E1 Trunk service, which is normally named as DID (Direct Inward Dialing) is to provide connection link between service provider’s Central Exchange and customer’s internal one. Such one circuit enables 30 calls to be made simultaneously.

E1 trunk service is particularly suitable for groups and large enterprises operating in the sectors such as e-commerce, telephone marketing, providing computer products, information technology, banking, financial services, credit, insurance, transportation and shipping agents, hotels, schools ... often have to use the phone as online transactions with a large number of customers.

Why enterprises should choose Viettel’s E1 Trunk service?

• High voice quality: E1 Trunk service establishes direct link between service provider’s Central Exchange to client’s PABX. Due to no other intermediary transition, voice quality is therefore more assured and confidential than ordinary calls for individual customers.
• Stable signal: E1 Trunk is deployed with fiber optic cable which has little effect of external environment elements. Hence, voice signal is sustained.
• Cost effectiveness: charges for using trunk E1 are less than using ordinary PSTN.
• Flexibility: Easily expand enterprise’s telephone system only on one input signal and extend number of subscriber with no limit.

Technical description:

• E1 Trunk is deployed with fiber optic cable at speed of 2Mbps.
• Declare unlimited telephone numbers on one line of E1.
• 30 voice lines can be made simultaneously. Each line has speed of 64kbps (2048 kbps = 32*64 kbps) and 2 signal lines.
• Client’s PABX is required to have E1 interface using SS7 or R2 signaling.

Offical pricelist for customers:

All pricing has included VAT (10%).

For more details about service and service policy, kindly contact us via our direct sales number 19008098 (Free charging for Viettel subscribers and 1,000 VND/minute for off-net subscribers).