Configuring a transfer pattern

Fri, 04 Dec 2015 | IP Telephony

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Call transfer is a function that can be configured in various ways, depending on the supported protocols. These call transfer commands include system-wide settings that can be overridden with phone specific settings, which can be overridden by settings on the transfer pattern.

Call Transfer (Cont.) Configuring

router(config-telephony-service)#

transfer-system {blind | full-blind | full-consult | local-consult}

• Specifies the call transfer method for all Cisco CME extensions

CMERouter(config-telephony-service)#transfer-system full-blind

To specify the call transfer method for IP phone extensions system-wide that use the ITU-T H.450.2 standard, use the transfer-system command in telephony-service configuration mode. To disable the call transfer method, use the no form of this command.

When H.450.2 call transfer is selected using the full-blind blind keyword the call is transferred without consultation using the H.450.2 standard. When a call is transferred using the blind keyword (the default) the call is blindly transferred using a single line and a Cisco proprietary method. When the full-consult keyword is used the call is transferred with consultation using the H.450.2 standard. The local-consult uses consultation with local calls and blindly transfers for non-local calls. The local-consult uses a proprietary transfer mechanism and is not commonly used.

Note Cisco CME 3.1 provides full call-transfer and call-forwarding interoperability with call processing systems on the network that support H.450.2, H.450.3, and H.450.12 standards. For call processing systems that do not support H.450 standards, Cisco CME 3.1 provides VoIP-to-VoIP hairpin call routing without requiring the use of the special Tool Command Language (Tcl) script that was needed in earlier releases of Cisco CME.

Transfer System Command

Command

Description

transfer-system {blind | full-blind | full-consult | local-consult}

Example:

Router(config-telephony-service)# transfer-system full-consult

Defines the call transfer method to allow call transfer with consultation for all lines served by the router.

• blind—Calls are transferred without consultation with a single phone line using the Cisco-proprietary method.

• full-blind—Calls are transferred without consultation using H.450.2 standard methods.

• full-consult—Calls are transferred with consultation using H.450.2 standard methods and a second phone line if available. The calls fall back to full-blind if the second line is unavailable.

• local-consult—Local calls are transferred with local consultation using a second phone line if available. The calls fall back to blind for non-local consultation or nonlocal transfer target.

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Call Transfer (Cont.) Configuring

router(config-ephone-dn)#

transfer-mode {blind | consult}

• Specifies the type of call transfer for an individual IP phone extension number

CMERouter(config-ephone-dn)#transfer-mode consult

To specify the type of call transfer for an individual IP phone extension that uses the ITU-T H.450.2 standard, use the transfer-mode command in ephone-dn configuration mode. To remove this specification, use the no form of this command.

The transfer mode command specifies the type of call transfer for an individual Cisco IP phone extension that is using the ITU-T H.450.2 protocol. It allows you to override the system default transfer-system setting (full-consult or full-blind) for that ephone-dn extension. For example, in a Cisco CME network that is set up for consultative transfer, a specific extension with an auto-attendant that automatically transfers incoming calls to specific extension numbers can be set to use blind transfer because auto-attendants do not use consultative transfer.

Transfer Mode Command

Command

Description

transfer-mode {blind | consult}

Example: Router(config-ephone-dn)#transfer-mode blind

This command specifies the type of call transfer for an individual Cisco IP phone extension that is using the ITU-T H.450.2 protocol. It allows you to override the system default transfer-system setting (full-consult or full-blind) for that extension.

• blind — Transfers calls without consultation using a single phone line.

• consult — Transfers calls with consultation using a second phone line, if available.

Call Transfer (Cont.) Configuring

router(config-telephony-service)#

transfer-pattern transfer-pattern [blind]

• To allow transfer of telephone calls from Cisco IP phones to phones other than Cisco IP phones

CMERouter(config-telephony-service)#transfer-pattern 2095559... blind

To allow the transfer of telephone calls from CallManager IP phones to non-local destinations, use the transfer-pattern command in telephony-service configuration mode. To disable these transfers, use the no form of this command.

The transfer-pattern command allows you to transfer calls to destinations other than local IP Phones. This includes non-IP phones and external destinations. A call is then established between the transferred party and the new recipient. By default, all Cisco IP phone extension numbers are allowed as transfer targets. The default is that all transfers will be consultative in nature. The optional blind keyword forces calls that are transferred to numbers that match the transfer pattern to be executed as blind or full-blind transfers, overriding any settings made using the transfer-system and transfer-mode commands. When defining transfers to non-local numbers, it is important to note that transfer-pattern digit matching is performed before translation-rule operations. Therefore, you should specify in this command the digits actually entered by phone users before they are translated.

Transfer Pattern Command

Command

Description

transfer-pattern transfer-pattern [blind]

Example: Router(config-telephony-service)# transfer-pattern .T

Allows transfer of telephone calls by Cisco IP phones to specified phone number patterns. If no transfer pattern is set, the default is that transfers are permitted only to other local IP phones.

transfer-pattern—String of digits for permitted call transfers. Wildcards are allowed. A pattern of .T transfers all calling parties using the H.450.2 standard.

• blind—(Optional) When H.450.2 consultative call transfer is configured, forces transfers that match the pattern specified in this command to be executed as blind transfers. Overrides settings made using the transfer-system and transfer-mode commands.

Note When defining transfers to non-local numbers, it is important to note that transfer-pattern digit matching is performed before translation-rule operations. Therefore, you should specify in this command the digits actually entered by phone users before they are translated.

Call Forwarding

This topic describes the Cisco CME call forwarding commands.

Forwarding call settings govern the behaviors and destinations that the calls will be forwarded to in various situations that may occur such as the destination is busy, or the phone rings but no one answers, or all calls may be desired to be forwarded. On a users phone the ring no answer and busy settings usually will be set by the administrator to go to the voice mailbox of that user. Other type of extensions may not have the same behavior and might have no settings or may forward to another extension constructing something like a hunt group.

The forward all setting can be set on the IP phone by the user. For example a user may be going on vacation and wishes all calls to be handled by another employee. This is a very common situation that occurs in many deployments.

Using the phone to set the forward all setting is done by pressing the "CFwdAll" softkey button and entering the number to which all calls will be forwarded, followed by the # key to tell the system you are done entering digits. The forward destination will be displayed on the bottom of the IP phone screen. To remove the forward all, press the "CFwdAll" softkey button again. This turns off the forward all. The user or administrator can also use the GUI Web interface of Cisco CME to configure the call forward options.

Forward all, busy, and no answer all in the phone user Web pages

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From the phone user Web interface, the user is able to configure a line on the phone to forward all, forward busy and forward no answer. A user is only able to configure the phone on which he/she has credentials defined.

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