Token Ring and FRAD Bridge/Router Installation Manual

Connectors and Cables 2-7
STP Connector and Cable
The following figure shows the pinouts of the STP connector (DB-9).
The connector bodies connect the cable shield to chassis ground.
Table 2-2 lists cable types, multistation access units (MAUs), and
emissions classes compatible with the STP connector.
*Shielding of all cable types should be terminated 360 degrees at the cable plug.
†All UTP compliance testing was accomplished using cables built with Stewart Connector Co.
connector, part number 940 SP-36-08-08.
*Shielding of all cable types should be terminated 360 degrees at the cable plug.
Table 2-2 UTP Cable Types, MAUs, and Emissions Compliance
MAUs Emissions Compliance
*
Cable Type Passive
Active
Retimed
FCC and
VCCI Class A
EN55022 and
VDE Class B
UTP
†
100 ohm:
Category 3 no yes yes no
Category 4 yes yes yes no
Category 5 yes yes yes no
Shielded
UTP
†
100 ohm:
Category 3 no yes yes yes
Category 4 yes yes yes yes
Category 5 yes yes yes yes
Table 2-3 STP Cable Types, MAUs, and Emissions Compliance
MAUs Emissions Compliance
*
Cable Type Passive
Active
Retimed
FCC and
VCCI Class A
EN55022 and
VDE Class B
STP 150 ohm:
IBM Type 1 yes yes yes yes
IBM Type 6 yes yes yes yes
5
9876
43 21
STP
1 RX
2 GND
3 +5 V
4 GND
5 TX
6 RX
7 GND
8 GND
9 TX
DB-9 female (shielded)
SS2TRHWBook Page 7 Monday, May 5, 1997 3:11 PM