and waits for the incoming call association information in step 440 when the digit is recognized by the primary media server the first gateway end to end in band signals a series of digits back toward the incoming trunk and terminating user the signals include identifiers for the type of igar call and the irc y user in step 444 the primary media server then suspends call processing on cid y in step 524 the digits are collected identifying the irc y user and passed by the primary media server to the irc y user or agent 260 the agent 260 extracts cid y and cid z and informs the call controller that cid y and cid z contain the two inter region trunk ports that satisfy the igar request in step 528 the call controller in step 528 finds the two trunk ports one in each service and connects port a with trunk y and port b with trunk z the further process for an igar network fragmentation call is now discussed with reference to steps 532 536 and 448 452 the spare media server suspends call processing on cid z when receipt of the digit is acknowledged and waits for the incoming call association information in step 448 when the digit is recognized by the primary media server the first gateway in band signals a series of digits back toward the incoming trunk and terminating user the series of digits include identifiers for the type of igar call and user b in step 524 the digits are collected identifying user b and normal call processing for a pstn call thereafter occurs in step 544 further call processing is continued on either type of igar call using conventional techniques for example further call processing.