# \[Hilo\] How to disable the URC of CALL?

**URL:** https://forum.sierrawireless.com/t/hilo-how-to-disable-the-urc-of-call/6607
**Category:** HL Series FAQ
**Created:** [July 24, 2013, 6:03am UTC](https://forum.sierrawireless.com/t/hilo-how-to-disable-the-urc-of-call/6607 "2013-07-24T06:03:01Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![FAQ\_Poster](https://avatars.discourse-cdn.com/v4/letter/f/f9ae1b/32.png) [@FAQ\_Poster](https://forum.sierrawireless.com/u/FAQ_Poster)
#### Post date: [July 24, 2013, 6:03am UTC](https://forum.sierrawireless.com/t/hilo-how-to-disable-the-urc-of-call/6607/1 "2013-07-24T06:03:01Z")

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Answer: If you want to disable URC of a data/voice call, you can set \<AT_PSCHRU =510\>. For example:  
AT_PSCHRU=510 —To disable the URC for a data/voice call  
OK  
ATA —Answer the voice call  
OK

You can set \< AT\*PSCHRU = \> to forbid other URC display. Here’re the details:  
: used to filter URCs  
0: Disable all URC  
1 (CALL related URC): RING, CRIGN, CCWA, CLIP, COLP, CSSI, and CSSU  
2 (SMS related URC): CMT, CMTI, CDS  
4 (CBM related URC): CBM  
8 (CIEV related URC): CIEV  
16 (Network related URC): CREG, CGREG  
32 (SS related URC): CUSD  
64 (INIT related URC): PSREADY  
128 (DBG related URC): PSDBG  
511: By default, all the URC is enabled