Introduced in early 2009, the Gigaset SL78H is the top-of-the-line cordless handset that they offer in North America.
Like the C59H and S79H, the SL78H is only being offered as an expansion handset with respect to the IP-capable A580IP and S675IP systems. You may see it offered as part of the SL780 or SL785, but these are not IP-capable systems.
As I’ve moved up the product range there has been a natural progression in features and physical attributes. Each better model builds logically upon the previous, but adds certain improvements in hardware or software.
At the top of the range the SL78H is physically a very different device. To start, it’s heavy. Unlike the prior models there is a lot of metal in the SL78H. Even the keypad itself has a brushed-metallic finish.