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New Member

VG 224 SCCP - problem with call transfer

Hi,

I configured VG 224 with sccp protocol.

Its working features like call forward all,Call pickup....etc.

But , Call Transfer and conference is not working .For these feature after i give hookflash i am not geting any tone anything...

any idea...

Thanks

Tom

5 REPLIES
Hall of Fame Super Red

Re: VG 224 SCCP - problem with call transfer

Hi Tom,

Transfer and Conference are two features that use Hookflash. You will probably need to tweak these settings;

Hookflash Duration

Analog phones use hookflash to access a second dial tone to initiate some of the SCCP phone features listed in Table 2, such as transfer and conference. Hookflash is an on-hook condition of short duration that is usually generated when a phone user presses the Flash button on a phone. The duration of an on-hook condition generated by a Flash button varies for different phone makes and models. Cisco voice gateways measure the duration of detected on-hook conditions to determine whether they should be interpreted as hookflash or not. The duration of a detected on-hook condition is interpreted by Cisco IOS software as follows:

An on-hook condition that lasts for a time period that falls inside the hookflash duration range is considered a hookflash.

An on-hook condition that lasts for a shorter period than the lower limit of the range is ignored.

An on-hook condition that lasts for a longer period than the higher limit of the range is considered a disconnect.

The hookflash duration range for FXS ports is defined as follows:

The lower limit of the range is set in software at 150 ms, although there is also a hardware-imposed lower limit that is typically about 20 ms, depending on platform type. An on-hook condition that lasts for a shorter time than this hardware-imposed lower limit is not reported to the Cisco IOS software.

The upper limit of the range is set in software at 1000 ms by default, although this value can be changed using the timing hookflash-input command in voice-port configuration mode on the voice gateway. The upper limit can be set to any value from 50 to 1550 ms.

The following examples demonstrate the use of the timing hookflash-input command to modify the upper limit of the hookflash duration range for FXS ports:

If the timing hookflash-input command is set to X, a value greater than 150, then any on-hook duration between 150 and X is interpreted as a hookflash. For example, if X is 1550, the hookflash duration range is 150 to 1550 ms. An on-hook signal that lasts for 1250 ms is interpreted as a hookflash, but an on-hook signal of 55 ms is ignored.

If the timing hookflash-input command is set to X, a value less than 150, then any on-hook duration between Y, the hardware lower limit, and X is interpreted as a hookflash. For example, if X is 65, the hookflash duration range is Y to 65 ms (assume Y is 20 ms). An on-hook signal that lasts for 1250 ms is interpreted as a disconnect, but an on-hook signal of 55 ms is interpreted as a hookflash. An on-hook signal of less than Y is ignored.

From this good doc;

http://www.cisco.com/en/US/products/ps6441/products_feature_guide09186a0080483a76.html#wp1128916

Hope this helps!

Rob

New Member

Re: VG 224 SCCP - problem with call transfer

Thanks for your info.

I have seen that in my analog phone , i can setup flash timing as 300,600,1000.

Could you please give me an example config for one port how i can change the timing according to the phone timin..like exampe if i set in the analog phone hook flash timing to 300

thanks in advance

New Member

Re: VG 224 SCCP - problem with call transfer

I tried different combinations in Gateway but its not working...

New Member

Re: VG 224 SCCP - problem with call transfer

Check the number of maximum calls on the Directory Number in Call Manager if 1 increase to 2.

Cisco Employee

Re: VG 224 SCCP - problem with call transfer

Hi John,

Nice post  . Now you are the master of Vg224 SCCP .

Hope that tac case help

Regards,

sumit

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