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Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide
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Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters
2-Port Channelized T3/E3 ATM CEoP SPA
2-Port Channelized T3/E3 ATM CEoP SPA Interface Specifications
The framer processes incoming and outgoing T3 (cbit, m13/m23, and unframed) and E3 (g751, g832,
and unframed) frames. The framer operates at T3 or E3 line rates (44.736 or 34.368 Mbps) depending
on the mode in which it is configured.
Note
For Cisco IOS Release 12.2(33)SRC, the 2-Port Channelized T3/E3 ATM CEoP SPA supports T3 ATM
only. E3 ATM is not supported.
T3/E3 data is encapsulated and sent across the MPLS network over user-configurable pseudowires.
In ATM mode, data is encapsulated into ATM cells and transported across the network. In circuit
emulation (CEM) mode, channelized data is encapsulated in structured mode using the Circuit
Emulation Services over Packet Switched Network (CESoPSN) format, and unchannelized data is
encapsulated in unstructured mode using Structure-Agnostic TDM over Packet (SAToP) format.
The encapsulation adds transport overhead to the CEM frames or ATM cells before transport and
removes the overhead at 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.
2-Port Channelized T3/E3 ATM CEoP SPA Cables and Connectors
The interface connectors on the 2-Port Channelized T3/E3 ATM CEoP 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 Channelized T3/E3 ATM CEoP SPA. The cables have
BNC connectors on one end and the Siemax connectors on the other. If similar SPAs are connected
back-to-back, both ends of cable will be Siemax.
•
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).
•
The SPA can receive data over the cable up to a maximum distance of 1350 ft (411.5 meters).
shows the connectors on the 2-Port Channelized T3/E3 ATM CEoP SPA, and
describes the signal descriptions for these connectors.
Table 3-43
2-Port Channelized T3/E3 ATM CEoP 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 Siemax 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 Siemax connector.
