3-5
Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide
OL-5052-08
Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters
2-Port and 4-Port Channelized T3 SPA Overview
The 2-Port and 4-Port Channelized T3 SPA LEDs are described in Table 3-2.
2-Port and 4-Port Channelized T3 SPA Interface Specifications
The framer processes incoming and outgoing T3 frames (cbit, m13/m23, and unframe). The framer
operates at T3 line rates (44.2 Mbps).
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 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 SPA interface is compliant with ANSI and Telco standards. The interface also provides support
for Management Information Base (MIB) RFC 2495, RFC 2496, and T1.231.
2-Port and 4-Port Channelized T3 SPA Cables and Connectors
The interface connectors on the 2-Port and 4-Port Channelized T3 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 Channelized T3 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 )
1 C/A (Carrier/Alarm) LED 4 RX (Receive) connector
2 A/L (Active Loopback) LED 5 STATUS LED
3 TX (Transmit) connector
Table 3-2 2-Port and 4-Port Channelized T3 SPA LEDs
LED Label Color State Meaning
C/A Off Off Port is not enabled by software.
Green On Port is enabled by software, and there is a valid T3 signal
without any alarms.
Amber On Port is enabled by software, and there is at least one alarm.
A/L Off Off Port is not enabled by software.
Green On Port is enabled by software, loopback is off.
Amber On Port is enabled by software, loopback is on.
STATUS Off Off SPA power is off.
Amber On SPA power is on and good, and SPA is being configured.
Green On SPA is ready and operational.
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