Cisco XR 12000 Series User Manual
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Cisco XR 12000 Series Router SIP and SPA Hardware Installation Guide
OL-17438-04
Chapter 2 Overview: Cisco XR 12000 Series Router Shared Port Adapters
2-Port and 4-Port Channelized T3 to DS0 SPA Overview
The 2-Port and 4-Port Channelized T3 SPA LEDs are described in
.
2-Port and 4-Port Channelized T3 SPA Interface Specifications
The framer processes incoming and outgoing T3 frames (cbit, m13/m23, and unframe) and E3 (g751,
g832) frames. The framer operates at T3/E3 line rates (44.2 44.736/34.368 Mbps) depending on the
mode in which it is configured.
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 2495, RFC 2496, and T1.231.
Note
The 2-Port and 4-Port Channelized T3 SPA supports Frame Relay Fragmentation (FRF.12) and Multilink
Fame Relay (MFR) features for Cisco IOS XR Software Release 3.6.0 and later releases.
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
connectors 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)
Table 2-5
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 E3 or 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.
Green
On
SPA is ready and operational.
Amber
On
SPA power is on and good, and SPA is being configured.