US Signal stands behind its products and provides industry leading Service Level Agreements ensuring complete network performance. Our Service Level Agreements provide you with peace of mind knowing your network can support any application.
Service Availability
Availability Performance is the percentage of time within a specified time interval during which the Frame Loss Ratio Performance is small. A circuit is considered unavailable when there is a complete loss of use.
Mean One-Way Latency (Mean One-Way Frame/Packet Delay)
The One-Way Frame Delay for an egress Service Frame at a given Interface in the EVC is defined as the perceived time elapsed from the reception at the ingress interface of the first bit of the corresponding ingress Service Frame until the transmission of the last bit of the Service Frame at the given interface for a particular Class of Service Identifier. To obtain the Mean One-Way Frame Delay, statistics are gathered and averaged over the period of 1 month.
Mean Jitter (Mean Frame/Packet Delay Variation)
Frame Delay Variation is the difference between the one-way delays of a pair of selected Service Frames for a particular Class of Service Identifier and an ordered pair of interfaces. To obtain the Mean Frame Delay Variation, statistics are gathered and averaged over the period of 1 month.
Frame Loss Ratio
Frame loss is a measure of the number of lost service frames inside the network for a particular Class of Service Identifier. Frame loss ratio is; % = # frames lost / # frames sent over a period 1 month.
SLA coverage
Depending on the technology, US Signal handles SLA’s based on several different network/technology domains.
- Core Domain i.e.(Between Core POP’s across MPLS backbone)
- Edge Domain i.e. (Metro Ethernet Networks)
- Access Domain i.e. (Last Mile Access)
Latency, Frame Loss and Jitter metrics are measured and provided in the Core Domain. The Availability Metric is measured and provided in the Core and Edge Domains. SLA’s do not extend to the Access Domain.
