| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 2241.1 | | NETCAD::B_CRONIN | | Wed May 03 1995 10:17 | 5 |
|
Which LEDs are blinking? The front panel should be all M ports, and
no lights should be blinking (especially blinking green). For instance,
if the blinking lights are on the modpmd cards, is it the PHY LED or
the port LED (the one on then right).
|
| 2241.2 | It's a blinkin mystery ??? | MARIN::JONES | | Wed May 03 1995 14:02 | 14 |
|
All LED's on the top of the unit are green (3 of them) .. the M ports
are all off ... so that's it ... we've already had someone check out
the actual cabling running to faceplates from this unit .. it checks
out ok .. we have tried hooking up a system directly to the unit with
Digital Cat 5 supplied cable ... no joy ... the lights on the FDDI
card just keep blinkin .. !!
Any thoughts...
thanks
/Brian
|
| 2241.3 | | NETCAD::B_CRONIN | | Wed May 03 1995 15:45 | 27 |
|
I think that the lights on the NICs blink when they are not connected,
that explains some of my confusion. The concentrator's PHY lights are off
if there is no connection, and green if there is a completed
connection.
My next thought is that the patch cables may be wrong. There needs to
be an odd number of crossovers in the cable plant between the
NIC and the concentrator. Its possible that you are getting burned
by that. Pins 1 and 2 are the tranmitter, 7&8 are the receiver. There
needs to be an odd number of crossovers in the cable plant to get the
two ends to see each other.
Try this: Gather up the two patch cables used in this link. Connect
together 2 M ports of the concentrator using each patch cable. If the
PHY lights of the ports blink orange, indicating that the M to
M connection is being rejected, the cable has a crossover in it.
If the cable does not have a crossover, no lights will light up
(as the receiver doesn't see the transmitter). Once you know how many
patch cables have crossovers, make sure that the cable plant matches
the number you need to get an odd number of crossovers.
|
| 2241.4 | No lights .. no action ! | MARIN::JONES | | Wed May 03 1995 16:25 | 10 |
| Gettin no lights what so ever when I connect to M ports up with the
patch cable ... RJ45 .. 8 wires, according to defta-ua manual, pins
1 & 2 are RX+,RX- respectively, and 3,6 are TX+,TX- respectively ...
Looking at this Cat 5 cable I have , the wires are straight thru with
no cross overing from what I can see going by the coloring...
Is this the problem ...?????????
/Brian
|
| 2241.5 | | NETCAD::B_CRONIN | | Thu May 04 1995 10:17 | 10 |
|
Yes, it looks like you may have patch cablkes that do not make any
connection. If the cables are straight thru, that is the problem.
You will need 1 crossover cable, and 1 straight through cable,
assuming (as is usually the case) the cable plant is a straight
through connection.
Sorry, I don't remember the number of the crossover cable, but I'm
pretty sure we sell it by now.
|
| 2241.6 | Is that so...~~!!\ | MARIN::JONES | | Thu May 04 1995 16:18 | 3 |
| Thanks ... I'll try and get hold of a BN25H cable then...
/Brian
|
| 2241.7 | The defta Manual is incorrect. | NPSS::BUZYNSKI | | Fri May 05 1995 07:14 | 10 |
| The correct cable to use is the BN25H-03. The DEFTA manual (figure B-2)
is incorrect. The RJ45 pin assignments are:
Pin Assignment
------------------------
1 TX+
2 TX-
7 RX+
8 RX-
|