CCNA Study Guide

This Blog highlights CCNA study materials for those pursuing the CCNA EXAM 640-801.It is a must read for those going for the exam and need last minute total recall.

Click Here for CCNA exams qns!

Tuesday, March 28, 2006

ISDN (INTEGRATED SERVICES DIGITAL NETWORK)

ISDN

Integrated Services Digital Network

Terminal equipment types:

TE1: understands ISDN

TE2: predates ISDN and needs a TA (terminal adapter) to work

ISDN reference points:

R: between non-isdn device and TA

S: between terminal and NT2 device

T: point between NT1 and NT2

U: point between NT1 and carrier line termination device

ISDN protocol codes:

E: existing telephone network

I: concepts, terms, and services

Q: switching and signaling

ISDN service levels:

Connect to lines with SPIDs (service Profile Identfiers) (phone numbers..)

BRI: Basic Rate Interface: 2B + 1D

B = 64kbs, D=16Kbps = 128kbs plus control

PRI: Primary Rate Interface: 23B + 1D

Total of 1.544Mbps

Configuring ISDN BRI

#isdn switch-type ?

tons of proprietary switch types

#interface

typicaly bri0, or something like that.

#encap ppp

ppp is method used to setup isdn phone calls

#isdn spid1

#isdn spid2

3 Comments:

Anonymous Anonymous said...

This is very interesting site... »

5:40 AM  
Anonymous Anonymous said...

That's a great story. Waiting for more. male adult funny cartoons digital cameras Equifax credit reports free Canon digital camera for sale Zoloft trials Maytag neptune dryer problem http://www.buy-modafinil.info/provigilmodafinilbuyonline.html car rentals modafinil

7:30 PM  
Anonymous Anonymous said...

That's a great story. Waiting for more. »

12:03 AM  

Post a Comment

<< Home