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Table Of Contents
Release Notes for Cisco CallManager
Release 2.4(5)Recommended Hardware Requirements
Minimum Requirements for the Cisco Access Digital Gateway DT-24+/DE-30+
Determining Your Software Release
Cisco CallManager Release 2.4(5)
Cisco CallManager Release 2.4(4)
DtSilenceFlag Default Setting Changed to 0 (Disabled)
Audio Levels and Echo on Cisco Access Digital Gateway DT-24+/DE-30+
B-Channels and G.723 Calls on Cisco Access Digital Gateway DT-24+/DE-30+
Reset Option for Configuring Cisco IP Phones
Tone on Hold, Transfer, and Call Park
Open Caveats for Cisco CallManager Release 2.4(4)
Open Caveats for Cisco CallManager Release 2.4(3)
Open Caveats for Cisco CallManager Release 2.4(2b)
Open Caveats for Cisco CallManager Release 2.4(1)
Open Caveats for Cisco CallManager Release 2.3(1b) and 2.3(2)
Open Caveats for Cisco CallManager Release 2.2
Obtaining Technical Assistance
Release Notes for Cisco CallManager
Release 2.4(5)
September 29, 2000
These release notes describe Cisco CallManager Release 2.4(5). Use these release notes in conjunction with Installing Cisco CallManager Release 2.4 on the Cisco Media Convergence Server, the Cisco Voice Products documentation located on Cisco Connection Online (CCO), and the Cisco Documentation CD-ROM.
Contents
These release notes discuss the following topics:
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Obtaining Technical Assistance
Introduction
Cisco CallManager is a network business communication system providing high-quality telephony over IP networks. Cisco CallManager enables the conversion of conventional, proprietary circuit-switched PBXs to multi-service, open LAN systems.
System Requirements
This section lists the system requirements for installing Cisco CallManager.
Minimum Hardware Requirements
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Recommended Hardware Requirements
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Software Requirements
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Minimum Requirements for the Cisco Access Digital Gateway DT-24+/DE-30+
A Channel Service Unit (CSU) is required if the Cisco Access Digital Gateway is connected to a telecommunications company or ISDN PRI demarcation point. If the gateway is connected to a PBX, a CSU may be required depending on the cable length. Consult the PBX documentation for maximum length requirements for connections without CSU support.
Determining Your Software Release
To determine the software release and version number of Cisco CallManager currently running on your system, perform these steps:
Step 1
Result: The Welcome screen is displayed.
Step 2
Result: The software release version is displayed. You can click the Details button to learn more information about the software release numbers.
Installation Instructions
This section contains information about installing Cisco CallManager Release 2.4(5) from the Cisco Connection Online (CCO) software download site and upgrading it to a more recent release. For a complete description of Cisco CallManager, see the appropriate online documentation for your release of the software.
NotePerform the following steps to download and install the Cisco CallManager software:
Step 1
Step 2
Step 3
Step 4
Note
New and Changed Information
This section lists the features that are new or have changed for Cisco CallManager, up to and including Release 2.4(5).
Cisco CallManager Release 2.4(5)
Cisco CallManager Release 2.4(5) is a maintenance release. No new features have been added. This release resolves the Cisco WebAttendant client installation problem (CSCdr83330). The Cisco WebAttendant client can now be installed successfully on Windows 95/98 operating systems. Refer to the "Caveats" section for information about open Caveats for this release.
Cisco CallManager Release 2.4(4)
The following change was made to Cisco CallManager Release 2.4(4). Refer to the "Caveats" section for information about open Caveats for this release.
DtSilenceFlag Default Setting Changed to 0 (Disabled)
The DtSilenceFlag setting in the Cisco CallManager scm.ini file controls whether or not silence is sent while a caller waits for the phone to be answered at the other end. When it is set to False (disabled), the audio stream is sent on call proceeding instead of waiting for a connect from the other end. When it is set to True, silence is sent until a connect is received from the phone at the other end. For Cisco CallManager Release 2.4(4), the default setting for DtSilenceFlag has been changed to 0 (disabled).
There is, however, one side effect that occurs when DtSilenceFlag is set to 0 (disabled). When DtSilenceFlag is disabled and you are calling an analog phone, you may hear loopback (echo) of your audio until the phone on the other end is answered.
To eliminate this echo, you can change the default setting of DtSilenceFlag to 1 (enabled).
Caution
Therefore, it is strongly recommended that you schedule a test 911 call with your 911 service provider to verify that this problem does not occur. The test scenario should include the following steps:
1. Schedule a test call with your 911 service provider during off-peak hours.
2. Make sure that the test call will be routed over a Cisco Access Digital Trunk Gateway.
3. Enable the DtSilenceFlag parameter.
4. Make the 911call.
5. If the 911 operator can hear you, the test is passed, and you can leave the DtSilenceFlag setting enabled. If not, disable it immediately.Perform the following steps only if you wish change the default setting of DtSilenceFlag to enable sending of silence:
Step 1
Step 2
Step 3
DtSilenceFlag=0 ; 0 = disable silenceStep 4
DtSilenceFlag=1 ; 0 = disable silenceStep 5
DtSilenceFlag is set to 1, and silence is enabled.
Cisco CallManager Release 2.4
Admission Control
Admission control helps maintain a desired level of voice quality over a network link by limiting the number of calls that can be active on that link at any one time. Using Cisco CallManager Administration, you can specify the total amount of bandwidth allocated for voice communications over each link in your network, thus limiting the number of calls allowed on each link. Admission control applies only to networks with a hub-and-spoke (or star) topology. Admission control does not guarantee a particular level of voice quality.
Audio Levels and Echo on Cisco Access Digital Gateway DT-24+/DE-30+
When using a Cisco Access Digital Gateway DT-24+/DE-30+, callers on the PSTN side of the connection might sometimes hear echo. You can reduce or eliminate this echo by adjusting the audio levels (pad settings) for the gateway.
NotePossible causes of the echo are:
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You should adjust the audio levels on the Cisco Access Digital Gateway DT-24+/DE-30+ only if callers on the PSTN side of a connection are experiencing an echo problem. Cisco recommends that you use a telecom test set on the PRI to verify that the audio levels are indeed out of telco specification, and then add gain or loss accordingly. If you do not have the appropriate test equipment, or if you do not have expertise with such equipment, you can try different pad settings and make test calls until the echo is reduced to an acceptable level on the PSTN caller side.
NoteAdjusting the audio levels on the Cisco Access Digital Gateway DT-24+/DE-30+ requires the following software:
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Default pad settings for the D003G024 load are:
To adjust the audio levels on the Cisco Access Digital Gateway DT-24+/DE-30+ using the DickTracy utility, perform the following steps:
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Where:
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mute
01
-31dB
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-30dB
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-29dB
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..
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.29
-3dB
30
-2dB
31
-1dB
32
0dB
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+1dB
34
+2dB
35
+3dB
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.
..
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.62
+30dB
63
+31dB
New pad settings take effect on the next call made on each B-channel. Calls in progress are not affected by setting changes.
B-Channels and G.723 Calls on Cisco Access Digital Gateway DT-24+/DE-30+
To use all B-channels of the Cisco Access Digital Gateway DT-24+/DE-30+ for G.723 traffic, you must set the MaxNumberOf723Calls parameter in the scm.ini file. The MaxNumberOf723Calls parameter specifies the maximum number of G.723 calls that the gateway can send or receive. Set MaxNumberOf723Calls to 23 for the Cisco Access Digital Gateway DT-24+, or set it to 29 for the Cisco Access Digital Gateway DE-30+.
Cisco Messaging Interface
There are three new Windows Registry entries that you can use to configure the Cisco Messaging Interface. If you want to use them, you must create the Registry entries prior to installing the Cisco Messaging Interface. Upon installation, the Cisco Messaging Interface reads these Registry entries and uses them to configure the way it processes incoming and outgoing messages. If it cannot find these Registry entries, the Cisco Messaging Interface operates in default mode.
The Registry entries for configuring the Cisco Messaging Interface are located in:
HKEY_LOCAL_MACHINE/Software/Selsius Systems Inc./Selsius Unified Messaging Interface/
The available Registry entries for the Cisco Messaging Interface are:
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NoteDebug Trace Flags
Cisco CallManager provides debug trace functionality for advanced error handling. The debug trace flags are most commonly used by the Cisco Technical Assistance Center (TAC) to resolve problems with Cisco CallManager. You can access the trace flags through Cisco CallManager Administration by selecting Control Center and then clicking the Show button for Cisco CallManager Debug Trace Flags.
DTMF Signaling
Cisco CallManager now treats all DTMF signals as out-of-band, and it is now possible to pass digits in both directions on H.323 type devices.
Enhanced 911 Service
Enhanced 911 (E911) service is available for your Cisco IP Telephony system. Cisco CallManager provides the appropriate calling line ID information and signaling required for E911. Connection to E911 service providers is available through third-party sources. For more information on connecting your Cisco IP Telephony system to E911 services, visit the Cisco web site at http://www.cisco.com.
License Management
License Management has been disabled in Cisco CallManager for release 2.4(3) and 2.4(4). Please ignore any prompts from Cisco CallManager Administration that ask you to enter License Management information.
Line Selection
When you answer a multi-line phone (take the phone off-hook), the default behavior is for the phone to select the ringing line automatically. You can modify this behavior so that the phone always selects the prime line (line 1) when you go off-hook. To enable prime line selection for all phones, set the AlwayUsePrimeLineFlag to 1 in the SCM.INI file. If prime line selection is enabled, users must always press a line button to select a line other than the prime line, even if there is an incoming call on that other line.
Media Termination Point
You now have the option to control Media Termination Point (MTP) parameters by changing the settings in the Windows Registry. For details, see "Configuring the Media Termination Point" in the online System Guide.
Remote Serviceability
Remote serviceability enables Cisco CallManager to be serviced from a remote location while maintaining the security of your site. This release of Cisco CallManager implements two features for remote serviceability:
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Reset Option for Configuring Cisco IP Phones
The Device Wizard in Cisco CallManager Administration contains a new option for resetting a Cisco IP Phone while you are configuring the phone in the database. After you enter the configuration data for the phone and click Finish, two new buttons appear:
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If the phone is not yet physically installed on the network, you can click OK, reset now without interrupting call processing. If the phone is already installed on the network, then you might want to click OK, reset later to avoid interrupting call processing for that phone. Later, when the phone is not busy, you can reset it by clicking the Reset button for that phone in Cisco CallManager Administration, by pressing **#** on the phone, or by reconnecting the phone to the network.
NoteTone on Hold, Transfer, and Call Park
The party placed on hold, transfer, or call park hears an intermittent tone once every 10 seconds. Currently there is no tone on hold, transfer, or call park for calls going through a Media Termination Point. Also, if the party on hold, transfer, or call park activates a feature such as hold, the tone is not retained for either party on the call.
Voice Messaging
Cisco uOne is a voice messaging system that combines with Cisco CallManager to provide voice messaging services over an IP network. Cisco uOne is sold separately from Cisco CallManager. Cisco uOne is currently available only for the Cisco Media Convergence Server 7830 and only in the North American market.
Wherever possible, Cisco uOne supports industry standard internet messaging protocols such as LDAP, IMAP, MIME, SMTP and HTTP. For this release, Cisco uOne provides the following features:
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You can install only one voice messaging system (either Cisco uOne or third-party voice mail) per installation of Cisco CallManager.
NoteImportant Notes
The latest software upgrades and release notes are available on Cisco Connection Online (CCO) at:
http://www.cisco.com/public/sw-center/internet/callmgr/callmgr.html
Cisco Year 2000 product compliance information can be found at:
http://www.cisco.com/warp/public/752/2000/
A local copy of the online Help is installed with Cisco CallManager, and you can access it by clicking Start>Programs>Cisco CallManager>Cisco Help>System Guide. The System Guide is also available on the Web at:
http://www.cisco.com/documentation/ccm/v24/index.htm
You should perform regular system backups as described in the topic Backing Up the System in the online System Guide at:
http://www.cisco.com/documentation/ccm/v24/index.htm
For instructions on backing up the system, select the following book and topic in the menu:
Cisco CallManager>Backing up the system.Caveats
This section contains unresolved caveats for this release of Cisco CallManager. Caveats describe unexpected behavior or defects in Cisco CallManager software and related hardware.
Open Caveats for Cisco CallManager Release 2.4(4)
This section describes possibly unexpected behavior by Cisco CallManager Release 2.4(4).
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Description: Sound problem for holding line. This problem can be seen after connecting a call. After connecting a call, if it does a holding action on both sides, then the holding sound can't be heard if only one side releases the holding action.
Workaround. None.
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Description: Voice greeting fades when recording from Cisco IP Phone to Cisco uOne. When recording a voice greeting to Cisco uOne, the first couple of seconds are normal volume, then the voice will fade to lower volume. If the user speaks softly, the greeting will degrade into nothing. This condition is caused by the Echo Cancellation in any phone load that ends with 'J4'.
Workaround: If you are using Cisco uOne with your Cisco CallManager, use a phone load other then one ending in 'J4'.
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Description: The status of the phone is not being updated in Cisco WebAttendant.
Workaround: To work around the problem:
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Description: If a random sequence of button pushes causes the Transfer button to quit working, the Cisco IP Phone cannot complete the transfer, and the buttons on the phone no longer work.
Workaround: Unplug the phone for 2 minutes or more, then plug the phone back in.
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Description: Even at low call rates through the DT-24+, the collision light will show activity and will increase proportionate to the call volume.
Workaround: There is no workaround needed; there will be some activity on the collision light without impacting service, even at very high volumes.
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Description: BootP fails on Cisco MCS7830 and MCS7820 platforms. BootP gets error 10048, "Unable to create socket" when you save and load the configuration. This problem only occurs at sites where DHCP is not running and the customer is using the BootP utility for some gateway devices (Cisco AS, AT, and DT24+ gateways).
Workaround: Install the BootP utility on another PC (other than the PC that is running Cisco CallManager).
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Description: No call progress when calling a busy user over a Cisco Access Digital Trunk Gateway DE-30+.
When placing a call out a DE-30+ and the called user is busy, the Cisco IP Phone displays the date and time instead of the user busy tone.
Workaround: None.
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Description: When you enable the service parameter "Block Offnet to Offnet Transfer" and make a blind transfer with Cisco Unity Connection, the Q.931 SETUP message which CUCM sends to the PSTN gateway for an outbound PRI call still reaches the gateway. This transfer results in a dropped call.
Workaround: None.
Open Caveats for Cisco CallManager Release 2.4(3)
This section describes possibly unexpected behavior by Cisco CallManager Release 2.4(3). Unless otherwise noted, these caveats apply to all Cisco CallManager 2.4 releases up to and including Cisco CallManager Release 2.4(3).
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Description: The exclamation point character (!) in a route pattern does not work as expected if it is followed by the pound sign character (#). The exclamation point character normally represents one or more digits 0 through 9, but it allows only a single digit when followed by the pound sign character. For example, the route pattern 011!# allows a caller to dial 0112 or 0112#, but it does not allow 01123.
Workaround: Create two route patterns, one with the pound sign character and one without. Define the route pattern with the pound sign character first. For the example above, the two route patterns would be 011!# and 011!.
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Description: When it is first installed and configured, Media Termination Point (MTP) shows no resources available.
Workaround: Using Cisco CallManager Process Control, stop and restart the MTP process only.
Open Caveats for Cisco CallManager Release 2.4(2b)
This section describes possibly unexpected behavior by Cisco CallManager Release 2.4(2b). Unless otherwise noted, these caveats apply to all Cisco CallManager 2.4 releases up to and including Cisco CallManager Release 2.4(5).
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Description: Cisco IP Phones generate an echo (feedback) when used at maximum volume.
Workaround: To reduce or eliminate the echo, set the volume to no more than 75% of maximum volume.
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Description: If the greeting message for Cisco uOne voice mail is recorded using the speakerphone, the volume drops substantially. This problem has not been observed on any supported voice mail systems other than Cisco uOne.
Workaround: Always use the handset to record the greeting message for Cisco uOne voice mail.
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Description: After upgrading to the latest release of Cisco CallManager and installing the Plug-Ins, the icons for the Plug-Ins do not appear in the System Tray and the configuration screens for the Plug-Ins are not accessible.
Workaround: Using Cisco Process Control, stop all processes and then restart them.
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Description: If a user has a call on transfer hold and receives an incoming call, any attempt to transfer the incoming call results in that call being connected to the call on transfer hold.
Workaround: The call transfer feature in Cisco CallManager is commonly referred to as a consultation transfer, and it first places the transferred call on hold. If you have one call on transfer hold when a second call comes in, any attempt to transfer the second call results in a conference connection between the two calls on transfer hold. To avoid this situation, you can disable the call waiting feature if it is not needed for the phone in question.
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Description: The description in the online documentation for configuring a Media Termination Point (MTP) is incomplete.
Workaround: First install the MTP plug-in as described in the online documentation under "Installing a Media Termination Point." Next, configure the MTP plug-in as described in the online documentation under "Configuring the Media Termination Point." Then use the Device Wizard to add an MTP device to the Cisco CallManager database, as described in the online documentation under "Adding a Media Termination Point."
Open Caveats for Cisco CallManager Release 2.4(1)
This section describes possibly unexpected behavior by Cisco CallManager Release 2.4(1). Unless otherwise noted, these caveats apply to all Cisco CallManager 2.4 releases up to and including Cisco CallManager Release 2.4(5).
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Description: A hairpinned call from a Cisco AS5300 with different codecs (G.711 and G.723) to Cisco CallManager fails with a "Resources unavailable" error. Incoming voice dial peers (IP) are not compared strictly with dial peers in the configuration. In the configuration, there are two dial peers with different codecs (G711ulaw and G723r63) for connection with Cisco CallManager. The first dial peer was attached to a G711ulaw codec and the second was attached to a G723r63. When testing calls from Cisco IP phones in this configuration, calls could be made with the G711ulaw but not with the G723r63. (Error code was 2F - No resource.)
Workaround: Change codecs so that the first dial peer has G723R63 and the second one has G711ulaw. Both codecs should work under this new configuration.
Open Caveats for Cisco CallManager Release 2.3(1b) and 2.3(2)
This section describes possibly unexpected behavior by Cisco CallManager Release 2.3(1b) and 2.3(2). Unless otherwise noted, these caveats apply to all Cisco CallManager releases up to and including Cisco CallManager Release 2.4(5).
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Description: The Call Direction parameter field for the T1 port of the Cisco Access Digital Gateway DT-24 does not appear to work. Call Direction specifies the direction of calls passing through this port. Allowed settings are:
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Workaround: Use a 24-port Cisco Access Digital Gateway PRI or an 8-port Cisco Access Analog Trunk Gateway.
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Description: When a call is placed to a voice gateway, the caller first hears internal dial tone. The caller then dials the access code for an off-net call. External dial tone is heard, and the call is made and then cleared normally.
When the caller uses the redial feature, he first hears internal dial tone. When the caller presses the redial key, he hears external dial tone for five seconds or so before the connection is made. This dial tone is played out for too long and should be replaced with silence.
Workaround: There is no current workaround. The issue appears to be due to the long time required to connect through the H.323 Gateway. The issue is still under investigation.
Open Caveats for Cisco CallManager Release 2.2
This section describes possibly unexpected behavior by Cisco CallManager Release 2.2. Unless otherwise noted, these caveats apply to all Cisco CallManager releases up to and including Cisco CallManager Release 2.4(5).
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Description: Existing route filter values cannot be seen in the form view of the Route Filter Configure dialog box.
Workaround: Entering multiple route filters causes the behavior described above. Cisco CallManager accepts only single route filter entries. This issue will be addressed in a future release.
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Description: After a client places a Directory Services Call via the web browser, use of the browser Back button can cause the call to be placed again.
Workaround: After placing a Directory Services Call, refresh the Active Server Page (ASP) so that the browser Back button will not redial the previously placed call.
Troubleshooting
Troubleshooting is provided in the locally installed Help or the online System Guide at:
http://www.cisco.com/documentation/ccm/v24/index.htm
Click the Troubleshooting book in the menu to see the troubleshooting topics.
Documentation Updates
You can access information about Cisco CallManager Release 2.4 by using the System Guide on the Web instead of the locally installed version available from the Start menu. To access the Web version of the System Guide, open a web browser and type the URL:
http://www.cisco.com/documentation/ccm/v24/index.htm
The latest software upgrades and release notes are available on Cisco Connection Online (CCO) at:
http://www.cisco.com/public/sw-center/internet/callmgr/callmgr.html
Obtaining Documentation
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
Documentation CD-ROM
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Ordering Documentation
Registered CCO users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/pcgi-bin/subcat/kaojump.cgi.
Nonregistered CCO users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).
Obtaining Technical Assistance
Cisco provides Cisco Connection Online (CCO) as a starting point for all technical assistance. Warranty or maintenance contract customers can use the Technical Assistance Center. All customers can submit technical feedback on Cisco documentation using the web, e-mail, a self-addressed stamped response card included in many printed docs, or by sending mail to Cisco.
Cisco Connection Online
Cisco continues to revolutionize how business is done on the Internet. Cisco Connection Online is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.
CCO's broad range of features and services helps customers and partners to streamline business processes and improve productivity. Through CCO, you will find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online support services, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.
Customers and partners can self-register on CCO to obtain additional personalized information and services. Registered users may order products, check on the status of an order and view benefits specific to their relationships with Cisco.
You can access CCO in the following ways:
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You can e-mail questions about using CCO to cco-team@cisco.com.
Technical Assistance Center
The Cisco Technical Assistance Center (TAC) is available to warranty or maintenance contract customers who need technical assistance with a Cisco product that is under warranty or covered by a maintenance contract.
To display the TAC web site that includes links to technical support information and software upgrades and for requesting TAC support, use www.cisco.com/techsupport.
To contact by e-mail, use one of the following:
In North America, TAC can be reached at 800 553-2447 or 408 526-7209. For other telephone numbers and TAC e-mail addresses worldwide, consult the following web site: http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.
Documentation Feedback
If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.
You can e-mail your comments to bug-doc@cisco.com.
To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:
Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate and value your comments.
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