How to Configuring a Call Transfer from IP Phone in CME?

Transferring calls represents another common function in voice networks. To transfer a call, hit the Trnsfer softkey while on an active call. (Note that this is not a typo: "Trnsfer" without the a is correct.) When you do, you will hear another dial tone, at which point you can dial the phone number to which you want to transfer your active call. What happens from there depends on the transfer method configured on the CME router. There are two transfer methods available:

1-Consult: Consult transfer allows you to speak with the other party before transfer ring the call. After you dial the number to which you would like to transfer the call, you can wait for the other party to answer and speak with them before transferring the call. Pressing the Trnsfer softkey a second time transfers the call, dropping you out of the conversation. Consult transfers require a second line (or dual-line configuration). This is the default transfer mode in CME.

2-Blind: Blind transfer immediately transfers the call after you have dialed the number (you do not hit the Trnsfer softkey a second time). Blind transfers can work in a single-line configuration.

Configuring CME Transfer Methods System-Wide

CME_Voice(config)# telephony-service

CME_Voice(config-telephony)# transfer-system ?

CME_Voice(config-telephony)# transfer-system full-consult

By default, the Cisco router restricts transfers to devices that are not locally managed.This is usually a good policy, because transferring outside of the company can result in toll fraud. For example, a user could transfer an outside caller to an international number,causing the toll charges to be billed to the organization rather than the outside caller. If you would like to allow transfers outside of the locally managed devices, you can use the transfer-pattern <pattern> command from telephony service mode, where pattern represents numbers to which you would like to allow transfers. Example 6.5 configures the Cisco Unified CME router to allow transfers to 5XXX extensions and local ten-digit PSTN numbers.

Configuring CME Transfer Patterns to Allow Outside Transfers

CME_Voice(config)# telephony-service

CME_Voice(config-telephony)# transfer-pattern ?

WORD digit string pattern for permitted non-local call transfers

CME_Voice(config-telephony)# transfer-pattern 5...

CME_Voice(config-telephony)# transfer-pattern 9..........

Suggested Reading

How to Configure Ephones and Ephone-DNs in CME?

How to Configure Shared-Line and Overlay Options in CME?

How to Configuring a Voice Network Directory in CME?

How to Configuring a Call Forwarding from the IP Phone in CME?

How to Configuring Call Transfer from IP Phone in CME?