(Mpli) points to the Primary Line's digit map and pli points to the Primary Line, so {(Mpli):pli} is equivalent to {(Msp1):sp1}. The primary line is set under Phone1 Port.
Routing an outbound call is a 2 step process. The phone digit map validates the dialed number then the outbound route routes the call to a trunk. If you alter a number in the phone digit map, the outbound route will see the modified number. I removed adding 01443 from the phone digit map, so you will get a match in the outbound route. The colon is optional when only adding digits.
Service Providers > ITSP Profile A > General > DigitMap
(999S0|101S0|111S0|112S0|02920xxxxxxS0|084[45]x.S3|087[01]x.S3|076[59]9xxxxxxS0)
Service Providers > ITSP Profile B > General > DigitMap
(<01443>[2-8]xxxxx|0[12378]x.)
Physical Interfaces > Phone1 Port > DigitMap
((Msp1)|[2-8]xxxxxS0|0[12378]x.S3|xx.S3)
Physical Interfaces > Phone1 Port > Outbound Call Route
{(Msp1):SP1},{(Msp2):SP2},{(xx.):sp1}
Edit:
I added xx. to the phone digit map. When a rule ends with x. there will be a 10 second delay, so I added S3. Alternately, you can globally change the Long Timer under Phone1 Port.