The Full form of SDNB is Secondary DN Call Blocking, or SDNB stands for Secondary DN Call Blocking, or the full name of given abbreviation is Secondary DN Call Blocking.
SDNB (Secondary DN Call Blocking)
Secondary DN Call Blocking is known as SDNB.
SDNB all full forms
All the above full forms are related to SDNB. A little information is given about one of these full forms. If you are not satisfied with the information given about 'Secondary DN Call Blocking (SDNB)', then comment. Or if you know more about 'Secondary DN Call Blocking (SDNB)', then write.