Actually, it shows up more than once. In the sample output from the "show
isdn status" listed just above the table, sapi and tei are listed under
layer 2. :-)
TEI and SAPI are part of the address field of an LAPD frame - which is
Layer 2.
If you want further info about them, check out this:
http://protocols.com/pbook/isdn.htm
Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
"Taylor, Don"
<dontaylor@kp To: "'Ole Drews Jensen'"
<[EMAIL PROTECTED]>,
mg.com> "'[EMAIL PROTECTED]'"
<[EMAIL PROTECTED]>
Sent by: cc:
nobody@groups Subject: RE: TEI & SAPI
tudy.com
07/27/00
02:12 PM
Please
respond to
"Taylor, Don"
Your post made me wonder, so I went a-searchin'. The only thing I was able
to find on it that might be somewhat authoritative is the following URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/dial_
r/drprt1/drbri.htm
Scroll to the bottom of the page and look at the table (or just do a search
for "sapi" - it only shows up once). Note that SAPI doesn't enter the
equation until layer 3.
- Don
-----Original Message-----
From: Ole Drews Jensen [mailto:[EMAIL PROTECTED]]
Sent: Thursday, July 27, 2000 1:16 PM
To: '[EMAIL PROTECTED]'
Subject: TEI & SAPI
I had a question in my study guide about what the combination of TEI & SAPI
gives you.
My answer was 'A unique datalink layer address', but the answer in the book
said 'A unique network layer address'.
I had the understanding that this was info in the address field of the LAPD
protocol (Q.921) which is operating on the ISDN D-channel in the Datalink
layer.
Who's right, and if I'm wrong - could someone please explain why?
I hope this is a typo in the book, because just when you think you know
what
the .... it's all about, you get thrown a "No, you're wrong" in the face...
Thanks in advance,
Ole
P.S. Besides the few typo's I've seen, so far this BCRAN book (from McGraw
Hill) is excellent!!!!
~~~~~~~~~~~~~~~~~~~~~~~~
Ole Drews Jensen
Systems Network Manager
CCNA, MCSE, MCP+I
RWR Enterprises, Inc.
[EMAIL PROTECTED]
~~~~~~~~~~~~~~~~~~~~~~~~
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