[Asterisk-Users] TE410P Errors under load

[Scott Stingel]

Yes, that's true how the pairs are formed, and its also true that a (short)
ethernet cable can normally be used as a straight through E1/T1 cable, since
all wires are connected.

We need an E1 crossover cable for the tests we're running, and so we have to
make one, because an ethernet crossover cable will not work.

For anyone trying to make an E1/T1 crossover, here's a nice diagram from NMS
that may help.  The only pins that are needed in a short cable for testing
are 1,2,4,5.

Click on:
http://www.nmscommunications.com/NMS/nms_technotes.nsf/0/91d49c8785b2aab0852
566fa0050740a?OpenDocument

Cheers
Scott

Scott M. Stingel 
Emerging Voice Technology Inc.

Email:          scott at evtmedia.com <mailto:scott at evtmedia.com>   
URL:            www.evtmedia.com <http://www.evtmedia.com>   



> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com 
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> Brian D Heaton
> Sent: Saturday, November 22, 2003 10:04 PM
> To: asterisk-users at lists.digium.com
> Subject: RE: [Asterisk-Users] TE410P Errors under load
> 
> 
> A 568B Ethernet cable will be paired as follows:
> 
> 1 ORG-WHT
> 2 ORG
> 3 BLU
> 4 GRN-WHT
> 5 GRN
> 6 BLU-WHT
> 7 BRN-WHT
> 8 BRN
> 
> As you can see you still maintain twisted pair integrity for T1
> applications (1-2, 4-5), as well as Ethernet (1-2, 3-6).  The primary
> issue would be shielding as most Ethernet cables aren't shielded.
> 
> 			THX/BDH
> 
> 
> 
> On Sat, 2003-11-22 at 13:43, Ray Burkholder wrote:
> > Might you be getting problems because you are using an 
> Ethernet cable?  If
> > my memory serves correctly, an Ethernet cable is paired 
> differently than an
> > E1/T1 cable.
> 
> 
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