We are implementing a voice over IP calling system.
As we did not get an digital E1 from Telcom company, We use a channel
bank to convert the analog lines and make it to an E1.
This E1 is connected to the CISCO AS5350 E1 port.
The IVR is configured through a Radius Server. The
problem is explained as below.
After making a call through the lines and Cisco, the
line is not getting disconnected immediately once we
hang up the phone. it stays connected about 70 to
80 seconds after hanging up the phone from our end.
This is creating very problem for billing our
customers.
The channel bank details:
The channel bank has got a polarity reversal
configuration for the disconnect supervision. we had
an out going polarity reversal on our lines from
Telecom compnay. We tested with this and it was not working. As
per the Channel Bank Manufacturer, we need to have an
incoming polarity reversal on the lines.
We are trying for an incoming polarity reversal on the
lines.
The call is not getting terminated once the line is
hang-up. The CISCO thinks as if the line is connected.
Once we make a just a ring on the channel bank, the
channel bank disconnects after fifteen seconds. When
we make a call through the system it takes, around 70-
80 seconds to disconnect after we hang up our side.
When we monitor the line after a call hang-up, we hear
the busy tones on the lines from Telecom comapny and at the same
time the connection to the line.
The CISCO has got 2 E1 Ports. Configured according to
the channel bank manufacturer.
Hope U have got our problem, the line is not
disconnecting. Either the CISCO is not able to read it
or
the channel bank is not able to supply it. We request
you to kindly study the problem and suggest us any
configuration changes required. We welcome your
suggestions
Technical Details
1. We have a cisco AS5350 and valiant communication channel bank.
Plz try to advice me on this, and help meout of the situtaiton.
reagards
Atfi Duarize
Network Engineer
TNG-ME
