Which feed current types Do FXS interfaces on a 4FXS1FXO INTERFACE CARD Support

FXS interfaces on a 4FXS1FXO interface card support the following feed current types:
0-16 mA constant current
1-20 mA constant current
2-25 mA constant current
3-30 mA constant current
4-35 mA constant current
5-40 mA constant current
6-45 mA constant current

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