User guide

Telephony and Multimedia Services
1/1551-HSC 901 35/3 Uen C 2005-12-02
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8 Telephony and Multimedia Services
When migrating from analog line to ADSL, the EDA System supports the
different telephony solutions as well as multimedia solutions:
• Base band POTS
• Base band ISDN
• Telephony over IP
• Multimedia services such as video over IP
Base band POTS is traditional analog telephony, supplied by a local
exchange, in the frequency band below the DSL frequency spectrum, see
Figure 48 on page 69.
Base band ISDN is traditional ISDN telephony, supplied by a local
exchange, in the frequency band below the DSL frequency spectrum, see
Figure 48 on page 69. Note that the ISDN upper frequency is approximate
since the frequency depends on the coding).
Figure 48 Base band POTS and ISDN Frequency Separation