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

10-12
Cisco ONS 15454 SDH Reference Manual, R5.0
April 2008
Chapter 10 Circuits and Tunnels
10.5 Multiple Destinations for Unidirectional Circuits
10.5 Multiple Destinations for Unidirectional Circuits
Unidirectional circuits can have multiple destinations for use in broadcast circuit schemes. In broadcast
scenarios, one source transmits traffic to multiple destinations, but traffic is not returned back to the
source. When you create a unidirectional circuit, the card that does not have its backplane receive (Rx)
input terminated with a valid input signal generates a loss of signal (LOS) alarm. To mask the alarm,
create an alarm profile suppressing the LOS alarm and apply it to the port that does not have its Rx input
terminated.
10.6 Monitor Circuits
Monitor circuits are secondary circuits that monitor traffic on primary bidirectional circuits. Monitor
circuits can be created on E1 or STM-N cards. Figure 10-4 shows an example of a monitor circuit. At
Node 1, a VC4 is dropped from Port 1 of an STM-1 card. To monitor the VC4 traffic, test equipment is
plugged into Port 2 of the STM-1 card and a monitor circuit to Port 2 is provisioned in CTC. Circuit
monitors are one-way. The monitor circuit in Figure 10-4 is used to monitor VC4 traffic received by
Port 1 of the STM-1 card.
Figure 10-4 VC4 Monitor Circuit Received at an STM-1 Port
Note Monitor circuits cannot be used with Ethernet circuits.
10.7 SNCP Circuits
Use the Edit Circuits window to change SNCP selectors and switch protection paths. In the SNCP
Selectors subtab on the Edit Circuits window, you can:
• View the SNCP circuit’s working and protection paths.
• Edit the reversion time.
• Set the hold-off timer.
• Edit the Signal Fail (SF)/Signal Degrade (SD) bit error rate (BER) thresholds.
Note In the SNCP Selectors tab, the SF Ber Level and SD Ber Level columns display “N/A” for those nodes
that do not support VC low-order signal BER monitoring. In Software Release 5.0, only the
Cisco ONS 15310-CL supports VC low-order signal BER monitoring.
STM-1
STM-N
XC
ONS 15454 SDH
Node 1
STM-N STM-N
XC
ONS 15454 SDH
Node 2
VC4 Drop
VC4 Monitor
Test Set
Port 1
Port 2
Class 5
Switch
71678