We have reviewed ISDN devices ranging from simple Terminal
Adapters that look very similar to regular analog modems, to LAN modems, to real high-tech
routers loaded with lots of features. Therefore, it was difficult to do a comparison and
say which is the best one. So, instead, we looked for ease of configuration, and the
feature set. We did some transfer tests and found that average transfer rates was around 7
to 10 kB/sec for all the devices on a 128 Kbps ISDN connect.
We noticed that all routers required us to enter the telecom service provider’s
switch type. The options available are based on the country and not on the make of switch.
And India is not it in their list. In many, the alternative was to select "European
countries". Here’s how each of these babies fared in our tests:
Anil Chopra at PCQ Labs
3Com Office Connect 3C891
Datatronics ISDN TA IS128SS
ISDN LAN modem
Price: Rs 21,412
Special features: IP routing and PPTP support; built-in 4-port hub with
cascading of up to 24 ports; two analog telephone ports.
Pros: Very easy to configure; only requires Web interface for configuration;
good connect speeds.
Source: 3Com Asia India Branch Office, 713/714 7th Floor, International Trade
Tower, Nehru Place,
New Delhi 110019. Tel: 6446123 Fax: 11-6233192
Type: ISDN Terminal
Price: Rs 9,213
Special features: Drivers for both 64 and 128 kbps with multi-link support.
Pros: Easy to configure; like an analog modem.
Cons: Insufficient information for configuring in Windows NT or connecting at
Source: Aditya Promoters Khemka Centre, 2-5 Nehru Place, New Delhi110019.
Tel: 6223810, 6223811 Fax: 6227979
Multi Tech MT 128EXT
Type: ISDN Terminal Adapter
Special features: Drivers for Win3.x/9x/NT; Multi-link support for 128 kbps
Pros: Comprehensive user manual with all AT commands for ISDN; compact in size;
easy to configure.
Cons: Came with a loose power supply that made it difficult to power up.
Source: Multi Tech Computers B-26 Bhikaji Cama Place, Somdutt Chambers I, New
Delhi 110 066.
Type: ISDN Router
Special features: Remote access server built in; IP and IPX routing support.
Pros: Easy to configure; accessible through Hyperterminal, Telnet, or Web
Good transfer rates.