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Speed and flexibility.

Kari Tiihonen (kari.tiihonen@pcb.mpoli.fi) writes:
Nobody has yet talked about the speed of ISDN. It's ideal for remote
operations with it's V.42bis capability - you'll reach 30,00 cps if
your DTE can handle it. Zipped files will move around 15, 000 cps. Nice?

ISDN allows the following connection possibilities:

1. 1B - ISDN (64k)

2. 2B - ISDN (128k)

3. 1B - ISDN (64k)
   1B - External Analog device (phone, fax, modem)

4. 1B - V.34 over ISDN (to a remote analog device) up to V.34 speeds

5. 1B - V.34 over ISDN (to a remote analog device) up to V.34 speeds
   1B - External Analog device (phone, fax, modem) 


In scenario 5, users can use one B channel to maintain an ISDN connection.
SIMULTANEOUSLY, users can either talk/fax/modem/voicemail on the other B
channel.  <Editor's note: "Awesome eh!">