Busy hour traffic in erlangs is BHCA multiplied by average handle time in seconds, divided by 3600 (equivalently BHCA times AHT in minutes divided by 60).
Checked 2026-09-25
BHT = (BHCA * AHT seconds) / 3600
- Vendor
- Cisco
- Product
- Unified Contact Center Enterprise
- Subsystem
- traffic engineering terminology
- 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 · Contact Center Traffic Terminology > Busy Hour Traffic (BHT) in Erlangs
Cite this note
APA
WarmTransfer. (2026, September 25). Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-bht-formula. WarmTransfer. https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-bht-formula
BibTeX
@misc{warmtransfer-claim-erlang-traffic-engineering-bht-formula,
title = {Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-bht-formula},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-bht-formula},
note = {Source note erlang-traffic-engineering-bht-formula, checked 2026-09-25}
}