Cisco 2821 ios 15.1 download






















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Minimum monthly payments are required. Subject to credit approval. See terms. Feedback on luckywolf29 from others who bought this item. Positive feedback. Good product. In response to Martin L. VIP Master. IST - Leo Laohoo. VIP Community Legend. Final release is SE Cisco Employee. Regards, Eduardo. Post Reply. Latest Contents. Conditions The symptom is observed only in the first 36 hours following a reload.

Workaround Do not connect to irc. Conditions This happens when the CLI's parser chain was moved, hence missing them on the platforms.

Need to ensure the parser chain is implemented as platform independent. Symptom Consult transfer with third party sip endpoints results in one way audio when the third party endpoint has delayed response to resume request which includes change in rtp stream parameters i. Conditions sip supplementary services refer is disabled. Symptom IP connectivity fails for the interface following extended pings from FastEthernet interface.

The show interface command will indicate that the output queue is wedged:. No indication at this time that this is specific to these images.

This problem has not yet been seen on an interface in full duplex mode. Symptom Router reloads with a bus error and no tracebacks. The installed IOS version is any Workaround There is no known workaround available.

Subsequent calls through that same channel continue to fail with "resource unavailable" cause value equal to 47 even after DSP resources have been made available to handle the call. The call must first fail with a legitimate DSP allocation error. Any call made through the same channel as the failed call will also fail. DSP allocation failures on gateway can be checked through the use of the exec command show voice dsp group all.

The last line of the show command output includes a counter for "DSP resource allocation failure". This issue can also be seen in some cases upon bootup. When a gateway is reloaded, system resources will come up with a slightly different timing. If, for example, a PRI interface comes up before the DSP resources have fully initialized, there may be a similar failure. Workaround The workarounds are as follows:. When the gateway comes back up, take the voice-port out of shutdown.

An increase of almost 10 percent in CPU utilization is observed with every voice call. Workaround Remove the AIM compression card from the motherboard. Outbound calls to the SIP provider have one-way audio. The internal IP phone can hear the remote party, but the remote party cannot hear the internal IP phone.

Conditions TNP phones with firmware 8. Workaround Wait for about a minute, and the port will automatically recover back to registered. Symptom A call from a night hunt forwarded to BACD dial by an extension to an ephone call forwarding no answer to voicemail goes to the night hunt number and not the last redirected number. The packets will appear as output drops on the ATM interface statistics. Under the PVC level, there are no drops. The ATM interface s need to be bridge-group configured.

The bridge-group is in forwarding mode. Symptom The call-waiting tone will not be generated and the caller ID will not be displayed for the second call to a phone connected to a FXS port.

Configuring either caller-id enable or caller-id enable type 2 on the FXS voice port will trigger this issue. Workaround Configuring caller-id enable type 1 under the voice port will provide call-waiting tone. However, caller-id will not be provided for the second call. This timer dictates how long a T1 CAS, wink-start endpoint must remain offhook before completing a wink.

Failure to expire the timer will cause the c to incorrectly classify a valid wink as invalid, failing outbound calls.

Conditions This can happen when there is a brief period of increased CPU usage while a call is in the process of connecting. In other words, a small spike in CPU usage can cause the time to fail to expire, thereby causing a wink failure. This may or may not help depending on the cause of the CPU spikes. A two way conversation is then established between Phone A xxx and Phone C zzz.

Then the call is disconnected. With 8. Conditions If the calls come in a PRI or FXO interface, and a user on an active call on the octoline puts the call on hold while there is an incoming call, it will automatically answer the incoming call.

Approximately 13 seconds later the second call is dropped. If the user requires to put a call on hold while a new call is coming in, they must wait until the incoming call stops ringing.

Symptom Memory fragmentation, no call accepted, no output for show run. Symptom A gateway may take an exception when receiving an inbound H call when the call is placed via ISDN overlap sending.

Symptom Symptom A video call for a 3G H. Also, in the media sent to the endpoint, the video port is set to 0 as the debug state. Symptom The dsp allocation signaling dspid command under voice-card on platform is not available. Conditions This issue is on platform alone. Symptom After upgrading to The amount of IO MEM allocated upon boot up of the router has not changed with respect to previous versions. This change in memory consumption is expected due to the integration of new features.

Conditions This defect is seen on Symptom Call is terminated after aborting the transfer attempt. Conditions This problem is observed if transfer-digit-collect is not configured or configured as new , the default. Workaround Configure transfer-digit-collect orig. Conditions c platform with HW crypto engine.

Symptom Router continuously reboots. Conditions This symptom is observed when an NME is installed on the router. Workaround Replace or remove the NME Workaround Configure clock source line independent on all 4 DS1s.

If that's not an option, downgrade to any IOS before Symptom The vlan. It has been observed that when the vlan. Customer needs to reconfigure them again after reboot. Further Problem Description : When a customer is running an image that does not store the VTP and VLAN information in the start-up configuration or the normal output of show running-config, the vlan.

The operating VTP information appears in the output of show running-config all which shows non-default and default values , indicating that the router considers the VTP information to be at default values even when there is a VTP domain name configured. Conditions Running show mrcp client session active detail or show mrcp client session active and using MRCP v2.

Workaround Do not run these commands. Conditions The problem is observed when the media server is no longer reachable from the VXML gateway. The socket connection attempt is not successful but the VXML gateway does not release the socket. With each connection attempt the socket is incremented until the max of is reached.

Once the max is reached, the VXML gateway will no longer attempt to open a socket to the media server until a reload occurs. Symptom There is a delay in the propagation of interface link down state. Link failure is detected with a huge delay once the other end of the link gets disconnected. Workaround The default keepalive period is 10 seconds and the periodic function which updates the link state change runs on the order of keepalive time, hence it takes long time to detect the link down state.

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