Originally Posted by
canadiancow
I think it might be in the OSI section.
CTCE (email), CTCP (I think? Phone?), etc.
So yes, similar to SSR.
Suddenly everyone's a TA and knows all the PNR codes and functions.
Other Service Information (OSI) and Special service request (SSR) are very different functions as the latter provides a way to request special items or services for a passenger such as VGML (Vegetarian meal) and requires immediate action and/or a reply from the receiving airline whereas the former provides a method of storing and transmitting service information to airlines without any action being required such as an corp. status i.e CEO or an alternate contact number not already stored in the main phone field in a PNR.