/* @desc 'address digits' value sent in the 'Subsequent number' parameter in a SAM message, containing enough number digits to allow the routing to the SIP side, where the IAM contained less than the minimum digits to route the call through to the SIP side.
/* @desc 'address digits' value sent in the 'Subsequent number' parameter in the SAM message, containing the second part of the number, where the IAM contained already enough digits to route the call through to the SIP side.
/* @desc 'address digits' value sent in the 'Subsequent number' parameter in the second SAM message, containing the third part of the number, where the IAM contained already enough digits to route the call through to the SIP side.
/* @desc 'address digits' value sent in the 'Subsequent number' parameter in the third SAM message, containing the fourth and final part of the number with the amount of digits leading to the overall maximum of digits allowed according to the numbering plan, where the IAM contained already enough digits to route the call through to the SIP side.