Nucleus Paging Tx / Dumb Terminal Connection

akash1 · Post by **akash1** » Wed Jul 05, 2006 12:59 pm

Nucleaus Paging Transmitter has a way to interface to an dumb terminal
using the com port in the back. I poured through the manual and setup
everything as required, but I still can get the terminal or hyperlink
to communicate. I can toggle the modem selection in the front panel
and see the init string sent out from Nucleus to the dumb terminal (manual indicates, this to check connectivity)

But, no luck. I can't communicate via the dumb terminal. Has anyone else tried this and succedded.

Thnx.

Akash

kcbooboo · Post by **kcbooboo** » Wed Jul 05, 2006 2:19 pm

I had a "standard" controller in my 900 MHz Nuke, which has a DB9 connector on the front. That's the one I used. I set my Win95 HyperTerm to 19,200 baud, 8 data bits, no parity, 1 stop bit (8, N, 1). Much of the stuff that goes out of that port is plain text, but a few screens assume a VT100 emulation in HyperTerm, as they send out some escape sequences to clear the screen and position the cursor. I also had to make my own cable that cross-connected pin 1 to pin 4, and pin 2 to pin 3 at each end. There are more details in the Nucleus article on repeater-builder.com in the Motorola section.

Even though my SCM contained a modem, I never did anything with it, nor the connectors on the back of the chassis.

Bob M.

akash1 · Post by **akash1** » Wed Jul 05, 2006 2:45 pm

Thanks, I think what you have is probably a NUC II model, The ones we have do not have DB9 in the front. I will try out the cable again. I thought
I tried them all out.

A

kcbooboo · Post by **kcbooboo** » Wed Jul 05, 2006 3:21 pm

Yes, mine is a Nucleus II, but the N-2 with the advanced controller doesn't have a front panel DB9 connector, if I recall. So that could be the difference too.

I found that the communications speed in HyperTerm wouldn't always change unless I exited and restarted the program. Quite annoying. This may be a problem in Win95 and Win98SE versions only, however. That might have been fixed in a newer version.

I don't have any documentation on the Nucleus I.

Bob M.

Bruce1807 · Post by **Bruce1807** » Wed Jul 05, 2006 3:27 pm

Lt me know as I'm trying to hook Moscad into the Nuke.
I can find the driver but no information on the wiring

akash1 · Post by **akash1** » Wed Jul 05, 2006 3:40 pm

If I am correct, just cross connecting the two pairs is sufficient, no need to worry about CTS and RTS.

just wanted to line my ducks up before I go try it out.

thnx.

akash1 · Post by **akash1** » Wed Jul 12, 2006 2:57 am

The Nuc we have does not have a 9pin port in the front. It has a 25 pin
port (J14 - PSTN Modem PORT).

Tried cross connecting the appropriate pin 1,4 and 2,3 to the appropriate RXD,TXD,RTS,DTS signals to the 25 pin connector. But, no luck. Just
can't figure out what is going on.

Bruce1807 · Post by **Bruce1807** » Wed Jul 12, 2006 3:14 am

I don't see a signal ground on your pinouts.
Try full cables. Let me know I still want to hook up my Moscad system.

Shield N/C 1
Transmit Data 3 2
Receive Data 2 3
Request to Send 7 4
Clear to Send 8 5
Data Set Ready 6 6
System Ground 5 7
Carrier Detect 1 8
Data Terminal Ready 4 20
Ring Indicator 9 22

or a full null modem
Recieve Data 2 2 Transmit Data
Transmit Data 3 3 Recieve Data
Data Terminal Ready 4 6+8 DSR + Carrier Detect
System Ground 5 7 System Ground
DSR + CD 6+1 20 Data Terminal Ready
Request to Send 7 5 Clear to Send
Clear to Send 8 4 Request to Send

akash1 · Post by **akash1** » Thu Jul 13, 2006 4:57 pm

Tried the option "null modem with full handshaking #2" as listed
in

http://www.virtual-null-modem.com/help/ ... matics.htm

still no luck, I am going to try out one at a time and see what is going to work. Also, if this matters. I check the papers on the nuc we have. It has
an internal smart modem option. I can't toggle "Smartmodem/No modem" as given in the OPT-2 config steps in the manual.

Does this matter ? I am running out of options, I will keep trying. I really want to get this working.

thnx

Akash

akash1 · Post by **akash1** » Sat Jul 15, 2006 5:23 am

Anyone know how to remove this internal smart modem. ASFAIK this modem is for dial-up only not utilized for the tie line w/ the paging terminal.

Want to hear it from the experts, before I go any further....

thanks

kcbooboo · Post by **kcbooboo** » Sat Jul 15, 2006 5:52 am

On my Nucleus with the standard controller and NIU, remove the front panel, pull out the NIU (the right circuit board), and the modem was on two 30-pin plug-in boards at the top edge, just like old computer memory board. Spread the metal tabs on each side of the socket, tilt the board, and it comes right out.

The modem was split among two boards; one had a small battery mounted on it, the other has a small transformer. I think there was some lettering on them that led me to believe it was a smart modem, possibly made by Dallas Semiconductor.

After you remove it, I don't know if there will be any software settings you'll need to tell the station that there's no more modem inside.

Bob M.

akash1 · Post by **akash1** » Sat Jul 15, 2006 6:38 am

Thanks,

will try that next with the same full null modem cable.

akash1 · Post by **akash1** » Tue Jul 18, 2006 1:26 pm

Ok, got it working..

My controller had nothing similar to the one you had described. Here are the sequence of steps.

1. Pulled the controller out.
2. Modem board is a 2" x 2" board with a SIP header and 1/2" nylon stand offs.
* removed it
3. Used a standard 25pin to 9 pin null modem * NO LUCK*
4. Noticed a Jumper in th center of the area, where the modem was located. (3 pin SIP).
5. Moved the jumper to the alternate location
6. typed "connect 1200" & ASCII from the terminal ** CONNECTED **

Well, I was brave to do this. Hopefully I pulled the right board out and switched the jumper correctly. [no docs

]

Tried paging some pagers, the continute to work.

Thanks.