APC IP DSLAM Betriebsanweisung PDF herunterladen (Seite 11)

Introduction to the EDA 1200 System

Figure 4 Voice Services

Both POTS and Telephony over IP will give the same perceived quality, and

the same supplementary services. However, Telephony over IP based on

residential gateway cannot be considered as a Life Line since there will be no

connection if the power at the customer premises fails. IP Telephony will not

give the same perceived quality. In some cases providers will offer a Voice

Gateway in order to be able to call a PSTN connected telephone. The main

difference is that along the IP path, the voice packets are not prioritized, which

will cause longer delay, jitter, and lost packets.

Note: Telephony over IP is also available using optical Ethernet instead of

DSL.

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APC IP DSLAM Betriebsanweisung Seite 11