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The IPmux-24 TDM pseudowire access
gateway transparently delivers framed or unframed, E1 or T1
signals, HDLC-based data streams, and user LAN traffic over
packet-switched networks, via copper or fiber Fast Ethernet or
Gigabit Ethernet uplinks.
The IPmux-24 works opposite other pseudowire gateway units
in remote locations, or opposite the Gmux-2000 hub-site
pseudowire access gateway in central locations and POPs, to
converge voice and data traffic over packet transport while
maintaining first-rate service quality. Its compact design,
ease of installation, and advanced traffic management
capabilities enable carriers to extend their services from
legacy backbones over Greenfield packet networks without
affecting customer experience or replacing existing end-user
equipment. The IPmux-24 also allows service providers to add
traditional leased line services to their Layer 2 portfolio,
and permits enterprises to reduce their IT expenses on PSTN
connectivity and branch-to-branch communications. In addition,
it supports cellular operators in migrating their services to
economical packet-switched backhaul.
Advanced pseudowire functionality
Introducing RAD- s new generation of
ASIC processors, the IPmux-24 features enhanced pseudowire
(PW) performance with minimal processing delay, including
support for all standard TDM circuit emulation modes, such
as TDMoIP, CESoPSN, SAToP, and HDLCoPSN. A 64-pseudowire
capacity enables each timeslot to be assigned a
separately-configured pseudowire connection, thereby
supporting multiple PW flavors simultaneously. By grooming
DS0-level bundles, the IPmux-24 also facilitates an
efficient use of the expensive TDM ports.
Clock recovery and timing
The IPmux-24 TDM pseudowire access
gateway ensures end-to-end timing accuracy for real-time
services across non-deterministic packet networks. Featuring
adaptive clock recovery (ACR) capabilities, a remote
IPmux-24 can accurately regenerate an original clock
transmission in varying network load conditions. The
IPmux-24 conforms to ITU-T G.823/G.824 traffic and
synchronization interface requirements and to G.8261-defined
scenarios, providing low latency, attenuating delay
variations and enabling service resiliency. Such high
precision clocking attributes provide a frequency accuracy
level of 16 ppb, guaranteeing a smooth operation of 2G and
3G cellular equipment over PSNs.
Ethernet QoS capabilities
The IPmux-24 includes an internal
Ethernet bridge, operating in either VLAN-aware or
VLAN-unaware mode. VLAN stacking allows traffic separation
between different users or services, by defining a service
provider VLAN ID per customer or service. MEF 9 and MEF 14
certified, the IPmux-24 supports Ethernet private line (EPL)
service provisioning with enhanced traffic engineering and
CIR/CBS rate limitation features, thereby enabling service
providers to granularly adjust bandwidth to fit capacity
requirements. SLA enforcement and QoS guarantees are
supported by four strict priority queues, classified by VLAN
tags, per port 802.1p bits, IP Precedence, or ToS/DSCP bits.
OAM and diagnostics
The IPmux-24 incorporates a
pseudowire OAM mechanism that enables end-to-end monitoring
of the pseudowire link, performing connectivity verification
and round-trip delay measurements, as well as preventing
pseudowire configuration errors. Diagnostic loopbacks can be
remotely activated, while network condition statistics for
the LAN and IP layers are also monitored and stored by the
device. Performance monitoring parameters include packet
loss, packet mismatch and packet delay variation.
Management and security
The IPmux-24 can be managed locally
via an ASCII terminal, or remotely via Telnet/SSH, a Web
browser, or via the RADview service center. Centralized
authentication is performed by an on-board RADIUS client,
while secure Telnet and Web access is ensured by SSHv2 and
SSL protocols, respectively.
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