Thomson SpeedTouch 780 WL

User's guide

The FCC ID appears to apply to multple models (which are listed below)...
 * SpeedTouch 780 WL
 * DSLBB643 EB
 * DSLBB843 EB
 * DSLBB643 EE
 * SpeedTouch 706 WL
 * DSLBB643 ED
 * DSLBB843 ED
 * DSLBB843 EF

On the OpenWrt wiki

There appears to be an Infineon (?? or not) chip on-board to handle VoIP.

The default SSID is probably SpeedTouchXXXXXX, where XXXXXX is probably some combination hex digits (probably upper case letters). Administrator:blank is probably the default Telnet and FTP password. HTTP web configuration may be (by default) unprotected.