Manualshelf

Specifications

ManualsBrandsCisco ManualsNetworkingCX-FEIP-2TX= Installation and con?guration
271272273274275276277278279280
7-23
Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 7 Card Provisioning
Provisioning Optical Cards
Click Apply.
7.3.2 Provisioning OC-N Cards for SDH
You can provision the ONS 15454 OC-3, OC-12, and OC-48 cards to support either SONET or SDH
over SONET signals. When provisioned for SDH, each OC-N port drops and inserts STM traffic in
unprotected or 1+1 protection mode. Each STM-1 signal is mapped as a 155 Mbps concatenated signal
(STS-3c) for transparent transport over a SONET network. The original STM-1 traffic may be handed
off as an STM-1 or OC-3.
Because SDH and SONET frame format and size are nearly identical, their line speeds meet, starting at
155 Mbps. For example, at the STM-1/OC-3 level, the ONS 15454 performs section and line overhead
conversions and maps the 261x9 byte VC-4 into an STS-3c for transparent transport across the SONET
domain. At the far end, the STS-3c carrying the original VC-4 is remapped into an STM-1 for handoff
to an SDH network element (node). Table 7-9 shows the SDH over SONET mapping for the ONS 15454
OC-N cards.
PSD-S
Protection Switching Duration -
Span
BLSR is not supported on the
OC-3 card; therefore, the PSD-W,
PSD-S, and PSD-R PMs do not
increment.
Numeric. Defaults (15 min/1 day):
Line
• 0/0 (all OC-N cards except OC-3, Near and
Far End)
PSC-R
Protection Switching Duration -
Ring
BLSR is not supported on the
OC-3 card; therefore, the PSC-W,
PSC-S, and PSC-R PMs do not
increment.
Numeric. Defaults (15 min/1 day):
Line
• 0/0 (all OC-N cards except OC-3, Near and
Far End)
PSD-R
Protection Switching Duration -
Ring
BLSR is not supported on the
OC-3 card; therefore, the PSD-W,
PSD-S, and PSD-R PMs do not
increment.
Numeric. Defaults (15 min/1 day):
Line
• 0/0 (all OC-N cards except OC-3, Near and
Far End)
Table 7-8 OC-N Card Threshold Settings on the Provisioning > Thresholds Tab (continued)
Heading Description Options
Table 7-9 OC-N – SDH Over SONET Mapping
Card SDH SDH over SONET
OC-3 STM-1 STS-3c
OC-12 STM-4 STS-12c
OC-48 STM-16 STS-48c
OC-192 STM-64 STS-192c