show modem connect line line-id all interchange circuits
The modem connect line entity has a special attribute group
"interchange circuits", which lets you show a subset of the
status attributes. This "interchange circuits" attribute
group allows you to examine the instantaneous status of the
interchange circuits on the line.
These circuits are known by different names in the various
interface standards. The following list shows how the status
attribute names used in NCL correspond to those used in the
interface standards.
For instance, the data terminal ready attribute is the name used
for the CCITT V.24 circuit 108/2, the EIA-232-D CD circuit, the
RS-499 TR circuit, and so on.
When entering commands, always use the NCL attribute name.
When displayed, each attribute has one of the following values:
asserted The circuit is asserted
not applicable The circuit does not exist on the interface
not asserted The circuit is not asserted
unknown The modem cable is not connected or is invalid
1 – CCITT V.24 Circuits
Modem Connect Line Interchange Circuits
NCL Attribute Name Circuit Description
----------------------------------------------------------------------
carrier detect 109 Data channel received line
signal detector
clear to send 106 Ready for sending
data set ready 107 Data set ready
data terminal ready 108/2 Data terminal ready
local loopback 141 Local loopback
remote loopback 140 Loopback/Maintenance test
request to send 105 Request to send
ring indicator 125 Calling indicator
signalling rate 112 Data signal rate selector(DCE)
indicator
signalling rate 111 Data signal rate selector (DTE)
selector
test mode 142 Test indicator
2 – DIN 66020 Blatt 1 Circuits
Modem Connect Line Interchange Circuits
NCL Attribute Name Circuit Description
----------------------------------------------------------------------
carrier detect M5 -
clear to send M2 -
data set ready M1 -
data terminal ready S1.2 -
local loopback PS3 -
remote loopback PS2 -
request to send S2 -
ring indicator M3 -
signalling rate not -
indicator supported
signalling rate S4 -
selector
test mode PM1 -
3 – EIA-232-D Circuits
Modem Connect Line Interchange Circuits
NCL Attribute Name Circuit Description
----------------------------------------------------------------------
carrier detect CF Received Line Signal Detector
clear to send CB Clear to Send
data set ready CC DCE Ready
data terminal ready CD DTE Ready
local loopback LL Local Loopback
remote loopback RL Remote Loopback
request to send CA Request to Send
ring indicator CE Ring Indicator
signalling rate CI Data Signal Rate Selector (DCE)
indicator
signalling rate CH Data Signal Rate Selector (DTE)
selector
test mode TM Test Mode
4 – RS-232-C Circuits
Modem Connect Line Interchange Circuits
NCL Attribute Name Circuit Description
----------------------------------------------------------------------
carrier detect - Received Line Signal Detector
clear to send - Clear to Send
data set ready - Data Set Ready
data terminal ready - Data Terminal Ready
local loopback - not supported
remote loopback - not supported
request to send - Request to Send
ring indicator - Ring Indicator
signalling rate - Data Signal Rate Selector (DCE)
indicator
signalling rate - Data Signal Rate Selector (DTE)
selector
test mode - not supported
5 – RS-449 Circuits
Modem Connect Line Interchange Circuits
NCL Attribute Name Circuit Description
----------------------------------------------------------------------
carrier detect RR Receiver Ready
clear to send CS Clear to Send
data set ready DM Data Mode
data terminal ready TR Terminal Ready
local loopback LL Local Loopback
remote loopback RL Remote Loopback
request to send RS Request to Send
ring indicator IC Incoming Call
signalling rate SI Signaling Rate Indicator
indicator
signalling rate SR Signaling Rate Selector
selector
test mode TM Test Mode