Portabella Server linked to Portabella enables to peer both uplink and downlink bonding by a specific protocol between the host and the mobile by bonding multiple cellular networks to generate increased performance and reliability. The network aggregation depends on the model, sometimes 4. 6 or even cellular modems are combined to give the higher bandwidth in both uplink and downlink bonding. The Portabella Server will also act as a transparent proxy, enabling the Portabella with a bonded connection out to the public Internet. If you are using the Portabella with Mushroom Networks Broadband Bonding service, there will be no need of the Portabella Server to uplink and downlink bonding. As the Portabella server is the part of the Broadband Bonding service of Mushroom Networks. Portabella portable Internet access device has various models and all models support 3G bonding, 4G bonding and LTE bonding with some models also including Wi-Fi and wired Internet WAN ports.