X.121

by Betascript Publishing
State: New
$31.55
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Betascript Publishing X.121
Betascript Publishing - X.121

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Description

High Quality Content by WIKIPEDIA articles! X.121 is the ITU-T address format of the X.25 protocol suite used as part of call setup to establish a switched virtual circuit between Public Data Networks (PDNs), connecting two network user addresses (NUAs). It consists of a maximum of fourteen binary-coded decimal digits and is sent over the Packet Layer Protocol (PLP) after the packet type identifier (PTI). The address is made up of the international data number (IDN), which consists of two fields: the 4 digit data network identification code (DNIC) and the (up to) 10 digit national terminal number (NTN). The DNIC has three digits to identify the country (one to identify a zone and two to identify the country within the zone) and one to identify the PDN (allowing only ten in each country).

Further information

Language:
English
Number of Pages:
64
Media Type:
Softcover
Publisher:
Betascript Publishing

Master Data

Product Type:
Paperback book
GTIN:
09786131413971
DUIN:
R4KCM2SIBKR
$31.55
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