1 / 5

ISDN Standards Overview 1

General Datacomm. ISDN Standards Overview 1. E Series protocols Telephone network standards such as E.164 for international addressing etc. I Series protocols Concepts, terminology and general methods such as I.200 services etc. Q Series protocols

imaran
Download Presentation

ISDN Standards Overview 1

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. General Datacomm ISDN Standards Overview 1 • E Series protocols • Telephone network standards such as • E.164 for international addressing etc. • I Series protocols • Concepts, terminology and general • methods such as I.200 services etc. • Q Series protocols • Switching and signaling standards such as; • Q.921 describes data-link LAPD • Q.931 describes network layer KCC 18th August 2002

  2. General Datacomm ISDN Standards Overview 2 • PRI STANDARDS • In USA and Japan T1/DS1 • 23 x 64kbps bearer (B) channels • 1 x 64kbps data (D) channel • In UK Australia & Europe • 30 x 64kbps (B) channels • 1 x 64 kbps (D) channel • H channels bond multiple B channels • BRI STANDARDS • Most countries now 64kbps • few remain on 56kbps • 2 x 64kbps (B) channels • 1 x 16kbps (D) channel KCC 18th August 2002

  3. General Datacomm ISDN Example Topologies BRI S/T EXAMPLE SITE IN EUROPE/UK Routers have BRI S/T interface and connect Into Telco supplied NT1 EXAMPLE SITE IN USA Local-Loop (U interface) available direct into the Router without the need for external NT1 BRI U BRI U I S D N BRI U NT1 TE1 with NT1 built in BRI T EXAMPLE OF LARGER SITE IN EUROPE/UK Routers can connect via NT1 or via NT2 using the BRI S/T interface Or any serial device can connect through a TA BRI S NT2 TE1 BRI S TA TE2 V.24 serial R V.35 serial R TE2 KCC 18th August 2002

  4. General Datacomm ISDN BRI startup sequence Line inactive TE becomes active and signals a 7E HDLC flag (7E = “01111110”) Network switch send frame with the A-bit set to 0 (A=0 = no activated) TE then synchronises on three successive pairs of line code voilations TE then starts sending physical frames NT synchronises using line code violations NT starts sending frames with A-bit set to 1 (A=1 = activated) KCC 18th August 2002

  5. RJ-45 pin NT RJ-45 TE Wire LT RJ-45 NT Polarity 3 Transmit Receive + 4 Tip 4 4 Receive Transmit + 5 Ring 5 5 Receive Transmit - 6 Transmit Receive - General Datacomm ISDN Physical BRI S/T Interface (RJ-45) Pinouts BRI U Interface (RJ-45-to-RJ-45) Pinouts KCC 18th August 2002

More Related