What is DS3?
DS3 or Digital Signal level 3 is a standardized TDM service offering a bandwidth of 45 Mbps. It may be delivered over SONET fiber optic service or over copper coaxial cable. When delivered over copper, the line is generally referred to as a T3 line.

When to Use Pseudowires
A pseudowire is a virtual "circuit" that emulates a traditional digital telecom service but on a packet switched network. MPLS networks are especially suitable for pseudowires. By using a pseudowire circuit, you can get the point to point connectivity you desire without having to re-engineer your facilities to accommodate a different protocol network.

DS3 for Call Center Telephony
DS3 voice service can support up to 672 simultaneous telephone conversations without blocking. If your call center or large corporate PBX system requires this number of outside lines, DS3 is likely far more cost effective than ordering the equivalent 28 T1 lines.

DS3 as Ethernet Transport
DS3 bandwidth at 45 Mbps can easily transport 10 Mbps Ethernet over SONET or T3 line, even with the additional overhead needed to convert from packet to TDM back to packet protocol. For Fast Ethernet transport, an OC3 service at 155 Mbps would be required.

Difference Between DSL and DS3
DSL means Digital Subscriber Line and is a shared bandwidth service offered on a "best effort" basis by telephone companies. DS3 is a professional telecom service with a fixed bandwidth of 45 Mbps both upload and download. DS3 is usually sold with on a contract with a service level agreement.

Carrier Ethernet WAN & DS3 Bandwidth
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