Call delay when sending over IP route with PSTN overflow

[Kronehead]

For the dnt1 entry below I trc all but the last 4 digits. Call is sent to Cisco IP route (60 channels)and converted to 7 digits. I set up a dest 3021 with overflow to pstn therefore I have to send all the digits so I pre them back on again. Works fine but a long delay of 12 secs before call is sent. If i send only to the IP route and don't have an overflow call is sent immediately but I risk congestion.
Any ideas how to work around this? In the example below I omitted the default values. rou 2 is IP on TLU76/1 & rou 26 is DASS on TLU76/2

dnt1 entry=900321234,trc=9,toll=111111111111110dest=3021,rou=2,adc=0005000000000250000,trc=4,srt=5,numack=0,pre=3021375                 dest=3021,rou=26,cho=1,adc=0005000000000250000,trc=4,srt=5,numack=0,pre=302100321234

 

[Vetinari]

#Out of cheese error#
#Insert new Universe, and reboot#

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