We always send a T1 crossover "box" made up of two jacks and a surface mount box. I finally started to do this because there is always some nimrod that will break the tab off the crossover we sent and then they don't have the means or brain power to make a replacement cable. Doing the crossover box allows them to use two straight cables which are pretty much always readily available. -Richey -----Original Message----- From: VoiceOps [mailto:voiceops-bounces at voiceops.org] On Behalf Of Jay Hennigan Sent: Friday, October 31, 2014 2:54 PM To: VoiceOps Subject: Re: [VoiceOps] T1 Crossover Cable On 10/31/14, 11:35 AM, Alexander Lopez wrote:

I have always done 1 to 4, 2 to 5.

But as I read below this is incorrect.

To add further confusion, google returns both as valid.

So what is the correct one?

Technically, 1-to-5 and 2-to-4 is correct but either should work. The other way swaps tip and ring which won't make a difference in this or most applications. Odd-numbered pins are tip, even are ring. Mostly white conductors with color stripes should go the odd pins (tip). -- Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops