Patent ID: 7277452

Claim:
A method of updating a first look-up table associated with a TDM-packet conversion function and a second look-up table associated with a corresponding packet-TDM conversion function which are coupled together via a packet network, each look-up table mapping one or more TDM channels onto a packet network flow, the method comprising: priming a controller with data for updating the first and second look-up tables in advance of the transmission of packets from the TDM-packet conversion function to the packet-TDM conversion function containing data to which the update relates; incorporating a flag in each packet sent over the packet network from the TDM-packet to the packet-TDM conversion function, the flag being set to indicate whether or not a packet is the first packet to which the update relates; and detecting the setting of said flag in said first packet and in response updating the second look-up table with the update data.