From 33613a85afc4b1481367fbe92a17ee59c240250b Mon Sep 17 00:00:00 2001 From: Sven Eisenhauer Date: Fri, 10 Nov 2023 15:11:48 +0100 Subject: add new repo --- Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/buttons.html | 109 ++++++++++++++++ Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/content.html | 140 +++++++++++++++++++++ Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/index.html | 29 +++++ Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/media.html | 21 ++++ 4 files changed, 299 insertions(+) create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/buttons.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/content.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/index.html create mode 100644 Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/media.html (limited to 'Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6') diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/buttons.html b/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/buttons.html new file mode 100644 index 0000000..e6ff410 --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch4/4_1_6/buttons.html @@ -0,0 +1,109 @@ + + + + + + + + + + + +New Page 1 + + + + + + + + + + + + + + + + + + + + + + + +
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+ + 4.1 + ISDN Concepts 
  + 4.1.6 + Determining the router ISDN + interface 
+ + + + + + +
+ + In the United States, the customer is + required to provide the NT1. In Europe and various other countries, + the telephone company provides the NT1 function and presents an S/T + interface to the customer. In these configurations, the customer is + not required to supply a separate NT1 device or integrated NT1 + function in the terminal device. Equipment such as router ISDN modules + and interfaces must be ordered accordingly. +

+ + To select a Cisco router with the appropriate ISDN interface, do the + following:

+
    +
  1. Determine whether the router supports ISDN BRI. Look on the back of + the router for a BRI connector or a BRI WAN Interface Card (WIC).
    2. +
  2. Determine the provider of the NT1. An NT1 terminates the local loop + to the central office (CO) of the ISDN service provider. In the United + States, the NT1 is Customer Premise Equipment (CPE), meaning that it + is the responsibility of the customer. In Europe, the service provider + typically supplies the NT1. + +
    3. +
  3. If the NT1 is CPE, make sure the router has a U interface. If the + router has an S/T interface, then it will need an external NT1 to + connect to the ISDN provider. +
    4. +
+

+ + If the router has a connector labeled BRI then it is already + ISDN-enabled. With a native ISDN interface already built in, the + router is a TE1. If the router has a U interface, it also has a + built-in NT1. +

+

+ + If the router does not have a connector labeled BRI, and it is a + fixed-configuration, or non-modular router, then it must use an + existing serial interface. With non-native ISDN interfaces such as + serial interfaces, an external TA device must be + attached to the serial interface to provide BRI connectivity. If the + router is modular it may be possible to upgrade to a native ISDN + interface, providing it has an available slot.

+
+

+ + Caution: A router with a U interface should never be connected to an + NT1 as it will damage the interface.

+
+

+ + + + +
+ + + + + +
+ +
+ + + + + +
+ + + + + +
  +

+ + Web Links

+ + +

Integrated Services Digital Network (ISDN)

+ + http://www.cisco.com/univercd/cc/ + td/doc/ cisintwk/ito_doc/ isdn.htm

+ +

+

+
+
+

+       + +      

+
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