Hardware
PBX
KX-TAW848
- Modules
Figure 1: TAW848 Module Arrangement - MSG2
- KX-TAW84891 2-Channel Message Card
- EXT-CID
- KX-TAW84868 Extension Caller ID Card
- ECHO8
- KX-TAW84866 8-Channel Echo Canceller Card
- DPH4
- KX-TAW84861 4-Port Doorphone Card
- LCOT4
- KX-TAW84880 4-Port Analog Trunk Card (2)
- CID4
- KX-TAW84893 4-Port Caller ID Card (LCOT4 Daughterboard, not shown)
- HLC4
- KX-TAW84870 4-Port Hybrid Extension Card (1+1 integrated)
- PLC8
- KX-TAW84876 8-Port Proprietary Extension Card
- SLC8
- KX-TAW84874 8-Port Single Line Telephone Extension Card
- Broken serial port
RS-232 interface never worked on my unit. Nothing visually suspect. I considered replacing the MC1488/MC1489 line drivers, but they're not that easy to get in the surface mount packages. There's also a TI LV11A (triple 3-input AND) on the serial lines (under the board) that is another suspect.