I don't know where this might be on the switch, but you should be able to get the ranges from the T-1/ISDN vendor. Then, go to load 20
REQ: PRT
TYPE: LUDN
CUST 0
DN: X Where X = the range you want to check. For, example, if you DID range is 5500-5599, enter 55 to get a list of available DN's in the range.
as above, look at your used numbers, the missing numbers are normally did's... they come in blocks of 20 and to have a broken block would be rare. best way to tell is put a number on your phone and try calling it from outside.. either that or you phone bill should have at least the block size if not the range.. a did requires no switch programing after the 1st one works the provider sends the agreed digits.. a small company usually would have at least a hundred.. we have all 10,000 for this site and another 10,000 for a second site
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