Digital Trunks: Digital Switched Services (DSS)

Qwest Digital Switched Service

Integrated Voice Services for Your Evolving Business Needs

Qwest^® Digital Switched Service (DSS) offers fast, easy and reliable voice services—free of crosstalk, amplified noise or distortion—over a digital transport. DSS can support your analog and digital voice needs with basic and advanced functionalities. DSS also provides consistently better quality transmission with fewer errors and greater dependability. It’s a practical and affordable way to configure your telecommunication system to best meet the growing demands of your business.

Description

DSS includes a DS-1 facility, common equipment, local-exchange switching and flat-usage trunks for access to the local exchange network. Each DSS facility utilizes 24 channels configured as either basic or advanced trunks, or a combination of both. Basic service offers in-only, out-only and two-way PBX trunks. Advanced service offers additional functionality including two-way trunks with Direct Inward Dialing (DID) and answer supervision or out-only trunks with answer supervision and one-way direct outward dial (DOD). Caller ID is available only with Basic DSS.

Features

• Answer supervision—Special trunk arrangements provide answer-back central office signaling to identify when a private branch exchange (PBX) call is completed.
• Advanced DSS provides DID services which:
  • Optimizes the 24 channels and,
  • Bypasses the need for an attendant.
• Video and data transfer—Two-way data trunks offer video applications and 56 Kbps data transfer.
• Options—Basic DSS has available standard-class CLASS and line-side services including call waiting, call forwarding and caller ID. Caller ID available only with Basic DSS.
• Accessible—Available remote local area network (LAN) access.

Benefits

• Provides a clear signal, free of crosstalk, amplified noise and distortion.
• Features sub-second response time with nearly error-free performance.
• Uses a direct DS-1 interface to your PBX.
• Eliminates costly analog-to-digital conversion equipment.
• Provides increased trunking efficiencies with two-way DID.
• Can be provisioned on a DS-3 or higher transport.
• Customized configured trunks to meet your specific needs.

How it works

At the central office, the facility is multiplexed by a D4 multiplexer onto basic and/or advanced trunks and connects to the public switched telephone network (PSTN). With Qwest DSS, the DS-1 passes from the central office to the DS-1 interface to the channel service unit/data service unit (CSU/DSU) and then to the customer’s digital PBX. Outbound caller ID does not work with DSS advanced trunks.

Why buy from Qwest?

• The Qwest Spirit of Service^® ensures you receive exceptional service and support from a communications partner that works with you to develop the right solutions for your business.
• Qwest provides 24/7 customer care.
• Qwest is a proven communications provider with years of experience.

Other products available from Qwest

In addition to Qwest Digital Switched Service, Qwest has an array of products to meet your needs including:

• Long Distance
• Toll Free
• Conferencing
• Q Routing^®
• Qwest iQ^® Networking^®
• Qwest^® Private Line