Specifications

5
Cisco ONS 15327 Product Overview, R3.3
June 2002
Cisco ONS 15327 Product Overview
Cards and Card Slots
• SONET data communications channel (DCC) termination
• System fault detection
• Cross-connect maintenance and management
The CRIT, MAJ, MIN, and REM alarm LEDs on the XTC faceplate indicate
whether a Critical, Major, Minor, or Remote alarm is present anywhere on the
ONS 15327 or on a remote node in the network.
The XTC card establishes connections and performs time-division switching
(TDS) at the STS-1 level between ONS 15327 traffic cards. You can concentrate
or groom low-speed traffic from line cards onto high-speed transport spans and
drop low-speed traffic from transport spans onto line cards. The XTC cards
provide performance monitoring and protection switching and support STS and
VT-level grooming. Slots 5 and 6 are the XTC slots.
In-Service Upgrade
The node name, configuration database, IP address, and system software are
stored in the XTC card's non-volatile memory, which allows quick recovery if
power or card failures occur. You can upgrade system software without affecting
traffic on the ONS 15327 if dual XTC cards are used. The upgrade takes place first
on the standby XTC card. The system verifies that the upgrade is successful and
switches from the active XTC card running the older release to the upgraded
standby XTC card running the newer release. After the switch, the second XTC
card undergoes the upgrade. The XTC then loads new software to each line card
one at a time. This process is automatic once the cards are inserted.