[Asterisk-Users] TDM400P... ignoring hanguponpolarityswitch

[Neil and Fiona]

I've just had polarity reversal provisioned by our telco to test hangup
detect with a TDM400P

I've set hanguponpolarityswitch=yes in zapata.conf

When I start Asterisk I get "ignoring hanguponpolarityswitch"
in /var/log/asterisk/messages

I assume that the option is either not valid or conflicts with another
setting somewhere.

Any ideas?