Thanks for your help
I tried only MMC425 but I have the following message:
425: card restart
NO DTRK CARD
what is a DTRK card?
I searched the internet and found that it talks about Samsung OfficeServ 4 TRK Card which expands the analog phone line capacity to 4 analog lines. It is installed on the UNI card.
the system officeserv 7030 already supports 4 analog lines
the other 414 program I have not tried.
Here is what I found in the programming manual:
[414] MPD/PRS SIGNAL
Used on a per-trunk basis to define if a Trunk line is to be either a Metering Pulse Detection (MPD) or a Polarity Reversal Signal (PRS) trunk.
