Hardware

The following modem chipsets would work with Asterisk:

• Intel 537PG and 537PU
• Ambient MD3200
• Motorola 62802

To give power over ethernet use the following schema

1 TX+ 2 TX- 3 RX+ 4 DC- 5 DC- 6 RX- 7 DC+ 8 DC+

Give pair 4 and 5 a negative current and give pair 7,8 a positive current. Usually the current is 48V