[技术分享] Juniper网络公司T-系列模块之DWDM PIC 10 GE

Integrating optical transport technology into
routers enables the rapid rollout of new
services while providing superior operational
eficiency. Layer 3 intelligence ensures prompt
responses to topology changes, and extends
Dense Wavelength Division Multiplexing (DWDM)
capabilities to a router without requiring ixed
DWDM termination equipment. This allows
providers to offer on-demand services to their
customers.
The 10 GE DWDM Physical Interface Card (PIC)
uses a single tunable laser to access one of 45
possible ITU-grid wavelengths (over a maximum
distance of 80 Km) to achieve customized
compatibility with a multiplexed iber network.  
Wavelengths are conigured and reconigured
remotely through the JUNOS CLI, in response to
network dynamics.  Operators can dynamically
streamline trafic patterns and reallocate
wavelengths as bandwidth patterns change.  

10 Gigabit Ethernet (GE)  
DWDM PIC  
Product Description
DWDM continues to gain prominence in both metro and long haul networks with the
promise of providing greater channel density onto the same iber infrastructure. For
maximum beneit, the provisioning of DWDM has to be lexible. Operators have been
seeking ways to enhance the lexibility of wavelength services, and they want optical
bandwidth to be optimized for maximum revenue.
The Tunable 10 GE DWDM PIC is a Type 3 Physical Interface Card (PIC) supported on
the M320, T320, T640, and TX Matrix router platforms. It enables 1024 VLANs and
many other Ethernet features.
With this DWDM PIC, optical diagnostics are accessible through the JUNOS Command
Line Interface (CLI). Included are numerous alarms, which generate SYSLOGs, and
which can be trapped via Simple Network Management Protocol (SNMP).
Application in the Metro Network
Juniper M320, T320, T640, and TX Matrix platforms support DWDM with the addition
of the 10GE DWDM Physical Interface Card (PIC). The DWDM PIC implements tunable
optics technology, enabling customers to use the full ITU-grid by selecting from 45
different wavelengths (C-band with 100 GHz spacing). This is all conigurable through
the JUNOS CLI, and has a reach of up to 80 Km (49.6 miles).
The following diagram shows Juniper routers with the tunable 10 GE DWDM PIC
controlling optical wavelengths across optical transport equipment. The tunable 10
GE DWDM PICs connect to a ring via either the passive multiplexers of DWDM line
systems or on Reconigurable Optical Add/Drop Multiplexers (ROADMs)