Nortel Networks CTA 500dm User Manual
48 AT commands
CTA 500
dm On Line Guide
P0873832 Issue 05
The following table shows the values for bearer service selection.
Result Codes
OK Appears when the selected value is supported.
ERROR Appears when the selected value is unrecognized or is not
supported.
supported.
Channel Speed Control
The Channel Speed Control Command
%A4=value
instructs the CTA 500dm to use the speciÞed data rate for outgoing
calls dialed over the B-channels of the TCM port of the CTA 500dm.
The selected rate applies to both channels on the TCM link.
calls dialed over the B-channels of the TCM port of the CTA 500dm.
The selected rate applies to both channels on the TCM link.
The following table shows the values for data rate selection.
Result Codes
OK Appears when the selected value is supported.
ERROR Appears when the selected value is unrecognized or is not
supported.
supported.
Incoming Call Control
Data calls can be answered over any of the ISDN bearer services.
The data rate can be either 56 kbit/s or 64 kbit/s. However, the data
rate over either of the voice bearer services must be set to the same
rate as the receiving end, since this cannot be indicated in call set-up
The data rate can be either 56 kbit/s or 64 kbit/s. However, the data
rate over either of the voice bearer services must be set to the same
rate as the receiving end, since this cannot be indicated in call set-up
Value
Bearer Service
0
data (default)
1
3.1 kHz audio
2
speech
Value
Data rate
0
64 kbit/s
1
56 kbit/s (default)