Come on and DSLAM!
Two Siemens Surpass DSLAMs, one ADSL one VDSL.
mciancia, implr and q3k are looking at this.
Access
Lab ADSL DSLAM (HiX 5620 A50) can be reached by telnet 185.236.240.67 2137 from boston-packets or the space LAN.
Downloads
Documentation and firmware (search engine proof):
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FXS
We have a companion FXS rack device, Audio Codes MP-124D/FXS/AC. It's currently at q3k's place.
Components
- Main MCU: PowerQUICC MPC860PZQ80D4
- Line interface: 12x PEB3264 and PEB4266
- Custom ASICs (codecs?): 6x AC482-C (three more footprints unpopulated)
PSU Recap
The output smoothing caps on the PSU (APSI-605AC Rev.C) are bad. Here's the values jotted down so that q3k can order some new ones:
| Refdes | Capacitance | Voltage | Diameter | Height | Lead spacing | Replacement |
|---|---|---|---|---|---|---|
| C9, C10, C14 | 470uF | 63V | 16mm | 20mm | 7.5mm | EEU-FS1K471S |
| C15, C17, | 220uF | 100V | 16mm | 25mm | 7.5mm | UHE2A221MHD6TN |
| C19, C20, C22 | 1200uF | 10V | 10mm | 20mm | 5mm | EEU-FS1E122B |
C19 is bulged. C10 is burst. The rest look fine (after desoldering, no, the bottom plugs are also slightly pushed out on some of the others - good call to replace them regardless), but should be replaced regardless.
There's also a primary side 100uF/400V cap (C13) that has been measured to be ~97uF, which is good enough so is left alone for now.
JTAG Pinout
Refdes J8 'JTAG'.
| Function | Pin | Pin | Function |
|---|---|---|---|
| Diode | 1 | 2 | Diode |
| Diode | 3 | 4 | GND |
| 3v3? | 5 | 6 | GND |
| Hi-Z | 7 | 8 | GND |
| Hi-Z | 9 | 10 | GND |
| Diode | 11 | 12 | GND |
| Hi-Z | 13 | 14 | Hi-Z |
| Hi-Z | 15 | 16 | Diode |
| Hi-Z | 17 | 18 | Hi-Z |
| Hi-Z | 19 | 20 | Hi-Z |
Diode means a diode was detected (0.3V-1.6V) from that pin to ground. Hi-z means there didn't seem to be a diode between that pin to ground. This looks like a custom JTAG connector, q3k will attempt to discover the pinout once the PSU is fixed.
There's also a BDM connector on board.