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Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 2 Common Control Cards
2.3.1 TCC2P Functionality
2.3.1 TCC2P Functionality
The TCC2P card supports multichannel, high-level data link control (HDLC) processing for the DCC.
Up to 84 DCCs can be routed over the TCC2P card and up to 84 section DCCs can be terminated at the
TCC2P card (subject to the available optical digital communication channels). The TCC2P selects and
processes 84 DCCs to facilitate remote system management interfaces.
The TCC2P card also originates and terminates a cell bus carried over the module. The cell bus supports
links between any two cards in the node, 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 TCC2P card nonvolatile memory,
which allows quick recovery in the event of a power or card failure.
The TCC2P card performs all system-timing functions for each ONS 15454. The TCC2P card monitors
the recovered clocks from each traffic card and two BITS ports for frequency accuracy. The TCC2P card
selects a recovered clock, a BITS, or an internal Stratum 3 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 TCC2P card to synchronize with the recovered clock, which provides holdover if the
reference is lost.
The TCC2P card supports 64/8K composite clock and 6.312 MHz timing output.
The TCC2P card monitors both supply voltage inputs on the shelf. An alarm is generated if one of the
supply voltage inputs has a voltage out of the specified range.
Install TCC2P cards in Slots 7 and 11 for redundancy. If the active TCC2P card fails, traffic switches to
the protect TCC2P card. All TCC2P card protection switches conform to protection switching standards
when the bit error rate (BER) counts are not in excess of 1 * 10 exp – 3 and completion time is less than
50 ms.
The TCC2P card has two built-in Ethernet interface ports for accessing the system: one built-in RJ-45
port on the front faceplate for on-site craft access and a second port on the backplane. The rear Ethernet
interface is for permanent LAN access and all remote access via TCP/IP as well as for Operations
Support System (OSS) access. The front and rear Ethernet interfaces can be provisioned with different
IP addresses using CTC.
Two EIA/TIA-232 serial ports, one on the faceplate and a second on the backplane, allow for craft
interface in TL1 mode.
Note To use the serial port craft interface wire-wrap pins on the backplane, the DTR signal line on the
backplane port wire-wrap pin must be connected and active.
2.3.2 Redundant TCC2P Card Installation
Cisco does not support operation of the ONS 15454 with only one TCC2P card. For full functionality
and to safeguard your system, always operate with two TCC2P cards.
When a second TCC2P card is inserted into a node, it synchronizes its software, its backup software, and
its database with the active TCC2P card. If the software version of the new TCC2P card does not match
the version on the active TCC2P card, the newly inserted TCC2P card copies from the active TCC2P
card, taking about 15 to 20 minutes to complete. If the backup software version on the new TCC2P card
does not match the version on the active TCC2P card, the newly inserted TCC2P card copies the backup
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