We're trying to set the battery-mode on an FXS port of a 924e Gen3 and the command doesn't seem to exist?
924e-gen3(config-fxs 0/1)#battery-mode
% Unrecognized command
The 924e Gen2 seems to have this command ...
924e-gen2(config-fxs 0/24)#battery-mode
auto - Automatically switch between high and low battery
(default)
high - Only use the high battery to feed tip/ring
low - Only use the low battery to feed tip/ring
Did it change on the Gen3? We need to set it to "battery-mode high" for a PBX that seems to not be happy with the current voltage/current levels.
It does seem to have been removed. This was to adjust loop current for long or short loops. Hardware in the Gen. 3 may do it automatically. You might want to verify tip and ring polarity and ensure that the PBX and the TA900 are both grounded to a common ground as this can cause issues. You can set the ring voltage level on the Gen 3 but not the loop current.
It's best practice to run a ground from telecommunication devices to a common ground and not rely on the third-wire in the AC cords. There's a ground stud on the back of the TA900 for this purpose and most PBXs also have this provision. It's essential for ground-start trunks and also for detecting ringing in some scenarios. If practical, use the same grounding point as the telco protector at the demarc.
It does seem to have been removed. This was to adjust loop current for long or short loops. Hardware in the Gen. 3 may do it automatically. You might want to verify tip and ring polarity and ensure that the PBX and the TA900 are both grounded to a common ground as this can cause issues. You can set the ring voltage level on the Gen 3 but not the loop current.
Automatically? Heh, I'd like to set it myself, even when the Gen3 thinks it may know better, I have a old picky PBX that likes high current even on a short loop.
Are you talking about a common ground on the electrical outlet? The Adtran and PBX are fed off the same outlet, so they are "commonly" grounded. Or are you referring to having a ground strap between the Adtran and PBX?
It's best practice to run a ground from telecommunication devices to a common ground and not rely on the third-wire in the AC cords. There's a ground stud on the back of the TA900 for this purpose and most PBXs also have this provision. It's essential for ground-start trunks and also for detecting ringing in some scenarios. If practical, use the same grounding point as the telco protector at the demarc.