Polycom EF2241 - Manual (Page 20)

I
NTEGRATING THE
EF2241 I
NTO
Y
OUR
S
YSTEM
V ORTEX EF2241 Reference Manual 18 Technical Support: 800.932.2774
for their echo canceller, or they can use their own internal references. The references
may include a mix of any input, with crosspoint gains, including W, X, Y, and Z bus-
ses. Set the EF Bus Reference in the System Menu of the LCD Menu (See “EF Bus
Reference” on page 28).
Setting up the
Bus Reference
If all far end audio and program audio sources are on the same
Vortex device,
1. Assign far end audio and program audio sources to Reference 1 on the originat-
ing device.
2. On the EF Bus page in Conference Composer for the originating device, set the
Exported Signals to R EFERENCE 1. Only one device can put an echo canceller
reference on the EF Bus as the Bus Reference.
3. On all linked devices, set the echo canceller reference to B US .
For example, a system uses 1 EF2241, 1 EF2280, and 1 Polycom VS4000 video
codec. The Reference 1 is set up on EF2280 with ID 0. The Matrix for this EF2280
in Conference Composer is shown in Figure 10 and the EF Bus page in Figure 11.
Conference Composer will not allow more than one device assign their echo canceller
reference as the Bus Reference. Notice that the phone audio and VS4000 inputs are
both assigned to Reference 1 on the originating EF2280. The Matrix for any linked
devices is shown in Figure 12.
Figure 10. Matrix page of origin EF2280 (ID 00) Figure 11. EF Bus page of origin EF2280 (ID 00)