NZ POTS Line Impedance

New Zealand Hardware Configuration

From New Zealand VoIP Users Group

Thia page contains information related to the configuration of VoIP hardware for the New Zealand network environment. Mainly, this consists of technical matters related to the connection of ATAs to the Telecom NZ or Telstra networks.

Impedance

Line impedance can be set on FXS and FXO ports.

FXS

FXS Impedance for TNZ: 310 nF // 370 ohms + 620 ohms ( Telecom New Zealand, ref: [1], section 5.0)

FXO

FXO Impedance for TNZ: 310 nF // 370 ohms + 620 ohms ( Telecom New Zealand, ref: [2], section 6.0)

Other cited information:

(220 Ohm + 820 Ohm||120nF) or (370 Ohm + 620 Ohm||310nF) (ref: [3])

Links

http://web.archive.org/web/20080719205311/voipusers.org.nz/wiki/New_Zealand_Hardware_Configuration