Point to point E1 & Ethernet Over Fibre

E1/T1 or Ethernet over Fibre Multiplexer

• 8 x E1/T1 ports
• 8 x 10/100BaseT
• Multimode or singlemode fibre uplink
• Configuration wizard for virtual plug and play
• Configuration download to/from remote unit for guaranteed correct setup
• Alarm extension relay
• RS232 console port
• SNMP and Telnet remote management
• Complex SDH Mux mode available via user interface

Another product in our portfolio is our Emux E1 Multiplexer, which provides 4x, 8x, or 16x E1 leased lines over resilient fibre. Offering transparent E1 extension our Emux is ideal for voice and data protocols, examples include: PRI ISDN-30, QSIQ, DPNSS, DASS, IP.

There are three models in the range:

• MetroLAN1000/MM for use with multimode fibre (up to 5km)
• MetroLAN1000/SMSH for use with singlemode short haul fibre (up to 30km)
• MetroLAN1000/SMLH for use with singlemode long haul fibre (up to 70km)

Using fibre optics the MetroLAN1000 products extend the operating distance for a E1 2Mbps G.703 interface to 5km using multimode fibre, or to either 30km or 70km using singlemode fibre. Despite these quoted maximum operating distances for the MetroLAN products, specific installations may only operate over lower distances due to the variations in losses of different types of fibre cable, the use of connecting fibre cables, or patch panels. When operating over 50% of the maximum distances it is advisable to calculate all fibre optic connector and cable losses and compare these with the fibre optic loss budget specified for this product.

The MetroLAN1000 presents 8 E1/T1 G.703 clear channel ports, which are suitable for the transmission of both structured and unstructured data, such as G.704, ISDN PRI.

The MetroLAN1000 also presents 8 LAN ports which are fully auto-sensing 10/100BaseT interfaces with manual override (e.g. 100M full duplex when connecting to Cisco routers), thereby supporting any LAN network infrastructure. These 8 independent LAN interfaces are separately allocated bandwidth and so there is no contention to worry about.

The MetroLAN1000 supports IEEE 802.3x flow control on all 10/100 ports to prevent traffic loss when reduced bandwidth is available.

The MetroLAN1000 supports large frames of up to 4096 bytes and is protocol and payload transparent. The MetroLAN1000 will pass VLAN tagged frames, including "Q in Q" double tagged frames and CISCO ISL, transparently end to end.

Configuration is via a wizard which automatically allocates bandwidth to the number of ports of each type that are selected (VC12 to each E1, remaining VC12 containers are divided equally between the enabled Ethernet ports). The fibre uplink supports up to 140Mbps of payload (63 off VC12 containers) .

The management of the MetroLAN1000 is either local via the console port or remote via the Ethernet management port using SNMP or Telnet. Both console and Telnet access methods are password protected. Performance statistics are available for all ports. SNMP Version 1 is supported, including MIB2 and traps. SNMP traps will be generated based on alarms for any of the network or user ports. TFTP download of software and configuration data is supported as a means of future-proofing the products.

A pair of changeover relays indicate alarm conditions arising on the MetroLAN1000. The major alarm relay is energised for normal operation to ensure that a fault is signalled in the event of power failure. The integral PSU is fully auto-sensing from 100 to 250 VAC, and -48VDC powered versions are also available.