Features402 System functions and features as of R3.0syd-0367/1.3 – R3.0 – 03.20139. 5. 4 Brokering (switching back and forth between two calls)A user can switch back and forth as often as required between his call party and theuser on hold.Fig. 194 BrokeringDetailed DescriptionTab. 188 Brokering (switching back and forth between two calls)Brokering is also possible from a conference to a user.Suffix dialling functionTab. 189 Brokering (switching back and forth between two calls): FunctionInterface Operating sequence / signalling on the termi-nal ScopeA Music on hold is played to user A, who is on hold1)1) With hold in the public exchange, the signalling depends on the network provider.Possible interfaces:internal, external, PISNC Possible interfaces:internal, external, PISNFunction System phones Analogue terminalBrokering •• With digit suffix dialling: 2R2 (R = control key)