VoIP vs PSTN
| VoIP | PSTN |
|---|---|
| Channels carried over on Internet connection | Carried through dedicated lines |
| Carried at 10kbps in each dirrection | Each line is carried at 64kbps in each dirrection |
| Features, such as Caller ID, and Call Waiting are typically included free with service | Features, such as Caller ID and Call Waiting are available at an extra cost |
| Can be upgraded by software upgrades and bandwidth | Requires new equipment to be upgraded or expanded |
| Long distance calls are typically included with service | Long distance calls usually cost per minute or through bundle subscription |
| If no power, no service | Can use during a power outage |
| 911 calls can't always be traced to a location | 911 calls can be traded to a location |