Avaya Communication Manager Administrator's Manual page 483

Viewing announcement measurements
You can view a report of announcement measurements, including how many times an
announcement was queued to play, how many callers dropped while in queue, and how many
times all announcement ports were busy during the report period.
For more information about this report, see Reports for Avaya Communication Manager,
555-233-505, on your documentation CD.
Announcement capacities and load balancing
Understanding how Communication Manager handles annoucements helps with questions of
capacity the load-balancing of announcement traffic. The Avaya S8700 Series and S8300
media servers support up to 3,000 announcements across the Communication Manager
system. Each of as many as 10 integrated announcement boards (and each G700 virtual VAL
source) is limited to 256 announcements. All Avaya G700 Media Gateways in the system can
be assigned as VAL sources, for a maximum of 250 G700 VAL sources in a large S8700 Series
media server configuration also with up to 10 TN2501 VAL boards, providing an ultimate
capacity of 260 sources for the Avaya S8700 Series servers.
Wach TN2501 has 31 playback ports (with 60 minutes of storage capacity) and each G700 VAL
source has 15 playback ports (with 20 minutes storage capacity). Initially each caller that is to
hear a non-barge-in announcement on that source is connected to an available port until each
port has one caller connected. Initially 31 callers can be hearing an announcement from a single
TN2501 board (15 with a G700 VAL source). The same announcement can be playing from
multiple ports, each starting at a different time. Once all ports are busy playing announcements,
subsequent callers that are to hear an announcement residing on that board/source are queued
for that source. Communication Manager queue size over all integrated announcement
sources is 4,000 callers (S8700 Series/S8300 media servers). When a port becomes available,
all callers (up to 1,000) waiting in the queue for a specific announcement on that source are
connected to the available port to hear the announcement play from the beginning on a first-in,
first-out basis. At any given time you can have as many as 1,000 callers hearing the same
announcement on a given port of a board/source, yielding a (theoretical, system-wide) capacity
of 31,000 callers connected to a VAL board (or 15,000 callers connected to a G700 Media
Gateway virtual VAL source). Factor in barge-in announcements which continuously play from a
single port (that can have as many as 1,000 callers connected at the same), and this provides a
very, very large capacity for playing announcements. The measurements announcements
commands can be used to monitor the system and help determine burst conditions, allowing for
better load balancing of the traffic.
Troubleshooting VAL Announcements
Issue 1 June 2005 483