AT&T SB35025 Syn248 SB35025 Corded Deskset Phone System, for Use with SB35010 Analog Gateway Sold as 1 EA. A feature-rich communications solution. Supports up to 24 extensions and eight lines. Simple to install, simple to use, simple to manage. Plug-and-talk technology for today's "need-it-now" culture. Large backlit displays.