AT&T IPC-1600 User Manual page 87

Performance Characteristics
The output capacity of the IPC-1600 is determined by the number of lines
(ports) simultaneously operating at 98% occupancy with no flow control as
follows.
Operating beyond these input limits with no flow control will result in
loss of characters. Operating beyond these input limits WITH flow control
will result in decreased line occupancy and no data loss. No data loss is
associated with output regardless of flow control; however, reduced occupancy
will result if these limits are exceeded.
6-4 IPC-1600 USER'S GUIDE
Raw Mode:
14 ports at 19,200 bps
Cooked Mode:
16 ports at 9,600 bps
14 ports at 19,200 bps
16 ports at 4,800 bps
16 ports at 9,600 bps
7 ports at 38,400 bps
16 ports at 4,800 bps
7 ports at 38,400 bps