ZyXEL Communications P-202 - Manual (Page 362)

P-202H Plus v2 Support Notes
Support Tool
1. Using ZyXEL ISDN D Channel Analyzer, EPA
Introduction
An ISDN call connection failure can be diagnosed by using P-202H Plus v2's
ISDN embedded protocol analyzer (EPA). The cause code in the EPA log can
also help us to diagnose the disconnection of an ISDN call.
Using EPA Analyzer
You must connect the P-202H Plus v2 to a terminal program via the serial port to
capture the EPA. The EPA will not operate by Telnet. The steps for enabling the
EPA are as follows:
1. Enter to SMT Menu 11 and note which node N you will be dialing
2. Enter to SMT Menu 24.8
3. Enable the EPA capture capability by:
P-202H Plus v2>isdn fw ana on
4. Manually dial to remote node N
P-202H Plus v2>dev dial N (N is the node number in Menu 11)
5. Wait for all progress messages, and manually drop the call:
P-202H Plus v2>dev channel drop [bri0|bri1|all] (bri0 for B1 channel, bri1 for
B2 channel, all for all channels)
6. Turn off the EPA by:
P-202H Plus v2>isdn fw ana off
7. Dump the EPA by:
P-202H Plus v2>isdn fw ana disp
The trace appears on the screen as in the following example. Please use
PageUp and PageDown to browse the EPA trace.
Example:
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