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Sipura SPA 2000 - VoIP Adapter

 CPU: ESS Visba 3 - ES3890F VCD Processor
 Ethernet controller: RTL8019AS
 Flash: SST39VF080 - 8Mbit (1MB)
 Memory: SCUTUM PVE0116S5V
 SLIC: Silicon Laboratories SI3210-KT

Connectors:

 36 pin expansion bus:
   5 - GND
   9 - LD0 (?)
  11 - LD1 (?)
  13 - LA0
  15 - LA1
  16 - CS1# (?)
  17 - LA2
  19 - LA3
  21 - LA4
  35 - VPP (+5v)

JP1:

  1 - 
  2 - 
  3 - exp36 pin 16

JP2:

   1 - Visba RESET#
   2 - GND

OEM Versions of SPA2000:

 Linksys PAP-2
 Linksys WRT54GP2 - FCC ID: Q87-WRT54GP2

The Sipura company was started by earlyer cisco employes that also developed the cisco ATA device some years ago...

The 36 pin connector on SPA2000 seems to be present on WRT54GP2 as well. Since the Visba does not seem to contain any JTAG pins, my guess is that this connector is used to program the flash. There are a few jumpers on the SPA. These might be used to switch between programming mode and running mode. It might also be possible that they can be used to signal some gpio pins to reset to factory defaults...

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