Have anybody tested to extend the length of the failover cable in configuration with two pixes working in failover?. Some clients are willing to put a pix in one room and the secondary (failover) in another room for safety.
I'd like to understand if there are many problems in using a customized failver cable so assembled:
all the pins (except pin 2 and 3, Tx and Rx) wired directly as in the pinouts description of Cisco tech docs: they are 7 wires and it is possible to carry them on a normal 4-pairs UTP cable
pins 2 and 3 (referred to pin 5 = Ground, of course) carried by a baseband modem on a normal two-pairs cable.
The idea is that all the managing failover functions, that are based on detecting DC power levels on the wires of the first group, may work with long cable also (I suppose many hundreds of meters).
The data flow at 115Kbps is supported by baseband modem and it is able to run also to many hundreds of meters.
I think that it is possible only a problem: if a modem fails the situation, as seen by the other PIX, is analogue to a PIX up but not working and a failover may occur with two PIX running (bad situation). I don't Know if the simultaneous use of a stateful (FastEthernet) failover conncetion may avoid this problem.
Is there anyone, maybe in Cisco Tech Dep., who is able to confirm if this configuration may work?
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