IPmux-24
TDM Pseudowire Access Gateway
IP networks – outgoing pseudowire
packets are marked for priority using
DSCP, ToS, or Diffserv bits.
MPLS networks – outgoing pseudowire
packets are assigned to a specific MPLS
tunnel and marked for priority using EXP
bits.
PSEUDOWIRE TIMING
End-to-end synchronization between
circuits is maintained by deploying
advanced clock recovery mechanisms.
Clock recovery conforms to G.823 and
G.824 traffic interface using
G.8261-defined scenarios.
Advanced clock recovery conforms to
G.823 synchronization interface using
G.8261-defined scenarios and achieves
16 ppb clock accuracy.
The system clock ensures a single clock
source for all TDM links. The system clock
uses master and fallback timing sources
for clock redundancy. IPmux-24 also
provides system clock input and output via
an optional external clock port.
TDM INTERFACE
One, two or four E1 or T1 ports provide
connectivity to any standard E1 or T1
device.
The E1 and T1 interfaces support:
• Integral LTU/CSU for long haul
applications
• G.703 unframed and G.704 framed
modes
• CAS and CRC-4 bit generation (E1)
• D4/SF and ESF framing (T1)
• Robbed bit (T1).
ETHERNET INTERFACE
IPmux-24 provides the following Ethernet
ports:
• One network port
• One network/user port
• One user port.
The Ethernet ports accept a wide range of
Gigabit and Fast Ethernet SFP-based fiber
optic interfaces. One or two ports can be
ordered with built-in 10/100BaseT
interfaces.
The unit can also be ordered with Fast
Ethernet interface only.
ETHERNET CAPABILITIES
IPmux-24 features an internal bridge,
operating in VLAN-aware and
VLAN-unaware modes.
VLAN stacking can be used for traffic
separation between different users or
services, by defining a service provider
VLAN ID per customer or service. When
VLAN stacking is used, a service provider
VLAN tag is added to the user traffic and
removed from network traffic. Both
service provider VLAN ID and service
provider VLAN priority can be defined.
IPmux-24 provides four priority queues for
each port or pseudowire traffic. User traffic
can be prioritized according to the VLAN
priority, DSCP, IP Precedence or per port basis.
Ingress and egress rate limitation can be
activated per user and network port. The
rate limitation is configured per packet
types.
Figure 1. 2G/3G Cellular Backhaul
(6 páginas)
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