Throughput Limitations; Table 3-4: Bandwidth Limitations - PictureTel Concorde 4500 Servicing Manual

NETWORK INTERFACES
Throughput
Limitations
F Y I
3-26
The Concorde¥4500 functions as a multiplexer by using some of the
channel transmission bandwidth to carry the control port
information from one videoconferencing system to another. When
data is being transmitted, less bandwidth is available for video and
audio transmission. For this reason, ßow control should be used
whenever possible.
Since the Concorde¥4500 operates at channel bandwidths of 56 to
768 kbps, there are limitations on the aggregate data port
bandwidth.
Table 3-4 lists the recommended bandwidth limitations for the
channel and the control ports.

Table 3-4: Bandwidth Limitations

Network
Interface
RS-232
RS-449
V.25 bis
V.35
X.21
If you are using the H.320 protocol, the data rate must be in
F.Y.I.
multiples of 56 or 64 kbps.
Channel
(Not applicable)
1.2 - 768 kbps
1.2 - 64 kbps (dialed)
1.2 - 768 kbps
1.2 - 768 kbps (nondialed)
1.2 - 768 (enhanced dialed)
1.2 - 64 kbps (dialed)
Control Port
1.2 - 9.6 async (A)
0.3 - 38.4 (B)
(Not applicable)
(Not applicable)
(Not applicable)
(Not applicable)