T5
Voice QoS
Marks, queues, and the delay budget
Sources and go deeper
Opened 2026-10. A row marked confirm has no link, because that page was not verified.
- RFC. RFC 3246, Expedited Forwarding last checked 2026-10
- RFC. RFC 4594, DiffServ service classes last checked 2026-10
- ITU. ITU-T G.114, one-way transmission time last checked 2026-10
- ITU. ITU-T G.711, pulse code modulation of voice last checked 2026-10
- Cisco. Cisco Collaboration Preferred Architectures last checked 2026-10
- Cisco. System Configuration Guide for CUCM, Release 15 last checked 2026-10
- Community. Cisco Community, Collaboration knowledge base last checked 2026-10
- Wikipedia. Differentiated services (Wikipedia) last checked 2026-10
- Wikipedia. Quality of service (Wikipedia) last checked 2026-10
- Cisco. Enterprise QoS SRND book. confirm. The Enterprise QoS SRND path returned HTTP 404. last checked 2026-10
- Cisco. Preferred Architecture for Cisco Collaboration 15, design overview (PDF) last checked 2026-10
- Cisco. Cisco Unified Communications Manager product support last checked 2026-10
DSCP and the trust boundary
Voice RTP is commonly marked EF, DSCP 46.
LLQ and the delay budget
Priority queue bandwidth is a limiter for the EF class.
Locations and call admission control
A CUCM location names a bandwidth budget between sites.
Sources and go deeper
Opened 2026-10. A row marked confirm has no link, because that page was not verified.
- RFC. RFC 3246, Expedited Forwarding last checked 2026-10
- RFC. RFC 4594, DiffServ service classes last checked 2026-10
- ITU. ITU-T G.114, one-way transmission time last checked 2026-10
- ITU. ITU-T G.711, pulse code modulation of voice last checked 2026-10
- Cisco. Cisco Collaboration Preferred Architectures last checked 2026-10
- Cisco. System Configuration Guide for CUCM, Release 15 last checked 2026-10
- Community. Cisco Community, Collaboration knowledge base last checked 2026-10
- Wikipedia. Differentiated services (Wikipedia) last checked 2026-10
- Wikipedia. Quality of service (Wikipedia) last checked 2026-10
- Cisco. Enterprise QoS SRND book. confirm. The Enterprise QoS SRND path returned HTTP 404. last checked 2026-10
- Cisco. Preferred Architecture for Cisco Collaboration 15, design overview (PDF) last checked 2026-10
- Cisco. Cisco Unified Communications Manager product support last checked 2026-10