Cisco Cisco IOS Software Release 12.3(4)T
Restrictions for Private Line Automatic Ringdown for Trading Turrets
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Cisco IOS Release 12.3(4)T
Restrictions for Private Line Automatic Ringdown for Trading
Turrets
Turrets
The following restrictions apply to the Private Line Automatic Ringdown for Trading Turrets:
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Minimum Cisco IOS Release
Before you can run the Private Line Automatic Ringdown for Trading Turrets feature, you must install
an IP Plus image (minimum) of Cisco IOS Release 12.2(15)ZJ or a later release.
an IP Plus image (minimum) of Cisco IOS Release 12.2(15)ZJ or a later release.
Configuration Information
This feature is supported only for FXS loop-start ports and digital ear & mouth (E&M) immediate-start
ports. When a voice port is configured with an incorrect destination number that may or may not be a
valid number, the call may not perform as expected. There is no cross-checking for turret PLAR from
the origination voice port, but there is a check on the terminating voice port to prevent accepting a call
from a calling party that is not preconfigured.
ports. When a voice port is configured with an incorrect destination number that may or may not be a
valid number, the call may not perform as expected. There is no cross-checking for turret PLAR from
the origination voice port, but there is a check on the terminating voice port to prevent accepting a call
from a calling party that is not preconfigured.
Configuration of Both Endpoints
To work properly, this feature must be configured at both endpoints in the connection (either FXS
loopstart port or digital E&M immediate-start port).
loopstart port or digital E&M immediate-start port).
Information About Private Line Automatic Ringdown for Trading
Turrets
Turrets
To use this feature, you should understand the following concepts:
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Private-Line Automatic Ringdown
Private-line automatic ringdown (PLAR) circuits have statically configured endpoints and do not require
dialing to connect calls. The connection plar command provides a mechanism to create a switched
Voice over IP (VoIP) call without digit dialing. PLAR connections are useful where a telephone (or DS0)
goes off-hook and a remote telephone rings (or remote DS0 goes off-hook) without digits being dialed.
This feature is useful for:
dialing to connect calls. The connection plar command provides a mechanism to create a switched
Voice over IP (VoIP) call without digit dialing. PLAR connections are useful where a telephone (or DS0)
goes off-hook and a remote telephone rings (or remote DS0 goes off-hook) without digits being dialed.
This feature is useful for: