Cisco Cisco IOS Software Release 12.4(23)

Phone b calls phone c;

Phone b calls phone d;

Phone d picks up and hears a hissing noise.

Workaround: There is no workaround. 

Cisco IOS Release 12.4(3d) is a rebuild release for Cisco IOS Release 12.4(3). The caveats in this 
section are resolved in Cisco IOS Release 12.4(3d) but may be open in previous Cisco IOS releases. 

CSCej18051

Symptoms: Terminal window PPP clients may fail with Cisco Access servers.

Conditions: This symptom has been observed on Cisco AS5400 gateways and Cisco AS5800 
servers.

Workaround: There is no workaround. 

CSCek27271

Symptoms: The IPSLA test packets returned by the IPSLA responder for the UDP jitter operation 
have ToS value of 0 instead of the value configured for the operation. Because of this, the two IPSLA 
UDP jitter operations between same source and responder routers with just the different ToS 
configurations will report the same round trip time even though the expected values are different.

Conditions: This symptom has been observed on the routers configured with an IP SLA User 
Datagram Protocol (UDP) jitter operation with microseconds precision and has the ToS value 
configured.

Workaround: There is no workaround. 

CSCsb30875

Symptoms: Active eRSC on a Cisco AS5850 gateway could hang after RPR+ failover, if the aaa 
accounting system command is configured.

Conditions: The symptom has been observed under the following conditions:

RPR+ failover occurred.

Console connection window closed & reopened to the newly active eRSC after failover.

Workaround: There are two workarounds.

The eRSC hang will not happen if no attempt is made to close and reopen the console session 
with newly active eRSC after failover.

Remove the aaa accounting system command from the configuration.