Sangoma names choosing NCRC4 where CRC4 is needed (or the reverse) in the FE_FRAME setting as a common cause of an E1 PRI bouncing, fixed by editing the wanpipe configuration file and restarting wanpipe.
Checked 2026-10-02
- Vendor
- Sangoma
- Product
- Wanpipe
- Subsystem
- telephony card driver
- Deployment
- on-premises
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Telephony Cards - PRI-PRI Bouncing UP and Down — Sangoma Technologies · tier 2 current vendor documentation · E1 frame configuration section
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting PRI circuits that are down or dropping calls: source note pri-circuit-troubleshooting-wanpipe-crc4-mismatch. WarmTransfer. https://warmtransfer.net/knowledge/claims/pri-circuit-troubleshooting-wanpipe-crc4-mismatch
BibTeX
@misc{warmtransfer-claim-pri-circuit-troubleshooting-wanpipe-crc4-mismatch,
title = {Troubleshooting PRI circuits that are down or dropping calls: source note pri-circuit-troubleshooting-wanpipe-crc4-mismatch},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/pri-circuit-troubleshooting-wanpipe-crc4-mismatch},
note = {Source note pri-circuit-troubleshooting-wanpipe-crc4-mismatch, checked 2026-10-02}
}