Table Of Contents
Cisco IP Phone 7905G/7912G (SIP) Release Notes for Firmware Release 1.2.0
These release notes are for use with the Cisco IP Phone models 7905G and 7912G running under the Session Initiation Protocol (SIP) and running software release 1.2.0.
These release notes include the following sections:
Installing Required Firmware for the Cisco IP Phone
Before using a Cisco IP Phone model 7905G or 7912G with SIP, you must install the appropriate firmware on the phone. Refer to the Readme.txt file that is included with the phone software package for more information.
For more information about Cisco IP Phones, refer to the following publications, which are available at this URL:
•Cisco IP Phone 7905G/7912G User Guide for Cisco CallManager
•Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
•Regulatory Compliance and Safety Information for the Cisco IP Phone 7900 Series
What's New in this Release
The following sections describe new and enhanced features in this release:
Additional Time Zones Support
The TimeZone parameter has been enhanced to provide support for time zones that are offset by increments of 30 minutes and 45 minutes. This parameter continues to support the integers 0 through 24 for time zones that are offset by 60 minute increments, as shown in Table 1.
With this release, the TimeZone parameter can also accept the integers -720 through -60 and 60 through 780. These integers specify the time zone offset in minutes from GMT and are used for locations with time zone offsets of 30 minutes and 45 minutes increments.
The formula for calculating the TimeZone parameter value in minutes is:
(offset hours * 60 minutes/hour) + offset minutes = total minutes
For example, for the Darwin time zone of GMT + 9:30, the calculation is:
(9 hours * 60 minutes/hour) + 30 minutes = 570 minutes
Table 2 shows examples of TimeZone parameter values for time zones with offsets of 30 minutes and 45 minutes increments.
D Rule for Displaying Caller ID
The D rule has been added to the DialPlan parameter. This rule lets you specify a called number for which caller ID is always displayed, even if you have blocked caller ID.
The syntax for the D rule is:
where nnnn is a called number to which caller ID is always displayed. The D rule is checked before the R rule.
The called number nnnn can be specified using negation, subrule matching, and range. For more information, see the "Advanced Syntax for Dial Plan Rules" section.
The following dial plan rule causes caller ID to always be displayed when the called number is 911:
The following lines will be written to the prserv log file when the dialed number matches the the number specified for the D rule.
Note The first line will always appear if you do not have caller ID blocked. The second line will appear only if the D rule is specified.
•call_id is 0 for the first leg of a call or 1 for the second leg of a call
•num is the telephone number dialed
R Rule for Enhanced Prefix
The R rule has been added to the DialPlan parameter. This rule is for automatically prepending a specified prefix to the dialed string. If more than one R rule matches, the first matched R rule is used.
The syntax for the R rule is:
•- is one or more dashes (-). The number of dashes is the number digits preceding the prefix that will be removed.
•nnnn is the dial string to prepend.
•tttt is a trigger string. If the dialed numbers match this string, this match triggers the prepending of a variable-length prefix (as specified by nnnn) to the dial string. The triggered string is not removed from the dial string.
The trigger string tttt can be specified using negation, subrule matching, and range. For more information, see the "Advanced Syntax for Dial Plan Rules" section
Table 3 shows three examples of the R dial plan rule.
The following line will be written to the prserv log file when the dialed string matches the R rule:Call Prefix prefix+num
•prefix is the number that is prepended to the dialed string
•num is the telephone number dialed
Advanced Syntax for Dial Plan Rules
You can use the commands shown in Table 4 to specify the called number (nnnn) in the D dial plan rule and the trigger string (tttt) in the R dial plan rule.
Note You can also use these commands with other dial plan rules.
Table 5 shows examples of the dial plan rules advanced syntax.
G.729 Annex B Support
The Cisco IP Phone models 7905G and 7912G for SIP indicate G.729 Annex B codec support by using a=fmtp and a=rtpmap attribute in the SDP body of outgoing INVITE requests and 183 and 200 responses to INVITE requests. For the G.729 codec, the value of a=ftmp is 18 and the annexb value is either yes or no. The default for annexb is yes.
Table 6 lists the possible G.729 codec configuration and resulting negotiated codec.
The following partial SDP body shows the media m= field and attribute a= field for a phone with G.729 codec and Annex B specified:m=audio 16384 RTP/AVP 18 101a=rtpmap:18 G729/8000/1a=fmtp:18 annexb=yes
Selectable Host Target for Forwarded Calls
You can now set bit 0 in the ConnectMode parameter to designate the destination of the new INVITE request that results from a forwarded call.
You can set bit 0 to 0 or 1, where:
•0=Send the new INVITE request via the SIP proxy server regardless of the destination that is specified in the Contact header of the 302 response. (0 is the default value.)
•1=Send the new INVITE request to the destination that is specified in the Contact header of the 302 response.
EncryptKeyEx is a new configuration parameter for the Cisco IP Phones models 7905G and 7912G (SIP). This parameter provides a stronger configuration file encryption key than the previously used EncryptKey parameter.
The syntax of the EncryptKeyEx parameter is:
•rc4KeyInHex_n is the encryption key, specified as a hexadecimal string of 1 to 64 characters.
•/macInHex_12 is an optional extension consisting of a forward slash (/) followed by the six-byte MAC address of the Cisco IP phone to which the configuration file will be downloaded. If you use this option, only the phone with the MAC address that you specify will be able to decrypt the file.
When the EncryptKeyEx parameter is set to 0, the Cisco IP Phone TFTP configuration file name is ldMAC_address (for the Cisco IP Phone 7905G) or gkMAC_address (for the Cisco IP Phone 7912G). MAC_address is the lowercase hexadecimal representation of the phone's MAC address. For example, if the Cisco IP Phone 7905G has a MAC address of 102030405060, the TFTP configuration file name is ld102030405060
Note If the the DHCP bootfile option field specifies a value, that value is used instead of ldMAC_address or gkMAC_address.
When the value of EncryptKeyEx is 0, the value of EncryptKey (if nonzero) is used to encrypt the Cisco IP phone configuration file.
If the EncryptKeyEx parameter is set to value other than 0, the configuration file name is ldMAC_address.x (for the Cisco IP Phone 7905G) or gkMAC_address.x (for the Cisco IP Phone 7912G), and the value of the EncryptKeyEx parameter is used to encrypt the Cisco IP phone profile file.
Note You can configure the EncryptKeyEx parameter by using the Cisco IP Phone web configuration page or by using the TFTP configuration method.
You must use release 2.3 of the cfgfmt tool with the new EncryptKeyEx parameter. This tool is bundled with the Cisco IP Phone models 7905G and 7912G software release 1.2.0 and later. This tool creates two configuration files, one file named ldMAC_address format (for the Cisco IP Phone 7905G) or gkMAC_address (for the Cisco IP Phone 7912G), as the previous release of the cfgfmt tool created, and one with the .x extension.
See the "New cfgfmt Tool" section for information about using the cfgfmt tool with the EncryptKeyEx parameter.
The following examples use the TFTP configuration method to illustrate how to use the EncryptKeyEx parameter.
This example assumes that a Cisco IP Phone 7912G starts with a firmware release earlier than 1.2.0 and that phone needs to upgrade to firmware release 1.2.0 so that it can use the EncryptKeyEx parameter to encrypt its configuration file.
The Cisco 7912G IP phone in this example has a MAC address of 102030405060.
Step 1 Create a file called gk102030405060.txt by using the applicable example.txt file provided with the Cisco 7912G IP phone software.
(The example.txt file is called sipexample.txt.)
Step 2 Modify the gk102030405060.txt file with desired parameter values.
The value of the EncryptKey parameter should be 0.
Step 3 Set the value of the EncryptKeyEx parameter to the desired encryption key for gkMAC_address.x.
You can also restrict the EncryptKeyEx value to apply only to the Cisco IP Phone 7912G with a particular MAC address. For example, if the EncryptKeyE value is 231e2a7f10bd7fe, you can specify EncryptKeyEx as:
With this setting, only the phone with the MAC address 102030405060 will be allowed to use the EncryptKeyEx value specified.
Step 4 Update the upgradecode parameter to instruct the Cisco IP Phone to upgrade to firmware release 1.2.0.
In this example, you would modify this parameter as follows for the Cisco 7912G IP phone:
Step 5 Run the cfgfmt tool as follows:
cfgfmt -g -tsip_ptag.dat gk102030405060.txt gk102030405060
This command will generate the following files:
The file gk102030405060 is unencrypted.
Note Some parameters specified in the sip_ptag.dat file used by the cfgfmt tool are marked as sensitive information. (These parameters include UIPassword, UID, PWD0). These parameters are not included in the resulting ldMAC_address file (for the Cisco IP Phone 7905G) or the gkMAC_address file (for the Cisco IP Phone 7912G) if you specify -g when you run cfgfmt. For more information, see the "New cfgfmt Tool" section.
The file gk102030405060.x is encrypted with EncryptKeyEx value.
Step 6 Place the gk102030405060 and the gk102030405060.x files on the TFTP server that the phone will contact for its configuration files.
When the phone powers up, it will obtain its IP address from the DHCP server. If the DHCP server specifies the TFTP server address, the phone will contact the TFTP server obtained from DHCP because the phone is not preconfigured with a TFTP server address. The boot process is as follows:
1. The phone downloads the configuration file gk102030405060 from the TFTP server.
2. The phone applies parameter values in the file gk102030405060 to its internal configuration while ignoring the EncryptKeyEx parameter (because the older release of the Cisco 7912G IP phone does not yet recognize the EncryptKeyEx parameter).
3. The phone upgrades to the 1.2.0 firmware load.
4. The phone reboots.
5. The phone downloads the configuration file gk102030405060.
6. The phone applies the value of the EncryptKeyEx parameter to its internal configuration.
7. The phone reboots.
8. The phone EncryptKeyEx value is provisioned, so from this point forward the phone will download the gk102030405060.x file at each reboot and each time the value configured in the CfgInterval parameter expires.
Note Although EncryptKeyEx is encrypted in the profile file, which does not contain other sensitive information, Cisco recommends that for absolute security you pre-provision the Cisco IP phone as described in this example for a private network. Alternatively, you should remove the profile file after EncryptKeyEx is provisioned.
This example assumes that a Cisco IP Phone 7912G is already deployed (with the EncryptKey value set) with firmware release earlier than 1.2.0 and that the phone needs to upgrade to release 1.2.0 firmware to use EncryptKeyEx to encrypt its configuration file.
To upgrade the phone, follow the same procedure as in Example 1, except set the EncryptKey value to the previously provisioned EncryptKey value (instead of to 0). In this way, the gkMAC_address file will be encrypted with EncryptKey as the phone expects. The phone can then begin using the gkMAC_address.x file encrypted with EncryptKeyEx.
New cfgfmt Tool
You use the cfgfmt tool to generate a Cisco IP Phone configuration file. Release 2.3 of the cfgfmt tool supports a stronger encryption method than the previous release of this tool.
The syntax of the new cfgfmt tool is:cfgfmt [options] input-text-file output-binary-file
Table 7 describes the cfgfmt tool options.
Note Entering cfgfmt with no options or arguments displays a list and brief description of options for the command.
Table 8 describes Severity 1, 2, and 3 defects that were resolved in this release.
Table 9 describes Severity 1, 2, and 3 defects in this release.
If you have an account with Cisco.com, you can use the Bug Toolkit to find defects of any severity for any release.
To access the Bug Toolkit, perform either of these actions:
•Go to this URL: http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl
•Log in to Cisco.com, click Technical Support, then click Tools & Utilities, then click Software Bug Toolkit under Troubleshooting Tools
Table 9 Open Defects in this Release
Identifier Headline and Bug Toolkit Link
Simultaneous Hold/UnHold does not work with 7912G/7905G SIP IP phones
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