Besides the "normal" network architecture with a central network element and standardised CPEs at the customer location single routes have to be installed from time to time that are not connected via a central network element.
The most important characteristic of these systems is seamless long-time operation as they are operated as a rule without a network management system and thus without central monitoring.
KEYMILE offers various products for for desktop-desktop applications
| Desktop | Network interface | Subscriber interface |
| MUSIC 100 | 1 pair HDSL (TDM) | 4 x 10BaseT |
| TUNOR | 2 fibre 8 Mbps monomode / multimode | 4 x E1 incl. 1 x ISDN (PRA) |
| LineRunner DSL | SHDSL (TDM) with up to 4,6 Mbps | 10/100BaseT with up to 4,6 Mbps X.21, V.35, V.36, G.703/G.704 with up to 2 Mbps Sub rates for V.24, V.25, V.36, X.21 |