Installing ONS 15454 SDH TCC-I Cards
Product Name: 15454E-TCC-I=
This document contains a description of TCC-I card features, installation procedures, removal
instructions, and technical specifications. Use this document in conjunction with the Cisco ONS 15454
SDH Installation and Operations Guide and the Cisco ONS 15454 SDH Troubleshooting and Reference
Guide when working with TCC-I cards.
This document contains the following sections:
• “TCC-I Timing Communication and Control Card Description” section on page 2
• “TCC-I Card Specifications” section on page 5
• “Installation Procedures” section on page 6
• “Removal Procedures” section on page 7
• “Related Documentation” section on page 9
• “Obtaining Documentation and Submitting a Service Request” section on page 10
This document contains the following procedures:
“Installation Procedures” procedure on page 6
“Card Turn Up” procedure on page 7
“Verify Successful Turn Up of the TCC-I Card” procedure on page 7
“Removal Procedures” procedure on page 7
“Initiate a Software Reset” procedure on page 8
Note For information about circuits and card capacities, see the Cisco ONS 15454 SDH Installation and
Operations Guide.
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Copyright © 2002. Cisco Systems, Inc. All rights reserved.
TCC-I Timing Communication and Control Card Description
TCC-I Timing Communication and Control Card Description
The TCC-I performs system initialization, provisioning, alarm reporting, maintenance, diagnostics, IP
address detection/resolution, SDH SOH Data Communications Channel (DCC) termination, and system
fault detection for the ONS 15454 SDH. The TCC-I also ensures that the system maintains Stratum 3 E
(G.813) timing requirements. Figure 1 shows the TCC-I faceplate and Figure 2 shows a block diagram
of the card.
Figure 1 TCC-I faceplate
TCC-I
FAIL
ACT/STBY
CRIT
MAJ
MIN
REM
SYNC
ACO
ACO
ASYNC
LAN
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Figure 2 TCC-I block diagram
TCC-I Timing Communication and Control Card Description
Timing
Controller
Framer/
TDM
Crossconnect
LIU
RAM
Message
Router
FlashRAM
Flash
DCC
Processor
Control
Processor
TDM/SCC Mux
10BaseT
Modem
Ethernet
Hub
10BaseT
Craft
B
a
c
k
p
l
a
n
e
TCC-I Functionality
The TCC-I supports multichannel, high-level data link control (HDLC) processing for the DCC. Up to
48 DCCs can be routed over the TCC-I and up to ten DCCs can be terminated at the TCC-I (subject to
available optical digital communication channels). The TCC-I selects and processes ten DCCs to
facilitate remote system management interfaces.
The TCC-I also originates and terminates a cell bus carried over the module. The cell bus supports links
between any two cards in the system, which is essential for peer-to-peer communication. Peer-to-peer
communication accelerates protection switching for redundant cards.
The node database, IP address, and system software are stored in TCC-I non-volatile memory, which
allows quick recovery in the event of a power or card failure.
The TCC-I performs all system-timing functions for each ONS 15454 SDH. The TCC-I monitors the
recovered clocks from each traffic card and two BITS ports for frequency accuracy. The TCC-I selects
a recovered clock, a BITS or an internal Stratum 3 E reference as the system-timing reference. You can
provision any of the clock inputs as primary or secondary timing sources. A slow-reference tracking loop
allows the TCC-I to synchronize with the recovered clock, which provides holdover if the reference is
lost.
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