3-3
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Hardware Installation Guide
OL-14126-03
Chapter 3 Overview: Cisco ASR 1000 Series Aggregation Services Routers Shared Port Adapters
2-Port and 4-Port Clear Channel T3/E3 Serial SPA Overview
2-Port and 4-Port T3/E3 Clear Channel Serial SPA Interface Specifications
The framer processes incoming and outgoing T3 (cbit, m13/m23, and unframe) and E3 (g751, g832, and
unframe) frames. The framer operates at T3/E3 line rates (44.736Mbps /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 2496 and T1.231.
2-Port and 4-Port T3/E3 Clear Channel Serial SPA Cables and Connectors
The interface connectors on the 2-Port and 4-Port T3/E3 Clear Channel Serial 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 T3/E3 Clear Channel Serial 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)
Note
The Cisco cable part numbers are 72-4124-01 (with male BNC end) and 72-4131-01 (with female BNC
end).
shows the connectors on the 4-Port T3/E3 Clear Channel Serial SPA, and
describes
the signal descriptions for these connectors.
Table 3-1
2-Port and 4-Port T3/E3 Clear Channel Serial 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, and loopback is off.
Amber
On
Port is enabled by software, and 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 the SPA is being configured.