![]() Increased call completion as SS7 is out of band packet based signaling protocol and single packets having all information transmitted faster than tones generated one at a time across in in-band networks.Reduced post dialing delay as there is no need to transmit DTMF tone on each hop of the PSTN.Some of the benefits of SS7 are outlined below: These CLASS services depend on the end office switches and the SS7 network. SS7 is a method of sending messages between switches for basic call control and for CLASS. Network to network signaling also uses out of band signaling knows as signaling system 7 (SS7).MF tones are sent in-band and MF signals from switch to switch. MF is similar to DTMF but uses a different set of frequencies. Network to network signaling comprises of multi-frequency and Robbed bit signaling. It is normally carried across the transmission media over T1/E1 carrier over twisted pair, T3/E3, T4 carrier over coaxial cable, T3, T4 carrier over a microwave link, Synchronous optical network across fiber media. Network to Network Signaling – This dictates how switches in the PSTN intercommunicate. Call completion is greatly increased because setup messages are not subject to noise as in case of DTMF tones. ![]()
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