The BX25, AimValley’s next-generation SDH Access Device, enables true multi-service carrier-grade access network solutions for tomorrow’s converged networks. The cost-effective add/drop multiplexer and small cross-connect integrates voice, leased line and packet transport on a compact platform. The system is designed for customer premises access as well as metro aggregation networks, furthermore it is very well suited as a transport device in the wireless infrastructure. The BX25 is optimized to provide unparalleled density and small size at low cost.



  • SDH interfaces: Two STM-4/1 enabling SDH carrier class transport
  • Access interfaces: E1, FE and full-rate Gigabit Ethernet
  • Hot-pluggable SFP modules for flexible reach and rate selection of SDH interfaces
  • Standards compliant Ethernet mapping via GFP, Virtual Concatenation and LCAS for Ethernet private line applications
  • Intuitive web-browser based user interface
  • Compact design measuring only 1RU high, 19″ wide
  • Low power and low cost start configuration

Reduced capital and operational expenses

Capex and Opex reductions are the main benefits of the BX25:

  • Highly integrated architecture with all functions combined on a single low-cost box
  • The scalable system allows to start with a STM-1 terminal configuration and later upgrade with additional SFP modules to create an STM-4 add/drop multiplexer
  • The system is preconfigured to ease installation and simplify service turn up without the need for costly and trained staff
  • Convergence of data and voice combined with high integration density significantly reduces the amount of equipment; this results in considerable lower investment, installation, operational and maintenance costs
  • Optimal bandwidth utilization and flexibility is guaranteed by data mapping using GFP, Virtual Concatenation and LCAS. The operator can allocate a specific amount of bandwidth per end user, in steps of 1 Mbit/s up to 1 Gbit/s
  • Hot-pluggable small form factor pluggable (SFP) modules for the STM-1 or STM-4 optical interfaces allows flexibility to select the required optical power budget and link distance

Integration in existing networks

The BX25 protects the investments made in the installed SDH network and improves the operator’s TDM services and revenue through its higher integration and lower cost solution. In addition, the system supports effective Ethernet transport over the existing network without the need for costly deployment of an overlay network.

Management of the BX25 is easily integrated in an existing network management solution. The system provides an Ethernet management port for on-site craft maintenance. Remote management is via DCC channels or via dedicated VC12s so as to not conflict with DCC channels already in use for existing network management. The TCP/IP stack and OSPF routing simplify management of remote BX25 systems from a single operations system.

The BX25 provides SNMP alarm traps as well as web-browser based provisioning.


Traffic Interfaces 2x STM-4 or STM-1 via SFP
2x E3/DS3 (mini coax)4x E1, 75 or 120 Ohm (RJ45)
2x Gigabit Ethernet: 10/100/1000BASE-T (RJ45)
2x Fast Ethernet: 10 or 100 Mb/s (RJ45)
Pluggable Modules STM-1 (S1.1) 15km, STM-1 (L1.1) 40km, STM-1 (L1.2) 80km
STM-4 (S4.1) 15km, STM-4 (L4.1) 40km, STM-4 (L4.2) 80km
STM-1 electrical
Single fiber operation
Cross connect and Protection Pre-defined configurations for cross connect and VCAT bandwidth allocation
Non-blocking cross connects
MSP and LO-SNC protection
LCAS based protection
Loopbacks on E1 and Ethernet ports
Synchronization Internal 4.6 ppm SEC G.813 clock
Station clock input and output: 2 MHz or 2 Mb/s, 75 or 120 Ohm
Clock reference modes: Locked to STM-N timing or station clock input, Hold-over or Free running
Ethernet applications Point-to-point Ethernet Private Line
Up to full-rate 1 Gb/s end-to-end
Ethernet rate control in steps of 1 Mb/s up to 1 Gb/s
Ethernet mapping GFP-F encapsulation
Virtual Concatenation VC4-xv (1..7), VC3-xv (1..9) or VC12-xv (1..63)
OAM&P Ethernet Port Performance counters
SDH Performance Monitoring
Fault management and reporting
Local and remote software and database download
Alarm contact and discrete inputs
Management Ethernet 10/100BASE-T for local management access
Console port (RS232)SNMP traps for alarming
Web-browser based provisioning
TCP/IP and PPP over DCC or dedicated VC12 for remote management access
OSPF routing for remote management access

19″ wide, 1 RU high, 180 mm deep

Power Power input configurations (factory option):
– 230V AC power input
– Redundant 48V/60V DC power
Power dissipation less than 25 Watt
Environment Operating condition: ETS 300 019, class 3.1E
Storage condition: ETS 300 019, class 1.2
Transport condition: ETS 300 019, class 2.3
Free convection cooling without the need for fans
Standards compliance In compliance with the latest ITU, ETSI, IEC and IEEE standards for SDH and Ethernet equipment

For more information about the specifications, please contact us.