Axerra Networks

› PBX-to-PSTN Backhaul and Ethernet VPN over Metro Ethernet or IP


Growing demand for Ethernet services and increased availability of cost-effective Ethernet infrastructures at the metro access networks are creating new exciting revenue opportunities for service providers. By enabling both PBX T1/E1 backhaul and Ethernet VPN to small- and medium-sized businesses over a single high-speed Ethernet link, providers leverage next-generation metro technologies (e.g. Metro Ethernet, RPR, IP Metro) to expand service offerings, increase revenues, and cut costs.


Axerra’s AXN1 and AXN10 pseudo-wire access devices encapsulate tagged Ethernet (802.1q) traffic on a per-VLAN basis using Ethernet pseudo-wire encapsulation (ETHoP). Resulting packets are transported across the provider’s IP/MPLS backbone, enabling VLAN-aware Ethernet VPN service. With ETHoP, corporate and branch office LANs can be connected through Ethernet pseudo-wires in a point-to-point, point-to-multipoint, or even full mesh topology.

In addition to Ethernet pseudo-wires, Axerra’s AXN1/10 pseudo-wire access devices backhaul PBX T1/E1 voice circuits to the PSTN over metro Ethernet or IP access infrastructure using the industry’s most robust TDM pseudo-wire encapsulation known as Circuit Emulation Service over Packet (CESoP). A unique feature within the AXN1/10 also enables Dynamic Bandwidth CES (DB-CESoP) capabilities of CAS/CCS-aware voice circuits and thereby optimizes the bandwidth consumption on the network uplink. At the CO (Central Office) / PoP (Point-of-Presence), Axerra’s carrier-class AXN1600 or AXN800 pseudo-wire gateways, aggregate, terminate, and groom multiple CES or DB-CES flows into channelized T1/E1, T3/E3, and OC-3/STM-1 interfaces for cost-effective integration with class-5 switches.

Benefits for Service Providers

  • Enables voice and data integration over a single Ethernet access link and thus reduces providers’ Operational Expenses (OpEx) associated with TDM leased lines
  • Simplifies provisioning of point-to-multipoint or full mesh IP VPN topology
  • Protects “legacy” capital investment at PBX and class 4/5 switches while eliminating new investments in VoIP
  • Enables efficient bandwidth utilization between residential and business customers through dynamic bandwidth allocation between voice and data (DB-CESoP)
AN-PBX Backhaul and Ethernet VPN  AN-PBX Backhaul and Ethernet VPN
PrintTell a friend
More Articles:
› PBX-to-PSTN Backhaul and Internet Access over Metro Ethernet or IP
› 2G BTS Backhaul over Ethernet or IP
› 2G BTS and 3G NodeB Backhaul over Ethernet or IP