3-8
Catalyst 6500 Series Switch SIP, SSC, and SPA Hardware Installation Guide
OL-9041-04
Chapter 3 Catalyst 6500 Series Switch SPA Overview
8-Port Channelized T1/E1 SPA Overview
Packet data is transported with a user-configurable encapsulation (such as Point-to-Point Protocol [PPP]
or High-Level Data Link Control [HDLC]), and is mapped to T3 and E3 frames. The encapsulations add
transport overhead to the packet of data frames before transporting, and are stripped when a packet is
transported to the far end.
The T3/E3 SPA interface is compliant with ANSI and Telco standards. The interface also provides
support for Management Information Base (MIB) (RFC 2496) and T1.231.
2-Port and 4-Port Clear Channel T3/E3 SPA Cables and Connectors
The interface connectors on the 2-Port and 4-Port Clear Channel T3/E3 SPA are 75-ohm coaxial Siemax
types, with one connector and cable for transmit (TX) and one for receive (RX).
The following cables can be used with the 2-Port and 4-Port Clear Channel T3/E3 SPA. The cables have
BNC on one end and the Siemax connectors on the other.
• CAB-T3E3-RF-BNC-M (T3 or E3 Cable, 1.0/2.3 RF to BNC-Male, 10 Feet )
• CAB-T3E3-RF-BNC-F(T3 or E3 Cable, 1.0/2.3 RF to BNC-Female, 10 Feet )
• CAB-T3E3-RF-OPEN (T3 or E3 Cable, 1.0/2.3 RF to BNC-Open end, 10 Feet )
Note The Cisco cable part numbers are 72-4124-01 ( with male BNC end) and 72-4131-01 (with female BNC
end).
Figure 3-2 shows the connectors on the 4-Port Clear Channel T3/E3 SPA, and Table 3-6 describes the
signal descriptions for these connectors.
8-Port Channelized T1/E1 SPA Overview
The following sections describe the 8-Port Channelized T1/E1 SPA:
• 8-Port Channelized T1/E1 SPA LEDs, page 3-9
• 8-Port Channelized T1/E1 SPA Interface Specifications, page 3-9
• 8-Port Channelized T1/E1 SPA Cables, Connectors, and Pinouts, page 3-10
Ta b l e 3-6 2-Port and 4-Port Clear Channel T3/E3 SPA Connectors
Connector Label Meaning
TX Transmitted signals appear on the center contact, and the outer shield is ground
for the 75-ohm RG-59 coaxial cable you attach to the TX BNC connector.
RX Received signals appear on the center contact, and the outer shield is ground for
the 75-ohm RG-59 coaxial cable you attach to the RX BNC connector.
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