CItpTcNumberingPlan
The SCCP GTT Numbering Plan (NP). The following values are generally used: Unknown NP (0), ISDN/Telephony NP (1), Spare (2), Data NP (3), Telex NP (4), Maritime Mobile NP (5), Land Mobile NP (6), ISDN/Mobile NP (7), Private NP (8). Max NP (15), Invalid NP (253), Wild NP (254).