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Phone codes for call forwarding

The standard GSM and European service codes to activate, cancel and check call forwarding on landlines and mobile phones.

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Most EU fixed-line carriers use the following codes, based on CEPT and ETSI standards developed in the 1970s for both POTS and ISDN lines. There may be some variation, but the unconditional code *21* is almost universally standard on EU telephone lines.

The general syntax for all European service codes follows the patterns below. Replace [phone number] with your Kollie agent's number.

Fixed lines

Forward serviceActivateCancel & retainRe-establishStatus
If busy*69*[phone number]# or *67*[phone number]##69# or #67#*69# or *67#*#69# or *#67#
If not answered*61*[phone number]##61#*61#*#61#

Mobile (cell) phones

Forward serviceActivateCancel & deregisterCancel & retainStatusRe-establish
Unconditional: all calls*21*[phone number]###21##21#*21#*#21#
Conditional: if busy*67*[phone number]###67##67#*67#*#67#
Conditional: if not answered (see below for custom delay)*61*[phone number]###61##61#*61#*#61# (incl. time delay)
Conditional: if out of reach*62*[phone number]###62##62#*62#*#62#
All forwards*002*[phone number]###002##002#*002#*#002#
All conditional forwards*004*[phone number]###004##004#*004#*#004#

Registering a forwarding number

If the prefix to the forwarding command is ** (instead of the usual *), the phone number in that command is registered in the network. If the forwarding is later deactivated using a command with a single #, it can be re-activated with a simple * command without a phone number in it. The forwarding is then re-activated to the number registered in the network.

For example, if you use the out-of-reach code in a forwarding command:

**62*7035551212#

and then deactivate the forwarding:

#62#

you can later re-activate the out-of-reach forwarding without specifying a number:

*62#

After that command, all calls made to the phone while it is out of reach are forwarded to 7035551212.

It is also possible to activate the feature to a number other than the registered number, while still retaining the registered number for later use. For example:

*62*7185551212#

forwards calls to 7185551212 (and not to the registered number 7035551212). However, if you later issue:

*62#

the calls are again forwarded to the registered number 7035551212 (and not to the number from the previous forwarding command, 7185551212).

Forwarding delay

In GSM networks of some US carriers, and in all mobile networks in Europe, you can set a number of seconds for the phone to ring before the call is forwarded. Insert *SC*XX before the final # of the forwarding command, where SC is a service type code (11 for voice, 25 for data, 13 for fax) and XX is the number of seconds in increments of 5 seconds. If SC is omitted (just **XX), all service types are forwarded by default.

For example, forwarding on no-answer can be set with:

*61*[phone number]**[seconds]#

Forwarding voice calls only can be set with:

*61*[phone number]*11*[seconds]#

In some networks the delay is limited to thirty seconds (XX can only be 05, 10, 15, 20, 25 or 30). Greater values, like 45 and 60, cause the forwarding command to be rejected with an error message.

Back to Forward your business calls to your agent.

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