Securing connectivity over leased or dial-up line

The DXMP-1600 provides secure connectivity between multiple networks over

leased or dial-up line. It’s a flexible product in which you can add

connectivity modules as your network grows. You can make/receive VOIP calls on

your data network. It has built-in security to protect your LAN from

unauthorized access. If you have two WAN links, then you can use it to create a

reserved backup link. It will automatically switch to this link in case the

primary goes down. 

The product has two WAN slots, out of which one is filled with WAN module.

There’s a 10 Mbps Ethernet port, and a separate VOIP module. The router has to

be configured using HyperTerminal, and its command line interface supports the

default router commands, so it can be configured easily. There’s also a

detailed user guide that explains the commands. Unfortunately, the Web based

management interface wasn’t as expected. It merely launches a command line

interface.

It has a 32 MB SDRAM, which can be extended to 64 MB. It also has 8 MB flash

memory, which can be extended to 16 MB. The router supports both V.24 and V.35

modes for WAN connectivity.

Here, V.24 mode uses RS232 connectivity and V.35 uses a V2.4/V3.5 switch

cable. On the routing front, it supports all standard routing protocols such as

RIP V1/V2, OSPF, BGP, DDR and IGRP. It also supports SNMP. For VOIP, it supports

H.323, H.225, H.245, RTP, RTCP with voice codecs G.711, G.723 and G.729.

The device has a built-in DHCP server. It can also do IP filtering to

restrict users from accessing the WAN link based on IP address, HTTP or FTP

traffic. You can even configure this device for on-demand bandwidth allocation

with two WAN link modules.