Source note · PRI and TDM gateway interworking
On ISR 4000 Series routers the NIM multiflex trunk (T1/E1 voice) modules use only PVDM4 DSPs; PVDM2 and PVDM3 are not supported on the platform.
Checked 2026-09-24
PVDM2 and PVDM3 DSP modules are NOT supported on the ISR 4000 series platforms.
- Vendor
- Cisco
- Product
- ISR 4000 Series
- Subsystem
- DSP resources
- Deployment
- on-premises
- Region
- not restricted
- Release range
- ISR 4000 Series
- Checked
- 2026-09-24
Sources
- Configure Integrated Services Routers 4000 Series Digital Voice — Cisco Systems · tier 2 current vendor documentation · DSP / PVDM4 section
Cite this note
APA
WarmTransfer. (2026, September 24). PRI and TDM gateway interworking: source note legacy-pri-tdm-isr4k-pvdm4-only. WarmTransfer. https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-isr4k-pvdm4-only
BibTeX
@misc{warmtransfer-claim-legacy-pri-tdm-isr4k-pvdm4-only,
title = {PRI and TDM gateway interworking: source note legacy-pri-tdm-isr4k-pvdm4-only},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/legacy-pri-tdm-isr4k-pvdm4-only},
note = {Source note legacy-pri-tdm-isr4k-pvdm4-only, checked 2026-09-24}
}