HP3000-L Archives

October 2002, Week 5

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Subject:
Re: DTC RJ45 to Modem DB25 Pins?
From:
Tracy Pierce <[log in to unmask]>
Reply To:
Tracy Pierce <[log in to unmask]>
Date:
Thu, 31 Oct 2002 10:11:38 -0800
Content-Type:
text/plain
Parts/Attachments:
text/plain (105 lines) 
try http://yoda.uvi.edu/InfoTech/rj45.htm ?

at ftp://ftp.dgii.com/support/techsupport/common/cable.html it says just
what I'd have guessed: center pair is TxD & RxD.

And rather than figure out which is which, try it one way and if it doesn't
work, (snip & ) flip the connector.



> -----Original Message-----
> From: Atwood, Tim (DVM) [mailto:[log in to unmask]]
> Sent: Thursday, October 31, 2002 10:05 AM
> To: [log in to unmask]
> Subject: Re: DTC RJ45 to Modem DB25 Pins?
>
>
> OK, the "HP DTC Cabling and Racking Guide" implies this is
> not possible. At
> least in so far as it does not list the pin configuration to do this.
>
> There is a pin configuration for "DTC DB25 to Modem DB25" but
> none for "DTC
> RJ45 to Modem DB25".
>
> Does anyone have any experience with this? Can anyone confirm
> the manual's
> lack of these connections really means it can not be done? Do
> I need to
> acquire a DTC DB25 distribution box (what I sometimes hear
> referred to as a
> "POD")?
>
> -----Original Message-----
> From: Thomas M. Root [mailto:[log in to unmask]]
> Sent: Thursday, October 31, 2002 6:26 AM
> To: HP3000 List; Tim Atwood
> Subject: Re: DTC RJ45 to Modem DB25 Pins?
>
>
> Tim,
>
> You'll probably have to change the transmit and receive lines
> to connect to
> a modem and if your modem uses the full set of modem control
> signals you'll
> want to check DTR, DSR, RTS, CTS, and CD.
>
> You can find the pinouts for various DTCs in the "HP DTC Cabling and
> Racking Guide" at http://docs.hp.com/hpux/pdf/5961-6410.pdf.
> Page number
> 81 has the RJ45 pinouts and I think there may be a complete
> wiring diagram
> for a DTC to Modem cable.
>
> HTH,
>
> Thomas M. Root
> Desert Schools FCU
> Phoenix, AZ
> 602-433-152
> [log in to unmask]
> [log in to unmask]
>
>
> On Wed, 30 Oct 2002 12:04:02 -0800, Atwood, Tim (DVM)
> <[log in to unmask]> wrote:
>
> >This is the pin config we already use for terminals. But the
> same cables do
> >not seem to work with a modem. No TR signal.
> >
> >-----Original Message-----
> >From: Mike Hornsby [mailto:[log in to unmask]]
> >Sent: Wednesday, October 30, 2002 11:43 AM
> >To: Atwood, Tim (DVM)
> >Subject: Re: [HP3000-L] DTC RJ45 to Modem DB25 Pins?
> >
> >
> >http://www.internetcsi.com/special/techspec/rj45%20to%20db25.pdf
> ><http://www.internetcsi.com/special/techspec/rj45%20to%20db25.pdf>
> >----- Original Message -----
> >From: Atwood, Tim  <mailto:[log in to unmask]> (DVM)
> >To: [log in to unmask] <mailto:[log in to unmask]>
> >Sent: Wednesday, October 30, 2002 2:42 PM
> >Subject: [HP3000-L] DTC RJ45 to Modem DB25 Pins?
> >
> >Does anyone know the pin configurations to go from a DTC
> RJ45 distribution
> >panel to a Modem?
> >
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