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2.3.1 TCC2P Functionality
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 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 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.
When using the LAN RJ-45 craft interface or back panel wirewrap LAN connection, the connection must
Note
be 10BASE T, half duplex. Full duplex and autonegotiate settings should not be used because they might
result in a loss of visibility to the node.
Cisco does not support operation of the ONS 15454 with only one TCC2P card. For full functionality
Note
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
Note
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
software from the active TCC2P card again, taking about 15 to 20 minutes. Copying the database from
the active TCC2P card takes about 3 minutes. Depending on the software version and backup version the
new TCC2P card started with, the entire process can take between 3 and 40 minutes.
2.3.1.1 System Timing Functions
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 (BITS_IN_A and BITS_IN-B) for
frequency accuracy. The TCC2P card selects a recovered clock, a BITS clock, or an internal Stratum 3
Cisco ONS 15454 Reference Manual, R8.5
2-12
Chapter 2
Common Control Cards
78-18106-01
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