About gustavolsson

gustavolsson · 09-04-2014

Some of our retailers (ISP's in most cases) are experiencing huge issues with their customer's SPA112/SPA122's locking up due to malicious SIP traffic from outside. To mitigate these issues, the best solution for us would be the ability to put the wh...

gustavolsson · 09-04-2014

We have a scenario where certain SPA112/SPA122's are placed in a specific voice VLAN. For units in this VLAN, we want to change some provisioning parameters, such as SIP registrar, which is only available in the voice VLAN but not from the outside or...

gustavolsson · 08-10-2011

We have a scenario where we want the incoming calls with auto answer set to be routed to the headset, but paging calls (via multicast) should route to the speaker. Is there any way of acheiving this? If it's possible to specify output device to use f...

gustavolsson · 04-26-2011

...according to page 28 in the user guide here http://cisco.biz/en/US/docs/voice_ip_comm/csbpipp/ip_phones/user/guide/spa300-500-uc320w/SPA300-500-UC320W_UG_78-19372.pdf it's not supposed to be there. For the rest of the 50x-series and 9xx-series it'...

gustavolsson · 12-07-2010

Hi,I'm having some issues with displaying "exotic" characters in the phone display of the SPA525G2. For the SPA50x- and SPA9xx-series I set the charset http-header to "ISO-8859-1". Characters above unicode 0x7F are escaped to their unicode equivalent...

gustavolsson · 09-10-2014

Dan, In your experience, approximately how long is the delay when using TLS for SIP session? Trouble is we need to add a license to our SBC to enable TLS, if we're talking ~15second delay that solution is not feasible. But if we're talking a couple o...

gustavolsson · 09-08-2014

Hi Dan, thanks for sharing your knowledge.The provisioning manual reads "If the Open format profile contains multiple occurrences of the sameparameter tag, the last such occurrence overrides any earlier ones. To avoidinadvertently overriding configur...

gustavolsson · 09-08-2014

Thank you very much Dan for sharing your experiences, much appreciated!We have locked down the units as much as possible but the SIP DoS thing is still a problem. We'll give the port change a go and will try TLS also. The latter seem more like a real...

gustavolsson · 08-30-2012

Hi John,Did you find any solution to this? I have a customer who wants to use DHCP vendor specific option 43 (instead of CDP or LLDP-MED) for use in an already existing network environment with phones from other vendors. I'm not finding information a...

gustavolsson · 08-22-2011

Hi Alberto, any news on this? We've run into a related issue where the phone totally locks up if the first character in a field is an "exotic" character, compared to when it just does a bad interpretation if the character is present later in the sett...

Member Since	‎07-25-2008 04:38 AM
Date Last Visited	‎08-18-2017 03:56 AM
Posts	36

User Statistics

User Activity

Protecting SPA112/SPA122 from outside traffic

Methods for overriding configuration based on dhcp-option

Set auto answer device in SIP header

Lacking preferred audio device setting in SPA525G/G2

exotic characters in SPA525G/G2

Dan, In your experience,

Hi Dan, thanks for sharing

Thank you very much Dan for

SPA5xx DHCP VLAN tag

Re: exotic characters in SPA525G/G2