diff options
author | Yuuta Liang <yuuta@yuuta.moe> | 2023-11-09 09:16:31 +0800 |
---|---|---|
committer | Yuuta Liang <yuuta@yuuta.moe> | 2023-11-09 09:16:31 +0800 |
commit | d3d5848a5f6d0a4d55f194972a158795c286d818 (patch) | |
tree | 63fbf6fc761eee49d8afdd44f68cc3542ea3a4b3 | |
parent | 035ab6c5d93bc34202f70a78217d65641982ae8f (diff) | |
download | kb-d3d5848a5f6d0a4d55f194972a158795c286d818.tar kb-d3d5848a5f6d0a4d55f194972a158795c286d818.tar.gz kb-d3d5848a5f6d0a4d55f194972a158795c286d818.tar.bz2 kb-d3d5848a5f6d0a4d55f194972a158795c286d818.zip |
AP7921
-rw-r--r-- | docs/sysadmin/misc/ap7921.md | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/docs/sysadmin/misc/ap7921.md b/docs/sysadmin/misc/ap7921.md index a68f138..4ecf6a0 100644 --- a/docs/sysadmin/misc/ap7921.md +++ b/docs/sysadmin/misc/ap7921.md @@ -1 +1,53 @@ # APC AP7921 + +AP7921 is a 1U 8-outlets switched PDU from APC. + +* No per-out metering. +* Outlet is C14; Input is C20. +* Although spec says 220V input, 110V also works. +* AVR control plane. +* Only supports old cipher like 3DES. +* The meter precision is lower than AP7921B. +* The console is menu-based and is pretty hard to use (AP7921B is console-based). + +## Console Cable + +AP7921 has a reset button, but it only allows temporary logon to the serial +console via default username and password (`apc` / `apc`). It won't reset web +portal password. Thus, you have to get a console cable if you loss the password. + +Even worse, APC uses the wired RJ12 connector for console rather than RS232 or +RJ45. Instead of buying a cable, I highly recommend you to make your own. + +Ingredients: + +* RJ12 male connector: Must be 4pin / 6pin. 2pin RJ11 won't work. +* RS232 female connector + +Wiring: + +``` + RS232 F RJ12 M + ┌──┐ +┌─────────┐ ┌┴──┴┐ +│5 4 3 2 1│ ┌─┘ └─┐ +└┐9 8 7 6┌┘ │ 654321 │ + └───────┘ └────────┘ +Female 5GND Male + Front Facing + GND 5──────────5 + TX 2───────────4 + RX 3────────────3 + GND 5─────────────2 +``` + +Taken from +[pinoutguide.com/UPS/apc_940-0144a_cable_pinout.shtml](https://pinoutguide.com/UPS/apc_940-0144a_cable_pinout.shtml) +but swapped RX and TX. + +Serial parameters: + +* Baud rate: 9600 +* No stop bit + +You need to press enter several times for the login prompt to show up. |