AUDIO STREAM INTRODUCTION
• In most cases, "Audio Stream" problems can only be found and solved by means of an exclusion procedure.
• It is paramount that the customer/user knows that audio stream problems are difficult to track down and to solve.
• It's nerve-wracking and it is time consuming.
• Solving audio stream problems often requires the cooperation and active co-testing from the customer/user with the support personnel! The active help of the customer/user is needed in most cases e.g., by executing test connections.
The audio stream problem type covers the following erroneous conditions:
• No voice transmission in one or both directions from the beginning of the connection
• Bad voice quality during the connection
Naming of audio stream problems:
• One-Way/No-Way Connection:
There is no speech transmission in one or both directions from beginning of the connection.
• Glitch Connection:
There is speech transmission, but it is disturbed.
AUDIO STREAM PROBLEM CHARACTERISTICS
Characteristics of audio stream problems:
• One-Way/No-Way Connection:
- Silence in both directions
- Silence from A → B
- Silence from B → A
- Possible reason:
Mostly due to no or blocked RTP data transmission
• Glitch Connection:
-Crackle, clicking → Possible reason: small packet loss, jitter
- Short interruption → Possible reason: bigger packet loss
- Ouw-ing → Possible reason: jitter, transcoding
- Echo → Possible reason: jitter, big delay
AUDIO STREAM PROBLEM ZONES
EXCLUSION OF AUDIO STREAM PROBLEM SOURCES
"CHECK THE BIG PICTURE"
INTERVIEW THE COMPLAINING USER
CHECK THE CALL STATISTICS OF THE CALL
