GL Communications has released its Multi-Link Frame Relay Emulator, a client server–based software application for T1 E1 hardware platforms. The MFR is similar to Multi-Link PPP, and both are a form of inverse multiplexing. Users rely on inverse multiplexing when access line capacity does not scale smoothly, such as big jumps in bandwidth from 56 kb/s, 1.544 Mb/s, and 45 Mb/s, according to the company.