SRST Compatibility for Different Phone Loads.

[Joey De Wiele]

Is there some way to determine SRST compatibility with different phone loads? For example, I can see that SRST 8.0 works fine with SCCP45.8-5-3S but when I try  the default 9.1.2 phone load SCCP45.9-3-1SR2-1S I see that SRST 8.0 doesn't work so well. Is there somewhere I can look up a phone load and see what versions of SRST that load is compatible with?

Thanks,

Joey

[V.Naveen Kumar]

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cusrst/requirements/guide/srs80spc.html

Check this matrix

[Joey De Wiele]

Thanks for the reply.

Unfortunately that document shows me a single load that's compatible with SRST version 8.0. What I need is a document that says "for this phone load here are all the compatible versions of SRST".

[Jaime Valencia]

There's no such doc, it's unrealistic to expect testing for every single FW release, Vs. Every single SRST versions.

[vhilario]

Java is right but there´s a bug on firmware 9.x that is affecting SRST on V.8, That´s why I was asking for the IOS version of the router.

Take a look of this bug CSCte08121   as well as this link

https://supportforums.cisco.com/discussion/11172581/srst-terminals-register-no-ephone-dn-sccp-firmware-higher-84

[Joey De Wiele]

Thanks for that link, it was useful.

It seems from above that if I'm upgrading CUCM, particularly for a "big jump", like 7.1.3 to 9.1.2:

1. It's "unreasonable" for me to ask what SRST versions are compatible with the new phone loads. I'm OK with this I guess.
2. Unless I'm using one of the few explicitly supported combinations of SRST and phone loads that I better test things first.

[Aman Soi]

Hi,

thanks for sharing the bug[+5]

regds,

aman

[vhilario]

What´s your router´s IOS version?