 support Bandwidth Policing-Per Flow (RTP)? Does the product support RTCP? Does the product support DSCP/Diffserv? Does the product support QoS reporting? Does the product support Session Admission Control (SAC) or CAC? Does the product support IEEE 802.3p/q? Does the product support Echo cancellation? Does the product support Delay monitoring? Does the product support Jitter monitoring? Chapter 9: Questions to Ask of a Service Provider Offering and an SBC Vendor Does the product support packet loss monitoring? Does the product support Voice Activity Detection (VAD)? Interworking Support Interworking is one of the primary functions of an SBC. As an SBC sits at the edge of the network, it has to ensure that different kinds of signaling, coder-decorder (codec), DTMF (dual-tone multifrequency), security measures, and SO on work seamlessly between incom- ing and outgoing sessions. We identify the major interworking topics here. But because we are experiencing significant new developments in the field of unified communications (UC), you might need to check the latest developments to ensure the interworking. Usually the vendors release new software to update their interworking features. You can check the basic interworking features (discussed in the following sections) during your RFP process. Codecs Support Codec plays an important role in the UC network. You might need to change your net- work parameters (CPU capability, bandwidth, Digital Signaling Processing, and SO on) to accommodate different kinds of audio and video codecs. Moreover, you might see new codecs in the market while designing and deploying your network. Recently, we have seen two new codecs-internet Low Bitrate Codec (iLBC) and internet Speech Audio Codec (iSAC)-developed by Global IP Solutions (GIPS). These have received very good responses in the industry. Both the codecs work better than other existing codecs in the network with packet loss. Here is the list of questions to check the support of different kind of codecs and related technologies. Yo