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Opened 14 years ago
Last modified 14 years ago
#9 RESOLVED fault
GAT-4471 intermittent backhaul flap on the 868MHz control channel
| Reported by: | People & Places | Owned by: | S. Rao (Node Control) |
|---|---|---|---|
| Priority: | P2 | Milestone: | |
| Component: | Backhaul / Sub-GHz | Version: | |
| Keywords: | Cc: | ||
| Desk: | Estate & Systems | Legacy ref: | DEVCON-0731 |
Description
GAT-4471 (Gatso housing, A40 Westway) drops mesh association every 40–90s. LeafNut controller logs a NAK storm on the OSI-PLX handshake; Telensa CMS shows phantom ACKs against a stale RID. Suspected harmonic ingress on the 868MHz control channel from the adjacent densification cluster.
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Change History (4)
comment:1 by , 14 years ago
comment:2 by , 14 years ago
It's a sub-GHz flap, Pike, not a lookup. Harmonic traces back to GAT-4478 running hot.
comment:3 by , 14 years ago
Capacitor-bank sag on 4478's 450V rail pulling the oscillator off-frequency. Swap the bank, not the whip. Seen it a hundred times.
comment:4 by , 14 years ago
Bank swapped on 4478. 72h clean, dwell holds sync. Ken's right as usual. Closing.
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Have we ruled out DNS? The controller resolves the registry by name.