SDNB: Secondary DN Call Blocking
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Others
Language: English
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Frequently Asked Questions:
What is the full form of SDNB?
SDNB stands for Secondary DN Call Blocking.
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"SDNB." Fullformexpand.com, https://www.fullformexpand.com/sdnb/secondary-dn-call-blocking. Accessed 21 Feb. 2026.
Fullformexpand.com, 2026. "SDNB." Accessed February 21, 2026. https://www.fullformexpand.com/sdnb/secondary-dn-call-blocking.
"SDNB." (n.d.). Fullformexpand.com. Retrieved February 21, 2026, from https://www.fullformexpand.com/sdnb/secondary-dn-call-blocking.
SDNB. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/sdnb/secondary-dn-call-blocking (Accessed: 21 February 2026).
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