ACA Session Border Controllers & Cloud Connectivity 2 — Questions and Answers
Question 1: AudioCodes 'Survivability' feature on a branch SBC ensures:
- Local calls continue to function during WAN outage by the SBC registering endpoints and routing calls locally (Correct answer)
- Remote firmware upgrades proceed during WAN outages
- SRTP keys are refreshed automatically on WAN recovery
- CDR records are buffered and sent to OVOC when WAN restores
Correct answer: Local calls continue to function during WAN outage by the SBC registering endpoints and routing calls locally
Survivability mode activates when the SBC loses connectivity to the central call control system, allowing it to register local endpoints and route intra-branch calls independently.
Question 2: Which AudioCodes SBC feature translates between different SIP variants and fixes interoperability issues between heterogeneous vendors?
- SIP Normalization (via Message Manipulation Rules and SIP Profile) (Correct answer)
- Topology Hiding
- Media Anchoring
- SRTP enforcement
Correct answer: SIP Normalization (via Message Manipulation Rules and SIP Profile)
SIP Normalization uses message manipulation rules and SIP profiles to modify headers, add/remove parameters, and adjust behavior to ensure interoperability between SIP implementations from different vendors.
Question 3: In AudioCodes Teams Direct Routing, which FQDN pattern does Microsoft require the SBC certificate's Subject Alternative Name (SAN) to match?
- The FQDN used in the SBC's configuration on the Microsoft Teams Admin Center (must match exactly) (Correct answer)
- Any wildcard certificate (*.company.com)
- The SBC's IP address as a SAN
- sbc.microsoft.com
Correct answer: The FQDN used in the SBC's configuration on the Microsoft Teams Admin Center (must match exactly)
Microsoft requires the SBC certificate's SAN to exactly match the FQDN configured in Teams Admin Center for Direct Routing, ensuring the TLS certificate validates the SBC identity.
Question 4: What is the role of 'Local Media Optimization (LMO)' in AudioCodes Teams Direct Routing deployments?
- Allows media to flow directly between Teams clients and the PSTN SBC without traversing the Microsoft media processors, reducing latency (Correct answer)
- Forces all media through Microsoft data centers
- Enables offline media caching on the SBC
- Provides media recording without SBC involvement
Correct answer: Allows media to flow directly between Teams clients and the PSTN SBC without traversing the Microsoft media processors, reducing latency
LMO is a Microsoft Teams Direct Routing feature that allows RTP media to bypass Microsoft media processors and flow directly between the Teams client and the SBC for lower latency in optimized deployments.
Question 5: AudioCodes 'ARM (AudioCodes Routing Manager)' is used in multi-site deployments to:
- Provide centralized SIP routing policy management across multiple SBCs from a single management point (Correct answer)
- Replace individual SBC configuration entirely
- Generate automatic TLS certificates for all SBCs
- Monitor RTP quality across all sites
Correct answer: Provide centralized SIP routing policy management across multiple SBCs from a single management point
ARM centralizes call routing rules and policies for multiple AudioCodes SBCs, allowing administrators to manage routing from a single interface rather than configuring each SBC independently.
Question 6: Which AudioCodes SBC licensing model is based on the number of simultaneous sessions (calls)?
- Session-based licensing (licensed by concurrent session capacity) (Correct answer)
- Per-user licensing
- Per-trunk licensing
- Feature-based perpetual licensing only
Correct answer: Session-based licensing (licensed by concurrent session capacity)
AudioCodes SBC capacity is licensed by the number of concurrent sessions (simultaneous calls), allowing organizations to scale capacity by purchasing additional session licenses.
ACA Session Border Controllers & Cloud Connectivity 2
AudioCodes 'Survivability' feature on a branch SBC ensures: