| All-IP
| PSTN
| signaling is more expressive
| accept DTMF only
| signaling is extensible
| not extensible
| integrated Service
| not possible
| huge Signal Payload
| poor payload
| allow capability labeling of CPE
| none
| eliminate user level address scarcity
| phone number is a scarce resources
| | | | | | |
| All-IP
| PSTN
| signal network
| separated networks for signal and media
| variable bit rate
| constant bit rate
| multicast capability
| none
| | | |
| All-IP
| PSTN
| distributed
| centralized
| allow 3rd party services
| not allowed
| highly programmable
| low programmability
| | | |
Web Page Copyright: 國立政治大學資訊科學系 連耀南 lien@cherry.cs.nccu.edu.tw
ipvspstn.htm,
Tue Apr 3 09:03:06 CST 2012
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