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CONFIGURING 3COM 3C507 AND 3C507TP NIC SEPT 11, 1992 [REV. JAN 22, 1993]
LAN SUPPORT TUTORIAL #3 PAGE 5
Configure Card (or TPAU) for 10BASE-T or Draft D
You cannot correctly configure the 3C507TP or a TPAU without knowing your LAN's hub
type and the operating mode of that hub. A misconfigured card may appear to work but
there's no guarantee that it will work consistently -- or that it won't wreak havoc on your
LAN: such connectivity hardware configured incorrectly can "flood" the LAN and severely
disrupt local communications.
Your Telecom representative will be able to tell you the hub type and the 10BASE-T version,
or you can try to guess by checking the TPAU on a neighboring workstation: if it's an old
ASP300 -- the kind with only one switch -- then your subnet can only be Draft D and link-
integrity cannot be enabled on the TPAU. (The ASP300 has only one switch, which should
always be down.) It's best, however, to consult with your Telecom representative for a
definitive answer. When you have the information, set the jumpers on the 3C507TP for
10BASE-T or Draft D using the settings in the table below. Or set the switches on the
Ungermann-Bass TPAU that you'll connect to the 3C507.
SWITCH SETTINGS FOR ASP300
The Ungermann-Bass ASP300 TPAU has only one setting, which is for the SQE (signal
quality error) test feature. This setting should always be down in order to disable that
feature.
SWITCH SETTINGS FOR UNGERMANN-BASS ASP310 AND ASP320 TPAUS FOR USE WITH 3C507 CARD
Hub model: U-B ASM300 U-B ASM310 U-B ASM320 AT&T StarLAN AT&T StarLAN 10
Ethernet version: Draft D 10BaseT Draft D 10BaseT Draft D 10BaseT Pre-10BT 10BaseT Pre-10BT 10BaseT
1 SQE Test B (down) na B (down) B (down) B (down) B (down) B (down) na B (down) B (down)
2 Receive Threshold
(RX TH)
B (down) na B (down) A (up) B (down) A (up) A (up) na A (up) A (up)
3 Link Test A (up) na A (up) B (down) A (up) B (down) A (up) na A (up) B (down)
JUMPER SETTINGS FOR 3C507TP
Hub model: U-B ASM300 U-B ASM310 U-B ASM320 AT&T StarLAN AT&T StarLAN 10
Ethernet
version:
Draft D 10BaseT Draft D 10Baset Draft D 10BaseT Pre-10BT 10BaseT Pre-10BT 10BaseT
J1 DC Sig off na off off off off off na off off
J2 Link beat off na off on off on off na off` on
J3 RX TH low na low norm low norm norm na norm norm
J4 Eq off na off off off off off na off off
J6 Xmit norm na norm norm norm norm norm na norm norm
J7 Impedance 100
ohms
na 100
ohms
100
ohms
100
ohms
100
ohms
100
ohms
na 100
ohms
100
ohms