the line being used by the customer i e the tn obtained by iclid is the tn of the line to be deactivated if this is not the case then the os attendant requests that the caller enter the telephone number of the line to be deactivated and the deactivation date block 511 fig6 the os attendant then schedules block 512 a recent change order for execution by switch 100 and access system 125 1 serving station sm on the date requested by the subscriber the os attendant then terminates the subscriber 39 s call as represented by block 513 if the subscriber on the other hand responds to item c i e deactivate service then os 150 block 527 prompts the caller to determine if the service that is to be deactivated is associated with the telephone number telephone station from which the subscriber is currently calling if the subscriber answers in the negative then os 150 requests that the subscriber enter i e dial the telephone number of the telephone line that is to be deactivated block 528 os 150 then 34 plays back 34 a verbal rendition of the entered number as a way of confirming the subscriber 39 s entry os 150 then confirms block 529 the subscriber 39 s request of immediate deactivation of telephone service os 150 block 530 then consults its associated memory records to identify the switch and access system serving the telephone line that is to be deactivated assuming that the telephone line is associated with switch 100 and access system 125 2 then os 150 determines the crv associated with that telephone line os 150 then generates block 531 a.