q921 is debugging layer 2 information and q931 debugs layer 3 information.
Just remember the middle number and relate it to the appropriate layer.

Eric L. McMasters, CCNA/CCDA
OSSN - Sr. Network Engineer

Phone:    913.859.1986
PCS:        913.485.9734
Fax:         913.859.1234


-----Original Message-----
From: Bond Jeffrey MSgt 93 CSS/SCON [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 10, 2000 9:13 AM
To: Cisco (E-mail)
Subject: ISDN Question 


Can some tell me what the difference between:::    debug q921 and debug isdn
q921.  

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