Is ISDN and ADSL technoglogies support concurrent incoming connection.
Example: I have 3 branch office where this 3 branch office will connecting to the Headoffice at the same time using the ISDN line.
My question:
1. do i need 4 ISDN line to do this or 1 line 4 channel(64k p/channel) for the headoffice to support 3 incoming connection at the same time? I know only the branch office need one ISDN line.
2. Do i need a separate account each for each site? I got 3 branch office and1 headoffice. So, i need 4 ISDN account register at ISP?
3. do i need a ISDN router or ISDN modem? Or the HeadOffice will be using router and branch office using ISDN modem? Or all use router?
4. Is this situation also apply to the ADSL? Like say 4 ADSL line, 4 ADSL register account, ADSL router or ADSL modem?
Please advise.. Thanks anyway.