According to the 4.0 documentation it is:
From Operational Directions, ME and RE over SIP
142/154 31-ANF 901 14
"Initiate the directory number for the remote extension
number_initiate -numbertype ex -number 479
MOBILE AND REMOTE EXTENSION OVER SIP
17 142/154 31-ANF 901 14 Uen B 2009-12-07
• Initiate the remote extension
GEDII

IR=479,LIM=3,CSP=1;
IPEXI

IR=479,AUTREG= YES ,TERMID=
"479@c-253.btrunk.se" ,URI=
"ROU:77;remote-number=719001234567" ;
• Initiate the number conversion data
number_conversion_initiate -entry 00 719001234567 \
-conversiontype 6, -truncate 14 , -pre 479
TELEC3