Workaround Use the CLI to configure additional lines. Conditions This symptom is observed on a Cisco router that is "fresh out of the box" and affects the following routers: Cisco series Cisco series Cisco series Cisco series Cisco series Cisco series Cisco series.
Conditions When a sharedline member calls the sharedline DN phone number, the other sharedline member which also overlay DNs on the same line will get port hung in various state. Workaround Reload. Symptom After the call transfer on alert, audio is not heard on ip phone. Further Problem Description: During the call transfer, service provider network send slightly different media capabilities on the OK with SDP; capabilities are agreed from CME; but this new capabilities seem to make the issue;.
Symptom Malformed SSL packets may cause a router to leak multiple memory blocks. Conditions This symptom is observed on a Cisco router that has the ip http secure server command enabled. Workaround Disable the ip http secure server command. Symptom The U. By encoding attacks using a full-width or half-width unicode character set, an attacker can exploit this vulnerability to evade detection by an Intrusion Prevention System IPS or firewall.
This may allow the attacker to covertly scan and attack systems normally protected by an IPS or firewall.
Workaround This is an enhancement. Symptom Incoming call on a SIP trunk with G as preferred codec sets up but there is no ringback and dtmf is not working. Workaround Do not use voice-call codec. Conditions Router running CME 4. Symptom Caller ID is received with extra characters. Conditions Whatever name is sent by the source will be received by the destination. Symptom When a c router is loaded with the centservices-mz. T4 image, the router hangs during reload.
Conditions The problem occurs when a c router is loaded with centservices-mz. Symptom When a reverse SSH session is established with valid authentication credentials, anyone can obtain unprivileged Telnet access to a system without being authenticated.
This situation affects only reverse SSH sessions when a connection is made with the ssh -l userid : number ip-address command. Workaround Configure reverse SSH by entering the ip ssh port portnum rotary group command. Symptom After a call is transferred on alert, audio is not heard on IP phones. Further Problem Description: During the call transfer, the service provider network sends slightly different media capabilities on the OK with SDP; these capabilities are agreed upon from CME; but this new capabilities seems to cause this problem.
Symptom The W button is not lit on when the watched phone goes off hook. Conditions This problem only occurs after the CME reboots and the watched phone has speed-dial button configured. Workaround Reset the watched phone.
Restart the watched phone. Remove the speed-dial button. A specific Q. Overall performance of the device can deteriorate to some extent. Workaround The only way to rectify this situation is to reboot the device. Further Problem Description Upgrading the software is suggested. Symptom The cbs did not support qnx. Conditions The cbs was modified to support qnx by the addition of qnx object contexts.
Workaround In order to use qnx with the cbs, modify the makefile to specify qnx. Symptom Cflow instrumentation requires definitions of constructors. Conditions This patching happens only when the cflow build is done using dpe-cli tool. Further Problem Description Extra time is spend by the dpe-cli tool to checkout-patch and again undo-checkout while exiting.
Also since this checkout-patches happens during every build, modified files will be compiled and linked every time. This extra processing can be reduced by checking-in the changes to the branches. Observed in Phones on CME2 can subscribe and show up in show mwi relay clients command however no notify is sent in response to messaging from Unity.
The GW main will core dump:. Conditions This is a performance tes. A vulnerability has been discovered in a third party cryptographic library which is used by a number of Cisco products. Due to the nature of the vulnerability it may be possible, in some cases, to trigger this vulnerability without a valid certificate or valid application-layer credentials such as a valid username or password.
Successful repeated exploitation of any of these vulnerabilities may lead to a sustained Denial-of-Service DoS ; however, vulnerabilities are not known to compromise either the confidentiality or integrity of the data or the device.
These vulnerabilities are not believed to allow an attacker will not be able to decrypt any previously encrypted information. Cisco has made free software available to address this vulnerability for affected customers.
There are no workarounds available to mitigate the effects of the vulnerability. Note Another related advisory is posted together with this Advisory. It also describes vulnerabilities related to cryptography that affect Cisco IOS. Workaround Disable "authenticate register" under "voice register global". Further Problem Description: In registrar Functionality, CME challenges an inbound Register request with response If "authenticate register" is configured under "voice register global".
GW Stack is not processing this Request and is dropping it. Devices running Cisco IOS versions This issue is triggered by a logic error when processing extended communities on the PE device. Workarounds that mitigate these vulnerabilities are available.
Please consult this link for more information:. Workaround Unless removing the dialplan-pattern, no work around present. Symptom The contact header ip address is incorrect in the message sent by sip srst in redirect mode.
As the result basic call fails in this mode. B2b mode is working okay. Workaround Use b2b mode. Conditions When session-target is configured but outbound-proxy is not configured. Workaround None. Symptom A router may crash with CPU vector Conditions IOS running qos and cce. Workaround none. Symptom When onhook dialing or speed dial is performed from CME to an analog port where dialtone is slightly delayed some digits are dropped.
Conditions This is not seen when the digits are delayed, or when the user waits to hear dialtone then dials. Workaround Dial digit by digit. Conditions In the command dsl operating-mode auto tone low , the " dsl operating-mode auto " is used to enable all the supported modes on a DSL line and the " tone low " is used to disable DT-UR2 so that the DSL line can use the carrier tones 29 through With this,.
Workaround Avoid using " dsl operating-mode auto " command. Symptom Memory leak occurred in transfer scenarios. Workaround There are no workarounds.
Symptom The security image does not have presence feature. Symptom IOS image is not reading the mac address for radio interface. Workaround The problem is not seen if the dot11 interface is in up state.
Symptom For an inbound call across a SIP Trunk, IOS might match an dynamically configured dial-peer instead of the user-defined dial-peer configured with "incoming called-number". Workaround Use IOS Conditions No Specific conditions. Conditions No specific condition.
Workaround No workaround for imaLinkIntervalTable. Reload the router. Then save the config. Conditions No specific conditions. The failure always happens when a SNMP get is done.
Symptom MWI lights on does not glow. Workaround No apparent workaround, except that the problem is intermittent. Router has been reloaded. Sometimes this does not seem to work. Further Problem Description: After the router has been reloaded we see an incomplete arp entry.
Removing and adding VLAN data fixes this issue for a while. Symptom Consult transfer failed when XTO has call-forward busy. Symptom Cisco devices running an affected version of Internetwork Operating System IOS which supports Session Initiation Protocol SIP are affected by a vulnerability that may lead to a reload of the device when receiving a specific series of packets destined to port There are no known instances of intentional exploitation of this issue.
However, Cisco has observed data streams that appear to be unintentionally triggering the vulnerability. Workaround Workarounds exist to mitigate the effects of this problem on devices which do not require SIP. This occurs typically in the following inter-autonomous system scenario:. Workaround Use a configuration such as the following to remove extended communities from the CE router:. Symptom On High CPU may be seen as well. Workaround No known workaround at this time. Conditions Client-initiated xconnect L2TPv2 sessions.
Workaround The problem was not observed in Symptom Starting in calendar year , daylight savings summer-time rules may cause Cisco IOS to generate timestamps such as in syslog messages that are off by one hour. Conditions The Cisco IOS configuration command: clock summer-time zone recurring uses United States standards for daylight savings time rules by default.
The Energy Policy Act of H. Workaround A workaround is possible by using the clock summer-time configuration command to manually configure the proper start date and end date for daylight savings time. Conditions Happens when signal loopstart live-feed is configured under voice-port. Symptom INFO request messages is generated properly on hookflash.
Conditions This feature is broken in Workaround Currently there is no workaround. Symptom Malformed SSH version 2 packets may cause a memory leak, causing the platform to operate under a degraded condition.
Get a call from Sales. Contact Sales via Email. Common Features Security, voice and other telephony services at your choice of performance speeds Support for encryption, protection against hackers, data security, and PCI Payment Card Industry compliance Software upgrades to add new features and functions Optional support for Cisco Unified Communications Manager Express for call processing Increased reliability in case of power interruption Analog and digital phone and fax support Series Model.
Number of Phones. Data Rates with Full Services. Key Benefits. Type of Connection. Number of VPN Users. Voice, data, and security in a 1RU form-factor. Increased flexibility and performance. Higher densities of analog interfaces and performance. If you're ready to learn more, here's how to get started Find a Partner. Top questions to ask your partner.
Fast and Easy Online Certain Cisco products and services for SMBs are available through online partners and can be purchased using a credit card. This should say Americas. This does not affect functionality, all of the correct channels are present. This is just the labeling and does not affect functionality.
Conditions This is seen with the B models of the wireless routers running This issue does not affect functionality. Conditions CME running On the with IOS This can occur if there is an ISDN Facility message received after the call connects that does not contain display name information; for example an inbound facility message for Advice of Charge AOC may trigger this problem.
These messages can be seen on the gateway through the use of debug isdn q Make sure as a minimum to disable console logging on the IOS device before enabling any debug.
This issue does not have an impact to the operation or performance of the gateway nor phone. Workaround Contact the ISDN service provider to determine if the facility messages causing this problem can be disabled.
Symptom Modem connection is still active on exit. Conditions After "exit" from modem session. Symptom dtmf stop working if using connection plar opx immediate on fxo port. Conditions Cu is running XW on uc Workaround Don't use "immediate" option for the "connection plar opx". Symptom System crashes when there are clients trying to associate with AP. Conditions When AAA authentication fails with mis-configuration in the system or the wireless client's password is given wrong to try to associate.
Workaround Make sure the AAA configuration is setup correctly and the client password is configured correctly. Conditions Phone call has to be from remote phone. Symptom Call is disconnected when another ephone is reset or unregisters. Conditions The call on the ephone-dn shared by other phone as non monitor button is disconnected if it is reset or unregisters from the CCME. Symptom After a reboot of the router, or sometimes during normal operation, an IPsec tunnel fails to initiate.
Conditions The router is running Workaround A short term workaround consists of removing the access-list used in the crypto map, and then adding it again. This will bring up the tunnel as soon as there is an interesting traffic, but the problem may occur again later.
Remove the crypto map name local-address interface statement, if possible. Downgrade to a release earlier then Instead it sends a BYE and the call gets disconnected. Workaround To work around this problem, reload the device manually after restoring the configuration file.
This vulnerability affects several Cisco products that have support for wired or wireless EAP implementations. Disable MOH from flash that implies tone on hold or beep on hold.
Debug ephone detail will show the following error:. Workaround Reboot the phone. Symptom DTMF levels are 0. Conditions This causes under normal conditions. Workaround Setting the cptone on the voice port to Singapore cures the problem. When this problem occurs, the tone remote control functionality does not work and voice becomes distorted due to the codec mismatch. Conditions A SIP call consistently uses the incorrect codec type from the "voice class codec" configuration.
It should use the value that is configured for "codec preference 1," instead it uses the value that is configured for the "codec preference 2" setting.
This issue occurs when the following configuration is used:. Conditions The problem can be seen for every call. Symptom SCCP messages are delayed by a few seconds for secure calls, this could effect secure dspfarm secure analog endpoints. Conditions Using secure dspfarm or analog endpoints.
Workaround Resetting VC resolve issue. Symptom Router might crash when Extended ACL is applied with mixed of tcp permit statements with host and networks and this acl is applied in the class-map. Workaround Configure permitted host statements successively and do the same for permitted networks. Symptom A Cisco router may crash due to a bus error. The crash can occur if an access-list linked to a service-policy is removed, or if a service-policy is removed on an interface.
Symptom Directory numbers that are configured in local directory of CME are not being shown in received calls directory. The number and name shows while call in ringing state but is not showing during connected state. Conditions This is seen in Inbound call. Symptom Cisco IP Phone placed on hold hears fast busy instead of tone-on-hold. Workaround This behavior was introduced in If the call is not answered, the caller is placed in the queue and hears an announcement with "all agents busy please hold " and so on.
When the script hunts again after a timeout and this time, the call is answered, it drops the call completely. All phones in the hunt group will see a display of 1 call in queue for a few seconds before clearing.
Conditions Call drops only after the 1st round of hunting. If the call is answered in the initial hunting, the call connects. Once the caller is in the queue and hears MOH, if the agent hunt member answers the call after that the call will drop. Symptom The Cisco Embedded Event Manager may hang and tie up virtual terminal vty lines if the devices host name is longer than 20 characters. Conditions The device has a hostname configured that is longer than 20 characters. Workaround Use a hostname less than 20 characters.
These vulnerabilities pertain to the following protocols or features:. Cisco has made free software available to address these vulnerabilities for affected customers. Fixed Cisco IOS software listed in the Software Versions and Fixes section contains fixes for all vulnerabilities mentioned in this advisory.
There are no workarounds available to mitigate the effects of any of the vulnerabilities apart from disabling the protocol or feature itself.
Conditions This happens under any normal conditions. If the phones are configured as SCCP endpoints, the phones will not register. Workaround This issue has been resolved. The solution is available in the release of CME 4. Conditions This symptom is observed on a Cisco router that is "fresh out of the box" and affects the following routers:. Workaround For extensive information and a workaround, see the following Field Notice:. Overall performance of the device can deteriorate to some extent.
Solution The only way to rectify this situation is to reboot the device. Cisco recommends upgrading to a fixed software release. Symptom IP phone trying to create an ad-hoc conference is dropped when pressing "Conf" softkey the second time. Conditions Must be using hardware conferencing in CME 4. The IP phone must receive a call first on on overlaid button.
This initial call must come in on any DN besides the first DN configured in the "button" command in ephone configuration. A caller call a person "A". Person "A" answer the call. Person "A" is monitored by the person "B". The person "B" see on his phone that the person "A" has received a call.
Also person "B" calls person "A" using the monitor button. Person "A" answers the call, putting the first caller on hold. Person "A" uses the conference softkey "Confirm". The message "Select Line" appears without any effect. Devices running Cisco IOS versions This issue is triggered by a logic error when processing extended communities on the PE device.
Workarounds that mitigate this vulnerability are available. Conditions If another call is dropped during trunk dialing, the DN for this terminated call would move to seized state. To work around the one-way audio issue, the call needs to be transferred out and then transferred back. This workaround is not acceptable. Symptom Malformed SSL packets may cause a router to leak multiple memory blocks. Conditions This symptom is observed on a Cisco router that has the ip http secure server command enabled.
Workaround Disable the ip http secure server command. Symptom When a user configures the no telephony-service command, router crashes at running configuration generation. Conditions This symptom is highly unreproducible, but there is a potential race condition between the running configuration generation and the no telephony-service command.
Symptom Non phones will not register securely to CME. A null value in this field will allow the phones to register securely. Workaround Remove the processNodeName parameter in the capf server of the phone's cnf file. Symptom No audio heard on Caller IP phone. Workaround Yes Fallback image available. Symptom In case the platform supported number of BSSIDs is 8 then configuring any ssid which comes in the 9th to 16th order in "sh run" as "guest-mode" results in a software crash.
Conditions Voice calls should invoke a transcoder in order to see this crash. Workaround Disable "authenticate register" under "voice register global". If "authenticate register" is configured under "voice register global".
GW Stack is not processing this Request and is dropping it. Conditions CME could crash if 1 call monitoring is turned AND 2 an incoming call gets routed to any application scripts other than the Default Session. Workaround The work around is to manually disable callmon before running any non-default applications.
Symptom Change CME product version from 4. Conditions This problem happens when this call requires transcoding on the IPIPGW and media transcoder high-density is configured for use. Workaround The workaround is not to use media transcoder high-density on the dial-peers which would handle such described interconnected calls. Conditions The crash would only occur in very rare condition. Indeed the problem is difficult to reproduce. This could happen when an sccp endpoint attempts a consult transfer.
Use this release note with the documents and websites in this release note and the documents listed in the following sections:. The following documents are specific to Release Hardware installation guides, configuration and command reference guides, and additional documents specific to the Cisco series routers are at. Each module in the Cisco IOS documentation set consists of one or more configuration guides and one or more corresponding command references. Chapters in a configuration guide describe protocols, configuration tasks, and Cisco IOS software functionality, and contain comprehensive configuration examples.
Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference.
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