Systems and methods for hair pinning time-division multiplexing calls across time domains

摘要

A system for hair pinning-time division multiplexing (TDM) calls has a gateway positioned between a non-TDM network and communication equipment coupled to the gateway via a plurality of TDM lines. The gateway has a plurality of signal processing elements configured to encapsulate the TDM call data into a plurality of packets utilizing a protocol suitable for transmission through the network, and each signal processing element has its own time domain such that the signal processing elements operate asynchronously. The gateway also has a central processing element configured to forward the packets to the network via the network protocol. The central processing element is further configured to identify packets which are mapped to channels of TDM lines coupled to the gateway and to forward the packets to the appropriate signal processing element for transmission through the appropriate TDM channel. Accordingly, hair pinning across asynchronous time domains is achieved within the gateway.

主权项

1. A gateway for hair pinning time division multiplexing (TDM) calls across asynchronous time domains, the gateway comprising:
a network interface coupled to a non-TDM communication network; a first signal processing element coupled to a first TDM line, the first signal processing element configured to receive a first TDM call via the first TDM line and convert data from the first TDM call into a first data packet compatible with the non-TDM communication network; a second signal processing element coupled to a second TDM line, the second signal processing element configured to receive a second TDM call via the second TDM line and convert data from the second TDM call into a second data packet compatible with the non-TDM communication network; and control logic configured to receive the first data packet from the first signal processing element, the second data packet from the second signal processing element, and a plurality of data packets from the first signal processing element and the second signal processing element, the control logic configured to forward each of the plurality of data packets to the network interface for transmission of each of the plurality of data packets from the network interface to the non-TDM communication network, the control logic further configured to determine whether the first TDM call is to be hair pinned and to forward the first data packet directly to the second signal processing element without the gateway transmitting the first data packet to the non-TDM communication network in response to a determination that the first TDM call is to be hair pinned, the second signal processing element further configured to transmit data from the first data packet across the second TDM line, wherein the first signal processing element and the second signal processing element operate asynchronously such that a first time domain of the first signal processing element for processing TDM calls for the first TDM line is different than a second time domain of the second signal processing element for processing TDM calls for the second TDM line, wherein the first data packet is not synchronized with the second time domain at ingress to the second signal processing element, and wherein the second signal processing element is configured to adjust a timing of the first data packet to accommodate a timing difference between the timing of the first data packet and the second time domain.