Ex Vito ha scritto:
- Ports come down very frequenly: first L2 then L1 (see log below)
This is a "normal" behaviour in PMP... normal mean also it's
country/telco specific.
Which country?
1. In all due honesty, I don't know if the lines are PTP or PTMP.
You *must* know this! Ask your telco for pstn lines and the alcatel guys
about the pbx config.
However generally speaking a PTP configuration on ports betwen the * box
and pbx is better.
2. According to the logs, L2 goes down first, then L1, so I'd say the cabling
and termination is ok (I'd really not know when to
enable/disable the BN4S0
termination in the dip switches!). Is my reasoning correct ?
ISDN termination is another understimated, sometimes neglected thing,
each S0 bus, i.e. a connection betwen telco NT and user TE/PBX, must be
terminated on both sides. Usually telco NT provide an internal termination.
On a single bri using short cables bus impedance mismatches are
tolerable but using more than one BRI unterminated cabling can rise to
big instability.
Just my two cent (sorry about my bad english!).
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