user manual
Table Of Contents
- Cisco ONS 15454 SDH Reference Manual
- Contents
- About this Guide
- Shelf and FMEC Hardware
- Common Control Cards
- Electrical Cards
- Optical Cards
- Ethernet Cards
- Storage Access Networking Cards
- Card Protection
- Cisco Transport Controller Operation
- Security and Timing
- Circuits and Tunnels
- SDH Topologies and Upgrades
- CTC Network Connectivity
- Alarm Monitoring and Management
- Ethernet Operation
- Hardware Specifications
- A.1 Shelf Specifications
- A.2 SFP Specifications
- A.3 General Card Specifications
- A.4 Common Control Card Specifications
- A.5 Electrical Card and FMEC Specifications
- A.5.1 E1-N-14 Card Specifications
- A.5.2 E1-42 Card Specifications
- A.5.3 E3-12 Card Specifications
- A.5.4 DS3i-N-12 Card Specifications
- A.5.5 STM1E-12 Card Specifications
- A.5.6 BLANK Card
- A.5.7 FMEC-E1 Specifications
- A.5.8 FMEC-DS1/E1 Card Specifications
- A.5.9 FMEC E1-120NP Card Specifications
- A.5.10 FMEC E1-120PROA Card Specifications
- A.5.11 FMEC E1-120PROB Card Specifications
- A.5.12 E1-75/120 Impedance Conversion Panel Specifications
- A.5.13 FMEC-E3/DS3 Card Specifications
- A.5.14 FMEC STM1E 1:1 Card Specifications
- A.5.15 FMEC-BLANK Card Specifications
- A.5.16 MIC-A/P Card Specifications
- A.5.17 MIC-C/T/P Card Specifications
- A.6 Optical Card Specifications
- A.6.1 OC3 IR 4/STM1 SH 1310 Card Specifications
- A.6.2 OC3 IR/STM1 SH 1310-8 Card Specifications
- A.6.3 OC12 IR/STM4 SH 1310 Card Specifications
- A.6.4 OC12 LR/STM4 LH 1310 Card Specifications
- A.6.5 OC12 LR/STM4 LH 1550 Card Specifications
- A.6.6 OC12 IR/STM4 SH 1310-4 Card Specifications
- A.6.7 OC48 IR/STM16 SH AS 1310 Card Specifications
- A.6.8 OC48 LR/STM16 LH AS 1550 Card Specifications
- A.6.9 OC48 ELR/STM16 EH 100 GHz Card Specifications
- A.6.10 OC192 SR/STM64 IO 1310 Card Specifications
- A.6.11 OC192 IR/STM64 SH 1550 Card Specifications
- A.6.12 OC192 LR/STM64 LH 1550 Card Specifications
- A.6.13 OC192 LR/STM64 LH ITU 15xx.xx Card Specifications
- A.7 Ethernet Card Specifications
- A.8 Storage Access Networking Card Specifications
- Administrative and Service States
- Network Element Defaults
- Index

7-5
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 7 Card Protection
7.4 External Switching Commands
Figure 7-3 ONS 15454 SDH Cards in an Unprotected Configuration
7.4 External Switching Commands
The external switching commands on the ONS 15454 SDH are Manual, Force, and Lock out. If you
choose a Manual switch, the command will switch traffic only if the path has an error rate less than the
signal degrade (SD) bit error rate threshold. A Force switch will switch traffic even if the path has SD
or signal fail (SF) conditions; however, a Force switch will not override an SF on a 1+1 protection
channel. A Force switch has a higher priority than a Manual switch. Lock outs, which prevent traffic
from switching to the protect port under any circumstance, can only be applied to protect cards (in 1+1
configurations) . Lockouts have the highest priority.
Note Force and Manual switches do not apply to 1:1 protection groups; these ports have a single switch
command.
Another way to inhibit protection switching in a 1+1 configuration is to apply a lock on to the working
port. A working port with a lock on applied cannot switch traffic to the protect port in the protection
group (pair). In 1:1 protection groups, working or protect ports can have a lock on.
Unprotected
83627
FMEC
FMEC
FMEC
FMEC
FMEC
MIC-A/P
MIC-T/C/P
FMEC
FMEC
FMEC
FMEC
FMEC
Timing, Comm., and Control
Cross Connect
Cross Connect
Timing, Comm., and Control
Working
Working (not electric)
Working
Working
Working
Working (not electric)
Working
Working
Working
Working
Working
Working
AIC-I (optional)
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