One CCS (centum call second) is 100 seconds of calls on the same circuit, and 1 erlang equals 36 CCS; voice switches generally measure traffic in CCS.
Checked 2026-09-25
1 erlang = 36 CCS
- Vendor
- Cisco
- Product
- Cisco IOS VoIP solutions
- Subsystem
- traffic engineering terminology
- Deployment
- on-premises
- Region
- not restricted
- Release range
- document updated 2001-07-02
- Checked
- 2026-09-25
Sources
- Traffic Analysis — Cisco Systems · tier 2 current vendor documentation · Traffic Theory Basics > CCS
Cite this note
APA
WarmTransfer. (2026, September 25). Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-ccs-conversion. WarmTransfer. https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-ccs-conversion
BibTeX
@misc{warmtransfer-claim-erlang-traffic-engineering-ccs-conversion,
title = {Erlang B and Erlang C for voice and contact center sizing: source note erlang-traffic-engineering-ccs-conversion},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/erlang-traffic-engineering-ccs-conversion},
note = {Source note erlang-traffic-engineering-ccs-conversion, checked 2026-09-25}
}