What is a significant advantage of SIP Trunking compared to traditional E1 or T1 links?

The significant advantage of SIP Trunking compared to traditional E1 or T1 links is the lower rental cost per trunk. SIP Trunking operates over the internet rather than requiring dedicated circuits like E1 or T1 lines, which can be expensive to maintain due to their physical infrastructure and associated fees. By using existing internet connections, businesses can reduce their telecommunications costs significantly.

Additionally, SIP Trunking allows for greater flexibility and scalability, enabling organizations to pay only for the amount of capacity they need, rather than being locked into fixed line costs with traditional trunks. The ability to add or remove trunks as needed further helps keep costs down while accommodating business growth or changes.

The other options either imply higher costs or incompatibility, factors that run contrary to the main benefits associated with SIP Trunking. This focus on cost efficiency and operational scalability makes SIP Trunking a more attractive option for many organizations looking to modernize their communication systems.