billp@clutx.clarkson.edu (Bill Plunkett) (08/01/90)
I was asked to help identify some equipment that was given to us recently. Among this stuff was what appears to be some sort of modem. It is about the size and shape of two Hayes style modems, one on top of the other. In fact, inside the box is a board in one slot and an empty slot apparently intended to accomodate a second identical board (judging by the second set of identical blank holes and labels on the front panel). This suggests some sort of modular approach. The box also appears to be made to slide into a rack and plug in (there are pins protruding from the rear). The front panel says "NETWORK ACCESS COMPUTER" in big letters, presumably the name of the device. It also has a "DTS" logo, and the rear panel indicates that it was manufactured by Dynamic Telecom Systems, Inc, Columbus, OH. Directory assistance for Columbus couldn't find any such company listed. The rear panel also said: NAC Model 2-L. On the front panel is what looks like a four pin RJ-11 phone jack, but is labelled "RJ-31X CONNECTION". There are four LEDs: "OFF HOOK", "DTMF", "L/S POWER", "SEIZE & DIAL" and "400 Hz". There are also two trim-pot adjustments: "DTMF" and "DIAL TONE". There are blank holes for the phone jack, LEDs, and trim pots of a second board (not installed). The device appears to be new, in the box, but came with no instructions. There is a command summary sheet, but the commands look strange to me (nothing like Hayes commands). For example, on section on the sheet says: 10266 BASIC INSTALLATION COMMANDS 1 Type of trunk/line 1 loop 2 ground 2 Type of trunk/line 1 DTMF 2 rotary dial 3 Account code options 1 opt. 2 forced 4 Rotary digit reception 1 yes 2 no 5 NAC provides d/t 1 yes 2 no 6 Type of d/t provided 1 precise 2 400 Hz 7 Type of CO d/t 1 precise 2 other 8 Screening tables or speed 1 screening 2 speed numbers numbers tables There are many other options outlined, some like "store and fwd calls: yes/no" and "answer on 15th ring: yes/no" and some more mysterious, like "N-O-N = 2 pulses of 400 Hz: yes/no". I don't know if theses things (we actually have four) will prove to be of any use, but I sure am curious to know what they are. Anyone have any idea? Thanks, Bill