The Cisco uBR-MC88V is capable of eight downstream (Annex A or Annex B) and eight upstream channels. The port count remains exactly the same as the Cisco uBR-MC28U, with two downstream ports and eight upstream ports. This enables the Cisco uBR-MC88V to offer a simple upgrade path from the older line card used on the Cisco uBR7200VXR platform without any change to the cable wiring. Each downstream port is capable of carrying four frequency-stacked downstream channels. Each downstream channel is configurable as part of DOCSIS 3.0 channel bonding or DOCSIS 2.0/1.x channel. The line card also supports an extended DOCSIS upstream frequency range of 5 to 65 MHz and downstream of 70 MHz to 1 GHz for DOCSIS operations.