ISDN is a digital service supporting speeds of 64K and 128K in it's basic configuration. ADSL is many times faster than ISDN, and for most Internet-related applications, ADSL is a better choice. ADSL is also significantly cheaper than ISDN. See similar questions...

The two services are not the same -- ISDN provides two voice channels or a 128 Kbps data channel while ADSL is predominantly a data pipe providing an asymmetrical bandwidth of up to 8 Mbps downstream and 1 Mbps upstream under good conditions. However, an ADSL access network will be an overlay network and therefore will not require the expensive and time-consuming switch upgrades that held ISDN back for so long. See similar questions...

You will be able to get ADSL if the local exchange supports ADSL and you order an analogue telephone service (extra charge) to be used for the ADSL service. This service would be charged a standard telephone line rental. How many IP addresses do I get with my ADSL service? You will receive at least one static IP address with your ADSL order. See similar questions...

Basic ISDN effectively converts your telephone line to digital with two 'channels', each of which can carry a telephone conversation or data at 64Mb/s. When neither phone line is in use, the data channels can be combined to give 128Mb/s, which puts it at the bottom end of "Broadband". The drawback of ISDN is its price - Telstra have considered it a premium business service, and have priced it out of the reach of residential users. See similar questions...

Yes, however the line has to be re-graded to an analogue line, and BT charge to do this, you are also liable for any terms left on the ISDN contract. Once the line has been regraded, it will be checked for suitability for ADSL. There is a chance the line is not suitable and BT will charge to convert it back to ISDN. See similar questions...

ADSL can’t be installed on ISDN lines, so either you need a separate new (analogue) phone line or for the ISDN to be converted back to an analogue service. See similar questions...

No, because ADSL cannot be provided using BT's ISDN lines. To make ADSL work over ISDN, the ADSL would need to be shifted to a higher signalling frequency in the cable, reducing its transmission reach, and resulting in fewer people being able to benefit from the technology. See similar questions...

Eicon has demonstrated ADSL over ISDN operation using the G.992.2 Annex B standard. Currently shipping products do not support ADSL over ISDN. The reason is that an ADSL connection may share the standard telephone wiring, however, ADSL itself is only connected to the Internet. Since a Diva ADSL modem only accesses the ADSL connection, it too is only connected to the Internet. See similar questions...

Yes, the ADSL technology has been adapted to be used over a ISDN ( digital ) line. Because the ISDN uses more bandwidth than the normal POTS services, there will be less frequencies available for ADSL, which means the theoretical speed limit of ADSL will be lower over ISDN than over a normal line. Usually, the end-user won't feel the difference. See similar questions...

ADSL offers a cheaper and faster service than ISDN. ISDN works by providing two voice channels or a 128 Kbps data channel while ADSL is predominantly a data pipe providing an asymmetrical bandwidth of up to 6 Mbps downstream and 640 kbps upstream. However, the ADSL network is an overlay network and therefore does not require the expensive and time-consuming switch upgrades that held ISDN back for so long. See similar questions...

The two services are NOT the same. ISDN provides two voice channels or a 128 Kbps data channel while ADSL is predominantly a data pipe providing an asymmetrical bandwidth of up to 8 Mbps downstream and 1 Mbps upstream under good conditions. However, an ADSL access network will be an overlay network and therefore will not require the expensive and time-consuming switch upgrades that held ISDN back for so long. See similar questions...

You cannot use both WAN interfaces to connect to internet (via the same ISP or different ISP's) at the same time, as the router wouldn't know which internet connection you wanted. But you can have the ADSL connected to the Internet and use the ISDN for a dial-in teleworker or a VPN to a branch office. Technically speaking, where the ISDN is being used to route to a specific directly-dialled subnet. If you have a remote office or teleworker which only has ISDN (i.e. See similar questions...

Most of these services are not available in our service areas. Cable Modems, ISDN, and ADSL are all dependent on physical wires, and a middle man (i.e., the phone company). With Wireless Internet Access, you are dealing with no wires and directly with the ISP; there is no middle man. There are also speed factors. Click here to see a chart on speed comparisons. See similar questions...

After you have added your service selection to the shopping basket and proceeded to checkout you will be asked to enter your telephone number. The system should return with a message Failed: Incompatible Product. Scroll to the bottom of the page and select ISDN Convert as the order type. Note: an engineer visit is required to convert your line from ISDN. You will be given the opportunity to chose an appointment time when you place your order. See similar questions...

DSL is Faster: ISDN provides two voice/data channels, each at speeds of 64 Kbps, while DSL is predominantly a data service providing up to 1.5 Mbps downstream and up to 512 kbps upstream. Business DSL offers T1-like speeds of up to 1.5 Mbps-more than 10 times faster than ISDN! DSL is "always on": ISDN is a dial-up service (like a regular telephone line) that's digital and carries both data and voice; Business DSL is "always connected" See similar questions...

ISDN BRI provides the transmission of digital information between Allstream's local central office equipment and comparable equipment at the customer's location enabling simultaneous transfer of voice, data, video and fax communications at speeds up to 128Kbps (2 x 64Kbps). ISDN PRI provides two-way connectivity between a customer's Private Branch Exchange and the Public Switched Telephone Network (PSTN) over a DS-1 interface enabling customers to carry both voice and data communications. See similar questions...

ISDN and regular modems are technologies that offer the ability for customers to dial many different locations for Internet access or other online services. With Talaya DSL services, the connection is a permanent, ‘always on’ connection. Back to Top See similar questions...

Both ADSL2+ and ISDN use the copper wires that connect you to your local exchange (sometimes known as 'the last mile' or 'the local loop'), but an ADSL2+ line provides a digital service over the same line and at the same time as your analogue service (without interfering with it), while an ISDN line provides only a digital service (but this can be 'converted' to analogue by your terminal equipment or Highway wall box for voice calls). See similar questions...