In technologies that use dynamic Abis and TRX signaling by a common Lapd, this can become congested if it exceeds a certain number of TRX. With a number of 12 TRX is better the creation of a second Lapd and sharing TRX load between them. The maximum number of TRX by Lapd depends on the traffic and signaling load in the air interface, that is on the coverage area that is serving the cell.