1 TO PART A: SERVICE LEVELS AND SERVICE LEVEL MEASUREMENT This Annex 1 to Part A sets out the Service Levels in paragraph 1 and the Service Level measurements in paragraph 2. SERVICE LEVELS HSCN Connectivity Service (ref 1-SL) The Service Levels in the below are applicable to each Standalone Service Instance of a HSCN Connectivity Service and Integrated Service Instance Set which includes a HSCN Connectivity Service. 1-SL-1: Non-Resilient (lower availability) is for HSCN Obligations Framework TOW16 services; 1-SL-1: Resilient (lower availability) is for HSCN Obligations Framework TOW16 services; 1-SL-1: Fully Resilient Diverse Routing is above the minimum value in the HSCN Obligations Framework. 1-SL-3, 1-SL-4 and 1-SL-5: DSL connection is an HSCN Obligation Framework TOW16 service. Where a Service Instance of a PSN Access Connectivity Service comprises a PSN VRF 701 over an HSCN Connectivity Service, the Service Levels applicable to the HSCN WAN specified below will encompass both the HSCN WAN and the PSN DNSP Service Slice (as set out in more detail in paragraph 2 of this Annex 1 to Part A of Call Off Schedule 6). Service Level Target Service Failure Ref Service % (a) Threshold % (b) 1-SL-1 HSCN WAN Availability Non-Resilient 99.95% 99% Resilient The greater of The greater of 99.5% 1-SL-2 99.99% or the or the applicable applicable Service Service Failure Level Threshold for Threshold for 1-SL-1.
1 TO PART A: SERVICE LEVELS AND SERVICE LEVEL MEASUREMENT This Annex 1 to Part A sets out the Service Levels in paragraph 1 and the Service Level measurements in paragraph 2. SERVICE LEVELS HSCN Connectivity Service (ref 1-SL) The Service Levels in the below are applicable to each Standalone Service Instance of a HSCN Connectivity Service and Integrated Service Instance Set which includes a HSCN Connectivity Service. 1-SL-1: Non-Resilient (lower availability) is for HSCN Obligations Framework TOW16 services; 1-SL-1: Resilient (lower availability) is for HSCN Obligations Framework TOW16 services; 1-SL-1: Fully Resilient Diverse Routing is above the minimum value in the HSCN Obligations Framework. 1-SL-3, 1-SL-4 and 1-SL-5: DSL connection is an HSCN Obligation Framework TOW16 service. Where a Service Instance of a PSN Access Connectivity Service comprises a PSN VRF 701 over an HSCN Connectivity Service, the Service Levels applicable to the HSCN WAN specified below will encompass both the HSCN WAN and the PSN DNSP Service Slice (as set out in more detail in paragraph 2 of this Annex 1 to Part A of Call Off Schedule 6). Ref Service Service Level Target % (a) Service Failure Threshold % (b) 1-SL-1 1-SL-2 HSCN WAN Availability Non-Resilient Resilient 99.95% The greater of 99.99% or the applicable Service Level Threshold for 99% The greater of 99.5% or the applicable Service Failure Threshold for 1-SL-1.
RM3825%20DPS%20Call%20Off%20Terms%20v6.1_1.docx