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Serial ports of rx2600 / rp3440

 
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Serial ports of rx2600 / rp3440

Hi all!

I'm trying to access an rx2600 using a serial connection (or really, a customer's rp3440; both machines have the multiplexed DB25 connector on the MP board). I do have console access through the console RS232 port, but I'd like to be able to connect through another terminal connected to the remote modem or general purpose port.

An ioscan -fun suggests the devices are /dev/tty1p0 (console), /dev/tty1p2, and /dev/tty1p4, but I've been unable to connect though any of them, or even set the serial characteristics through stty...

What am I missing?
27 REPLIES 27
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Acclaimed Contributor

Re: Serial ports of rx2600 / rp3440

I did not work with modems for a long time, but IIRC the modem port of both machines is under control of the MP by default, hence you connect to the MP and share the console with the local port.

Hope this helps!
Regards
Torsten.

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Re: Serial ports of rx2600 / rp3440

Torsten,

thanks for the suggestion.

To avoid additional problems caused by some modem control signals incorrectly set, until now I played with the third serial port (labeled "UPS", and described as "general purpose" in the quick specs).

Just did a quick test with the terminal connected to the remote serial port (setting it to the 19200 bps suggested by the MP's CA display) - no success.

cu,
Martin
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Acclaimed Contributor

Re: Serial ports of rx2600 / rp3440

Did you check the CA command?

http://docs.hp.com/en/5991-6006/ch06s01.html#d0e4561

CA: Configure asynchronous local and remote serial port parameters

Hope this helps!
Regards
Torsten.

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Re: Serial ports of rx2600 / rp3440

Of course. Unfortunately, CA only configures the two serial ports (console and remote) that I *don't* use...
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Re: Serial ports of rx2600 / rp3440

The remote connector is intended for modems, UPS is AFAIK for UPS only.

Hope this helps!
Regards
Torsten.

__________________________________________________
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those who understand binary, and those who don't.

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Re: Serial ports of rx2600 / rp3440

"I'm trying to access an rx2600 using a serial connection" : What are you trying to access : a telnet session , I guess.

What device do you have on the other end of the serial cable. a PC or a Dumb Terminal ?

Are you accessing the serial port using a terminal emualation softawer , like kermit or Z-modem, ?

Are the term bits 9600/N/none set?

hth,
Raj.
" If u think u can , If u think u cannot , - You are always Right . "
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Re: Serial ports of rx2600 / rp3440

So the rp3440 comes with NO general purpose serial ports (as the "Serial Port A and B" are labeled "For factory use only" and are not mentioned in the QuickSpecs)??!

I can't believe that you have to buy one of those (8 port, at least) MUX PCI cards to connect a simple serial device...

cu,
Martin
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Re: Serial ports of rx2600 / rp3440

Is there a getty process running on the serial port? Without a getty "listening" on the serial port, don't expect anything to show on the terminal screen.
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Re: Serial ports of rx2600 / rp3440

Depending on the settings

MP:CM> ca

and

MP:CM> sa

the modem (connected to the MODEM connector) is either under MPs full control or can be used by the OS too (i guess this is what you want to do).

Refer to

MP:CM> help sa

MP:CM> help ca

Hope this helps!
Regards
Torsten.

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