Emerging from a discussion about VisionNG on #dundi, and the difficulty of chasing down a good list of their suballocations, I decided to make up pseudo-allocations based on the 'partner prefixes' from http://www.fwd.pulver.com/content/view/full/333
Because of the 'pseudo', these are not advertised on the 'official' DUNDi context (name not mentioned because one must tread lightly with the GPA), but only the dundi-test context.
Comments welcome.

;begin extensions.conf
[dundi-e164-pns-iaxtel]
exten => _87810700XXXXXXX,1,Dial,IAX2/guest@iaxtel.com/1${EXTEN:5}||r ;was NoOp, but that was a brainfart, threw away calls from this *

[dundi-e164-pns-sipphone]
exten => _87810747XXXXXXX,1,Dial,SIP/1${EXTEN:5}@proxy01.sipphone.com||r

[dundi-e164-pns-sipgate]
exten => _87810777XXXXXXX,1,Dial,SIP/${EXTEN:8}@sipgate.de||r

[dundi-e164-pns-voiptalk]
exten => _87810878XXXXXXX,1,Dial,SIP/${EXTEN:8}@voiptalk.org||r
;end extensions.conf

;begin dundi.conf
dundi-test => dundi-e164-pns-iaxtel,599,IAX2,guest@iaxtel.com/1${NUMBER:5},nounsolicited,nocomunsolicit,nopartial
dundi-test => dundi-e164-pns-sipphone,599,SIP,1${NUMBER:5}@proxy01.sipphone.com,nounsolicited,nocomunsolicit,nopartial
dundi-test => dundi-e164-pns-sipgate,599,SIP,${NUMBER:8}@sipgate.de,nounsolicited,nocomunsolicit,nopartial
dundi-test => dundi-e164-pns-voiptalk,599,SIP,${NUMBER:8}@voiptalk.org,nounsolicited,nocomunsolicit,nopartial
;end dundi.conf