March 21, 2012

BCM1115 Module Circuits to Ethernet port, Enterprise IP Phone products

ajiewwHere is the important modules integrated in the BCM1115 include:

  • The modules of MIPS32 100-MHz processor with 8K 2-way set associative Icache and a 4K 2-way associative D-cache. This MCU supports the VoIP protocol stacks, jitter buffer management, and application program. Programming is done in C, on top of Broadcom’s object-oriented signal processing API.
  • You can find that ZSP 108-MHz DSP with 48 KB of instruction RAM and 32 KB of data RAM. The DSP supports a wide range of vocoders and a variety of telephony algorithms (e.g., DTMF and Call Progress Tones.)
  • Two DACs and two ADCs are integrated,eliminating the need for an analog switch to allow the sharing of a codec between multiple interfaces.
  • Modules of 10/100BASE-T Media Access Controller and Transceiver. The Media Access Controller (MAC) supports 802.1p prioritization of voice packets and 802.1Q VLAN support for segmenting physical networks into multiple logical networks.


All of the functions for 100BASE-T Ethernet in full- or half-duplex mode over Category (CAT) 5 twisted pair cabling and 10BASE-T Ethernet in full- or halfduplex mode over CAT 3, 4, or 5 twisted-pair cable. The PHY also supports auto-MDI/MDIX detection to allow the use of any cable type. The transceiver integrates support for in-line powering over Ethernet.