Enterasys X-Pedition 8000/8600 Getting Started Guide 119
SSR-HTX22-08-AA and SSR-HTX12-08-AA
SSR-HTX22-08-AA and SSR-HTX12-08-AA
Cabling and Connector Specifications
The following table lists the media specifications for the SSR-HTX22-08-AA line card.
Connectivity Guidelines
To attach the segment cables to your SSR-HTX22-08-AA or SSR-HTX12-08-AA line card:
1. For all the 10/100-Mbps ports, obtain copper cables that have the following pin assignments.
The RJ-45 connectors on the SSR-HTX22-08-AA and SSR-HTX12-08-AA line cards are
configured as Media Data Interface Crossed (MDIX). You can use Category 3 (“Cat-3”) or
higher wire for 10-Mbps segments. For 100-Mbps segments, use Cat-5 or higher wire. The
ports automatically sense which type of segment they are connected to and configure
themselves to transmit and receive at the appropriate bandwidth.
The following table lists the pin assignments for the RJ-45 connector on the SSR-HTX22-08-
AA and SSR-HTX12-08-AA, and for the RJ-45 connector on the switch, router, or host on the
other end of the segment cable.
Table 46. SSR-HTX22-08-AA Media Specifications
Port Type Specification
10BASE-T • 802.3 standard
• RJ-45 connector wired as Media Data Interface Crossed (MDIX); see
Figure 39 on page120 for pin assignments
• EIA Category 3, 4, or 5 unshielded twisted pair cabling
• Maximum 100 meters (328 feet) segment length
100BASE-TX • 802.3u standard
• RJ-45 connector wired as Media Data Interface Crossed (MDIX); see
Figure 39 on page120 for pin assignments
• EIA Category 5 unshielded twisted pair cabling
• Maximum 100 meters (328 feet) segment length
Table 47. RJ-45 Connector Pin Assignments
Line Card RJ-45 Connector Pin Number RJ-45 Connector at Other End of Segment
RXD (receive data) 1 TXD (transmit data)
RXD (receive data) 2 TXD (transmit data)
TXD (transmit data) 3 RXD (receive data)
Unused 4 Unused
Unused 5 Unused