RE: [10GBASE-CX4] Cable / Connector pinout
Howard,
Good catch.
S1-2(end "A") connects to S15-16 (end "B"), S3-4(end "A") connects to S13-14
(end "B"), etc. for an IB cable assembly.
With this pin mapping, connector NEXT from a transmitter to a receiver is
worst case at the S9-10 (xmit) to S7-8 (receive) boundary.
Jim Nadolny
FCI
-----Original Message-----
From: Howard A. Baumer [mailto:hbaumer@broadcom.com]
Sent: Tuesday, December 10, 2002 11:44 AM
To: 10GBASE-CX4 (E-mail)
Subject: [10GBASE-CX4] Cable / Connector pinout
All,
I just noticed that the connections for the Cable assemblies we have
been dealing with do not match the connections in the IB specification.
Here is what I have determined:
IB IB Cable
Pin Signal Signal Difference
S1 IBtxIp(3) IBtxIp(0) X
S2 IBtxIn(3) IBtxIn(0) X
S3 IBtxIp(2) IBtxIp(1) X
S4 IBtxIn(2) IBtxIn(1) X
S5 IBtxIp(1) IBtxIp(2) X
S6 IBtxIn(1) IBtxIn(2) X
S7 IBtxIp(0) IBtxIp(3) X
S8 IBtxIn(0) IBtxIn(3) X
S9 IBtxOn(3) IBtxOn(3)
S10 IBtxOp(3) IBtxOp(3)
S11 IBtxOn(2) IBtxOn(2)
S12 IBtxOp(2) IBtxOp(2)
S13 IBtxOn(1) IBtxOn(1)
S14 IBtxOp(1) IBtxOp(1)
S15 IBtxOn(0) IBtxOn(0)
S16 IBtxOp(0) IBtxOp(0)
The Cables IBtxI lane order is reversed from the IB Specification. I am
looking at "InfiniBand Architecture Release 1.0 Volume 2 - Physical
Specifications" page 160 & 161, table 24.
Howard Baumer