Unified CM service parameters that change transfer behaviour

See also

Sources

1. 1
   For blind transfers initiated over SCCP, Unified CM provides call progress indication to the transferred user in the form of ring-back.

   Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), Call Transfer Overview, page 495 · Checked 2026-09-15
2. 2
   The Block OffNet to OffNet Transfer service parameter cancels transfers between two external gateways when set to True, and the default is False, so a system allows external to external transfer until an administrator stops it.

   System Configuration Guide for Cisco Unified Communications Manager Release 15 and SUs, complete book, Internet Archive capture · System Configuration Guide Release 15, Block OffNet Gateway Transfers, page 117 · Checked 2026-09-15
3. 3
   When the block is in force and a user attempts a transfer over an external gateway or trunk, a message is displayed on the user's phone saying the call cannot be transferred.

   Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), External Call Transfer Restrictions Overview, page 509 · Checked 2026-09-15
4. 4
   Whether a gateway counts as external is decided by the Call Classification setting, so the transfer block depends on a second parameter and blocks nothing until devices are classified.

   System Configuration Guide for Cisco Unified Communications Manager Release 15 and SUs, complete book, Internet Archive capture · System Configuration Guide Release 15, Block OffNet Gateway Transfers, page 117 · Checked 2026-09-15
5. 5
   Consult transfer and blind transfer require no separate configuration on Unified CM: the same Transfer control produces both and the difference is only whether the transferring party presses it the second time before or after the target answers.

   Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), Call Transfer Overview, page 495 · Checked 2026-09-15
6. 6
   Direct Transfer joins two already established calls into one and drops the initiator, and it neither initiates a consultation call nor puts the active call on hold.

   Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), Call Transfer Overview, pages 495 to 496 · Checked 2026-09-15
7. 7
   A call transferred to a hunt pilot while an announcement is in progress is redirected only after the announcement completes.

   Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), Call Transfer Restrictions, page 508 · Checked 2026-09-15
8. 8
   For an incoming call only the gateway and trunk call classification settings are used to classify it as internal or external, and route pattern classification settings do not apply.

   Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), External Call Transfer Restrictions Overview, page 510 · Checked 2026-09-15
9. 9
   Logical partitioning does not apply to a transfer when both the transferred and the destination devices are VoIP phones, nor when geolocation or a geolocation filter is not associated with a device.

   Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), Call Transfer Restrictions, page 508 · Checked 2026-09-15
10. 10
    The external transfer restriction is defined over four named roles: the originating end is the device that gets transferred, the terminating end is the device that receives the transferred call, and each is considered internal or external by its network location.field report

    Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), External Call Transfer Restrictions Overview, page 509 · Checked 2026-09-15
11. 11
    A port interface configured with its own Call Classification overrides the clusterwide service parameter, and by default each port takes the clusterwide setting.field report

    System Configuration Guide for Cisco Unified Communications Manager Release 15 and SUs, complete book, Internet Archive capture · System Configuration Guide Release 15, Configure Clusterwide Call Classification for Gateway, page 116 · Checked 2026-09-15
12. 12
    The precedence upgrade a transfer performs does not work over a trunk device such as an intercluster trunk or a PRI trunk.

    Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), Call Transfer Interactions, page 507, note · Checked 2026-09-15
13. 13
    A gateway's calls can also be classified by associating the gateway with a route pattern and setting Call Classification on the route pattern, so three places can decide whether a call is external.

    System Configuration Guide for Cisco Unified Communications Manager Release 15 and SUs, complete book, Internet Archive capture · System Configuration Guide Release 15, Block OffNet Gateway Transfers, closing note, page 117 · Checked 2026-09-15
14. 14
    The Transfer On-Hook Enabled service parameter determines whether going on hook after initiating a transfer completes it, and it applies to consult and blind transfers alike.

    Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), Call Transfer Overview and Configure Transfer On-Hook, pages 495 and 501 · Checked 2026-09-15
15. 15
    Unified CM upgrades the precedence level of a call leg involved in a transfer when the two segments have different precedence, so a transfer can raise the priority of the remaining party's call.

    Feature Configuration Guide for Cisco Unified Communications Manager Release 11.0(1), complete book, Internet Archive capture · Feature Configuration Guide 11.0(1), Call Transfer Interactions, page 507 · Checked 2026-09-15

Documents

Cite this page

WarmTransfer. (2026, September 15). Unified CM service parameters that change transfer behaviour. WarmTransfer. https://warmtransfer.net/knowledge/cucm-service-parameters-for-transfer

@misc{warmtransfer-cucm-service-parameters-for-transfer,
  title  = {Unified CM service parameters that change transfer behaviour},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/cucm-service-parameters-for-transfer},
  note   = {Verified 2026-09-15}
}