Doesn't suit? No problem! You can return within 30 days
You won't go wrong with a gift voucher. The gift recipient can choose anything from our offer.
30-day return policy
Session Initiation Protocol (SIP) is a signaling protocol used for VoIP, instant messaging, online games, and other multimedia elements. This practical guide covers registration procedures within an SIP network, security, SIP Response Codes, and extending SIP to support various functions. It helps in maintaining and troubleshooting an SIP network.