From: Scott Morris (smorris@xxxxxxxxxxxxxx)
Date: Thu Feb 22 2001 - 23:53:43 GMT-3
Actually, according to the ITU I.430 standard, S/T interfaces are 6 wires.
According to some Nortel documentation, S/T interfaces use all 8 wires. :)
So.... It depends on who you want to believe.
Bottom line, if it's not working... Add more wires! (grin) That makes it a
physical layer problem. The other post is correct that you're fine to about
18,000 feet from the SLIK. Anyway, add all your wires so that +/- power can
be transfered correctly, and life will be much better!
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Virnoche, Phil
Sent: Thursday, February 22, 2001 4:37 PM
To: CCIE newsgroup (E-mail)
Subject: Urgent ISDN Question !!!
Importance: High
Good afterrnoon,......
I had our switch technicians create some 4 wire (S/T) type interfaces off of
our campus switch to get into our CCIE practice lab. They are terminated on
a 66 block in another building. I verified them there, and wire-wrapped them
to a DSX panel that terminates in our lab.
I am using a 1003 router for my test device using a plain Jane config....
(Isdn switch-type basic-5ess.... no shut on interface..... deb isdn
q921...... sho isdn stat) just to verify the lines. Here is the problem:
When I got it to the lab building it wasn't working properly...... Sho isdn
stat initally showed Layer 1 active..... Layer 2 waiting to establish....but
after awhile Layer 1 goes to ErrorInd.......
debug shows TX> ...yadda-yadda...... but getting NO response (RX) from
switch..... VERY sure its not a wiring issue.......
My question is,... and I've tried in vain to find the answer on the
internet, is "What is the distance limitation on S/T type copper run?"
Thanks in
advance!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
Philip G. Virnoche CCNA
Network Engineer - AT&T Wireless
phone: 425.580.5239
cell: 206.601.3134
"HAM AND EGGS - A day's work for a chicken; A lifetime commitment for a
pig."
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