Cisco lists the inputs for Erlang calculators as BHCA, average handle time for each resource, service level (percentage answered within x seconds), and the grade of service (percent blockage) wanted for trunks and VRU ports.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Contact Center Enterprise
- Subsystem
- traffic model selection
- Deployment
- on-premises
- Region
- not restricted
- Release range
- 15.0(1)
- Checked
- 2026-09-25
Sources
- Solution Design Guide for Cisco Unified Contact Center Enterprise, Release 15.0(1) - Sizing and Operating Conditions for Reference Designs — Cisco Systems · tier 2 current vendor documentation · Erlang Calculators as Design Tools > required inputs list
Cite this note
APA
WarmTransfer. (2026, September 25). Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-calculator-inputs. WarmTransfer. https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-calculator-inputs
BibTeX
@misc{warmtransfer-claim-erlang-traffic-engineering-calculator-inputs,
title = {Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-calculator-inputs},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-calculator-inputs},
note = {Source note erlang-traffic-engineering-calculator-inputs, checked 2026-09-25}
}