I have a feeling that the answer to this is no, but I want to check - does an SV9100 system absolutely require a PVA card installed in the system in order to receive check in/out commands from a hotel's PMS system? I'm pretty certain we've got lots of customer sites where they've got a PMS and are able to check in rooms on their NEC systems from there without a PVA card, but we've got a 3rd party company who are in the process of installing some interfacing software that sits between the NEC and the hotel's PMS system and it doesn't seem to be working properly with the NEC. Their system is sending the following command to the NEC on PMS port 5129 which I believe should set the toll restriction class on that room to 10, but it isn't working:

Tx: RST10 2112

I would expect to see the "Toll Restriction Class on Check-in" changing to 10 for room 2112 under system programming 42-02, but it doesn't seem to update. I set it manually to 13 in 42-02 to see if the command would switch it back to 10, but it didn't work.

Am I even looking in the right place for how this should be working on an NEC?

Here's a part of the communication they've sent me when they've sent a check-in command to the NEC, it seems to have been acknowledged by the NEC, but I don't know how to tell if the room has =actually been checked in:

Tx: CHK0 2112
3851558 [] INFO : - IPCID_NECSV9100PBX_46|Tue Mar 8 15:34:14 2022>sendPbxMsg(#5)->Tx(15): 0243484b3020323131322020202003
3851558 [] INFO : - IPCID_NECSV9100PBX_46|Tue Mar 8 15:34:14 2022>callBack(#5)->Posted CKO_MSG to 2112
3852657 [] INFO : - IPCID_NECSV9100PBX_46|Tue Mar 8 15:34:15 2022>processLinkActive(#5)->Rx(20):060257414b322032313132202020202020202003
3852658 [] INFO : - IPCID_NECSV9100PBX_46|Tue Mar 8 15:34:15 2022>handleLinkControlMsg(#5)->ACK

This is one area of the NEC that I've never really been able to get to grips with. Maid status codes is another thing. We usually end up putting in place a workaround (although very effective) to get room status codes output over a system's SMDR in a format which can be understood by software sitting between the NEC and a hotel's PMS, but in this instance it's a different company providing the software and they don't want it to work over the SMDR like that.

Any help or clarification would be great please if anyone knows about this stuff. I know it's a bit of a niche thing.

Thanks all!