# Hardware differences: AG 4040 to CG 6060

The following table describes the hardware differences between AG 4040 and CG 6060 boards:

Item | AG 4040 board | CG 6060 board
Board status LEDs | No board status LEDs. | Red, yellow, and green board status LEDs.
Bus support | Supports 32-bit, 33 MHz PCI bus. | Supports 32-bit, 33 MHz or 66 MHz PCI bus.
CAS signaling | Processed in a DSP. | Processed in the framer.
Connections | Limited to 256 simple connections on the H.100 bus. | Can simultaneously connect (simplex) to all 4096 timeslots on the H.100 bus.
CT bus timeslot connections | A connection to or from a CT bus timeslot will fail if the timeslot is already connected in the other direction. | If a connection is made to or from a CT bus timeslot, any existing connection in the other direction on that timeslot is disconnected.
DSP connections | Each DSP core has its own 64-slot TSI stream. | Four DSP cores per TSI stream. Each local TSI stream has 128 timeslots.
DSPs | C549 DSP. Each chip has two cores. 100 MIPS per DSP core. Maximum 40 cores, 4000 MIPS. | C5441 DSP. Each chip has four cores. 133 MIPS per DSP core. Maximum 32 cores, 4256 MIPS.
E1 impedance | E1 impedance default is 120 ohms but switch selectable to 75 ohm. | E1 impedance is software configurable to 75 ohm, 100 ohm, 120 ohm, or high impedance.
Echo cancellation | Software echo cancellation. | Proprietary echo cancellation chip. Software echo cancellation is also available.
Ethernet | No Ethernet connectivity. | Dual 10/100Base-T Ethernet with LED speed and activity indicators on the sockets.
Signaling | Signaling is switchable from trunk-to-trunk and between trunks and the CT bus. | Does not support switch signaling from trunk-to-trunk or between trunks and the bus, only between trunks and DSPs.
Stream speed | The default stream speed for CT bus streams 0 through 15 is 2 Mbit/s. | All CT bus streams operate at 8 Mbit/s only.
Timeslot Interchangers (TSI) | Dual Agere T8100A. | Proprietary.
Trunk interface jacks | Four RJ-48C trunk interface jacks. | Two Dialogic® MD1 RJ-45 trunk interface jacks. A splitter cable is required to access the second trunk on each jack.
Trunk LEDs | Red, yellow, and green LED per trunk. | Red, yellow, or OFF LED per trunk.