ITU-T Recommendation E.521 (11/88), in force, covers calculating the number of circuits in a group that carries overflow traffic.
Checked 2026-09-25
- Vendor
- vendor-neutral
- Product
- not restricted
- Subsystem
- trunk and port sizing
- Deployment
- carrier-network
- Region
- not restricted
- Release range
- E.521 (11/88)
- Checked
- 2026-09-25
Sources
- E.521 : Calculation of the number of circuits in a group carrying overflow traffic — ITU-T · tier 1 standards and regulators · Recommendation landing page: title and status fields
Cite this note
APA
WarmTransfer. (2026, September 25). Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-itu-e521-overflow. WarmTransfer. https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-itu-e521-overflow
BibTeX
@misc{warmtransfer-claim-erlang-traffic-engineering-itu-e521-overflow,
title = {Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-itu-e521-overflow},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-itu-e521-overflow},
note = {Source note erlang-traffic-engineering-itu-e521-overflow, checked 2026-09-25}
}