The WAN-in-a-Can range of LAN extender products extend LAN connection over a wide area link.
The integrated 4-port LAN switch supports local switching, thereby removing the need for external
switches or hubs in smaller LAN installations. Full wirespeed switching and filtering between the
10/100 BaseT LAN ports is supported so that only packets destined for the remote site are forwarded
over the link. Different WAN-in-a-Can models support E1, E3 and DS-3 leased line links, and also
serial X.21 and V.35 connections.
Feature rich LAN extension over Serial, E1, E3 or DS-3
Quad port Ethernet switch on subscriber side
4 Auto-negotiating subscriber 10/100 BaseT ports
Auto MDI/MDIX switching on all subscriber ports
Wire speed local switching between subscriber ports
Wire speed filtering of local packets
Efficient HDLC packet handling on WAN port:
82236 packets per second on DS-3
Serial version with X.21, or V.35 interfaces
EIA-530 interface option via external cable
Integral auto-sensing PSU, optional integral -48VDC supply
The WAN-in-a-Can family requires no configuration in most installations, and is truly "plug and
play". The subscriber ports are auto-sensing and support both 10M and 100M in full or half duplex
modes. Manual selection of 100M FD operation enables connection to fixed port routers. Cabling
issues are minimised through the use of automatic MDI/MDIX selection on these ports.
The highly efficient HDLC encapsulation of packets ensures that maximum throughput is achieved
on the WAN link. Internal packet buffering enables each WAN-in-a-Can product to smooth out
bursty traffic without packet loss.
For low bandwidth applications such as BT's Kilostream , the WC-X.21 and WC-V.35 models offer
a choice of X.21or V.35 DTE interfaces. The X.21 interface is presented on a 15 way D-type
connector and the V.35 on a 34 way M-rack connector. An external cable can be used to convert
an X.21 interface into EIA-530. The serial port operates in DTE mode, and requires the attached
DCE to supply timing. The X.21 port may also be operated in a dual-clock, EIA-530 mode to
support asymmetric operation.