Alcatel-Lucent 7705 SAR - Manual (Page 3)

Alcatel-Lucent 7705 SAR | Data Sheet 3
The Alcatel-Lucent 7705 SAR utilizes
extensive traffic management policies
to ensure fairness with detailed
classification and hierarchical schedul-
ing including minimum/maximum,
profiled, round robin and strict priority
scheduling and multi-tier policing to
differentiate and prioritize individual
services and flows.
Operations, administration
and maintenance
In order to ensure continuity of
services, the Alcatel-Lucent 7705 SAR
has a full set of operations, adminis-
tration and maintenance (OAM)
features including:
• LSP ping
• LSP traceroute
• Service distribution path (SDP) ping
¬ Verifies, for example, tunnel
connectivity and round trip delay
• Virtual circuit connectivity
verification (VCCV)
¬ Verifies, for example, service level
existence and round trip time
¬ Extends OAM to pseudowire
services
• Service Assurance Agent (SAA)
¬ Runs in background, periodically
collecting network “health” infor-
mation from OAM mecha nisms such
as VCCV and moni toring for prob-
lems such as SLA transgressions.
These features, when under the
control of the Alcatel-Lucent 5620
management portfolio, ensure rapid
fault detection as well as efficient
troubleshooting. In particular, SLAs
can be monitored, and transgressions
detected and reported via the SAA.
Synchronization
Cell sites rely on the backhaul network
to provide synchronous interfaces for
the proper delivery of data. In addition,
cell sites may rely on the network
interfaces as stable references with
which to derive radio frequencies (RFs)
and in order to ensure reliable subscriber
handover between cell towers.
The Alcatel-Lucent 7705 SAR supports
external reference timing, line timing
and adaptive timing in Release 1.0.
The adaptive timing is fully capable of
offering end-to-end synchronization.
In addition, the Alcatel-Lucent 7705
SAR is completely hardware-ready to
support IEEE1588v2. This IEEE standard
defines a method to minimize the
effects of delay and delay variation
(jitter). This is accomplished by a combi-
nation of built-in architectural features
and also powerful QoS mechanisms to
minimize the delay experienced by
synchronization traffic. This is a corner-
stone of the design of the Alcatel-Lucent
7705 SAR. A built-in Stratum-3 clock is
available in the control and switch module
to assist in synchro nization maintenance.
Features
• Cost-effective migration from E1/
T1-based backhaul to packet-based
transport, leveraging Ethernet ser-
vices over a wide range of first mile
media.
• Resiliency and redundancy including:
one-for-one hitless control and switch
module failover, synchronization re-
dundancy, network uplink resiliency
and redundancy of power feeds.
• Powerful, service-aware OAM
capabilities complemented by the
Alcatel-Lucent 5620 management
portfolio for GUI-based network
and element configuration, pro-
visioning, fault and performance
management.
• Dense adaptation of multiple con-
verged services onto an economical
packet infrastructure.
• Extends service routing IP/MPLS
capabilities to the cell site, hubs
and network edge in a compact
form factor.
• Dynamic tunnel signaling for scaling,
ease of establishment and resiliency.
Benefits
• Transition from PDH-based
connec tivity to Ethernet-based
can greatly reduce recurring
operating expenditures such
as line lease costs.
• Advanced resiliency features lead
to improved network uptime, which
can positively impact customer retention
and allow critical services to be
offered for increased revenue.
• Rapid fault detection and powerful
commissioning and troubleshooting
tools can improve productivity of
operations staff and reduce network
downtime.
• Multiprotocol and convergence
capabilities (with flexible and
granular QoS) reduce equipment
instances needed to carry multiple
fixed and mobile traffic streams.
• Modular, flexible architecture
alleviates the burden of complex
pre-engineering and future
scenario planning.