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FYI: To add the 1140 expansion modu

FYI: To add the 1140 expansion modu

FYI: To add the 1140 expansion modu

(OP)
To add the 1140 expansion module to a phone, you'll need to LD 11 change (easy chg) the set's TN programming to at least: KEM 1

...likely in addition to having CLS KEM3.

Easy way to remember: KEM (Key Expansion Module). KEM 1 (or 2) enables up to 79 keys.

With the Shift button, I now have a total of 67 keys (18x2 more) that I would need to program in order to see them appear in the PRT TNB of the set.

Note: The backlight of the expansion module will only light if using a local power supply (ie: won't light with PoE).

If that doesn't solve your issue, it might be a firmware issue as seen in this thread here:
thread798-1440880: 1140e IP Phone Expansion Module

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