ZETRON 2000 Series Specifikace stáhnout pdf (Strana 144)

Multiport for TNPP and TAP Outdial

144 025-9035AA

Port two received an inbound packet that had an inertia value of one, and the routing for

the destination indicated that the packet was to be routed out another serial port. This is

caused by an error in network programming. One possibility is that this terminal should

not be routing the destination, 0105 in the example, received from this port, port two in the

example, back out another port. Another other possibility is that the node originating the

page, which is 0002 in the example, does not have the inertia for the destination set high

enough.

- NET0002 packet too big 03:56:50p 1 7AL 2,0105N

Port two received an inbound packet that appeared to be too long, containing more than

1024 bytes. Generally, this is caused by noise or other problems on the link, or by

excessive traffic on a simplex or blind link.

- NET0002 packet bad CRC 03:57:12p 1 7AL 2,0105N

Port two received an inbound packet that failed the CRC error check. Generally, this is

caused by interference on the link. The constant appearance of this log message indicates

possible problems with the inter-node link, such as noise or low signal levels.

- NET0002 packet SUB-ETB 03:57:33p 1 7AL 2,0105N

Port two received an inbound packet that possibly had a non-standard control sequence.

The inter-block marker, the

<ETB> byte, appears to have arrived as an escaped character

pair,

<SUB>. Some TNPP implementations do this, and Zetron's TNPP can be

programmed to handle the condition. The other possibility is that the

<ETB> byte was

actually part of a page's message, however this is not very likely.

. NET0002 port unk node 03:59:02p 1 7AL 2,4444N

A network inbound packet was received at port 2, and the network card had not been

programmed to handle the destination node ID (“4444” in the example).

- 0099 test pg RS fail 09:59:15a 2 C TAP03D ID [ 16]

Sample of a failed ID page to a TAP outdial destination.

TNPP Link Tips - UDS 202T and Leased Line

When first connecting the modems, you will find it best to have an individual at each site

and in communication with each other. Verify that the modems are properly connected to

the telephone lines.

Note that in leased line, or 4-wire, mode the modem connection to the telephone line is

very similar to an RS-232 type connect in that there is a transmit pair of lines and a receive

pair. You must make sure that one modem has its transmit pair connected to the other

modem's receive pair.

First power the modems on and run their self-test by moving the front panel rotary switch

to the ST position. Verify that the TM LED is steadily on. If this LED is flashing, then the

modem is failing its internal tests.

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ZETRON 2000 Series Specifikace Strana 144