Polycom V500 Release Note page 23

Release Notes
V500 and VSX systems, version 8.5
Feature Limitation
Interoperability Pressing the CALL button on the SoundStation VTX 1000
SoundStation VTX conference phone when the VSX system is idle causes the
1000 VSX system to play a brief announcement tone and display
full-screen local video. Continue to dial the call normally
using the VTX 1000 phone's keypad.
When a SoundStation VTX 1000 connected to a VSX system
calls another SoundStation VTX 1000 connected to a VSX
system, the analog icon is displayed in the near screen along
with the VTX 1000 icon and encryption status.
On a VSX system connected to a SoundStation VTX 1000,
when you use the VSX system to place a VTX 1000 call to
another phone, the SoundStation VTX 1000 (POTS) call is
not shown on the Recent Calls list.
When you place a H.323 call from a VSX system connected
to a SoundStation VTX 1000 and then use the SoundStation
VTX 1000 to add an audio call, muting the VSX system's
microphones blocks the audio endpoint from hearing audio.
When a SoundStation VTX 1000 attempts to add video when
connected to a V.35 system and ISDN call speed is set to
384 kbps, the call speed is ignored and the SoundStation
VTX 1000 dials 128 kbps.
On a VSX 6000 with a SoundStation VTX 1000 attached, the
Call Type choice is disabled when you use the Web Director
to place a call.
If you place a call from a VSX 8000 with a SoundStation
VTX 1000 running firmware revision 1.4 attached to another
video endpoint, and then use the SoundStation VTX 1000 to
call another SoundStation VTX 1000, the audio from the
SoundStation VTX 1000 has much more bass and slightly
less volume than the audio received from the other video
endpoint. This is resolved by installing VTX 1000 firmware
revision 1.5.
When the far site hangs up a call to a SoundStation
VTX 1000, you also need to hang up the SoundStation
VTX 1000, just like a regular phone.
Turning off the Console Mics from the SoundStation
VTX 1000 menu has no effect when the phone is used with a
VSX system. To disable the phone microphones in this case,
disable the Enable Polycom Microphones option on the
VSX system.
For SoundStation VTX 1000 calls, call statistics are not
displayed on the VSX system.
Interoperability Some ISDN switches will add the area code to numbers
Switches when calling from the Recent Calls list (especially if you dial
a number that had dialed into the system previously). In such
cases, the call will not connect. The system will have to be
set to dial local numbers without an area code.
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