Turning off CLI (Calller ID) on VOIP.CO.UK - follow up

Hi Folks,

Just to follow up on my post about controlling or turning off CLI on
outbound calls from Asterisk thru VOIP.CO.UK.

Their new software will let you pass CLI when VOIP.CO.UK eventually
manage to implement it (it was slated for roll-out last December).

If you opt to withhold CLI within your SIP accounts at VOIP.CO.UK it
doesn't work and still passes it.

BUT

If you set an Outbound Dial Prefix of 141 in your (outbound) SIP trunks
then all calls withhold CLI and go out as 'anonymous'.

Not ideal, but expedient.