看樓下的VD's CID post, nonoh.net and Voiopdiscount are

the same branch of Betamax group's VSP. they have the same settings for the CID. do the following:
1) use softphone to verify the connection to your ATA, usually call the other line of the ATA, such as Sipgate line in the ATA line 2.
2) after successful callin, set the CID of nonoh account at line 1 as any DID you have, such as a GV# or the the SipGate's DID. All CID has to be started with 1.
3) 出入自在 said that you have to verify GV# then use the GV# as your CID. I think in order to verify the GV# you have to forward your GV to your other phone line, then you can do that.
4) I have never verified GV# with nonoh, but still can use GV# as CID for nonoh， but the result is nonoh showing the CID as a random number. For this reason you might have to verify the GV# to use it as CID.