Hello Ricardo,
there a two ways to monitor Cisco IP-Phones (7940,7941,7945, 7960,
7961, 7965, 7911, 7971 .....)
1. Asking the CallManager by SNMP.
You have to activate the CDR / CMR recording, then try a snmp-walk
We didn't test this way. But we found hints in the net.
Actually we tested the CISCO-CCM-MIB for inventory-purpose.
Please keep in mind that you have to activate a (Cisco-)SNMP-
Server in the web-interface of the callmanager in addition to the
running linux-SNMP-Server.
2. Asking the devices directly.
You are right - this can be done by a TCP-Probe, only.
You have to collect your information from the different
(HTTP-)status pages of the phone.
We did a lot of tests but finally gave up.
There is no way to implement a single TCP-Probe for all devices.
The variables are:
- language
- kind of device
- software-version
With this variables the HTML-code changes,
You will get several
- HTTP-Page-Names
- Descriptor-names
- Delimiters
To define regular-expressions fitting for all cases is nearly
impossible.
You can try to write 4 different TCP-Probes
but only if you are sure about
- the amount of only 4 different kinds of devices
- that nobody will switch the language,
- the device will not be updated.
The variables for call-quality are
... Jitter (avg/max)
... MOS LQK (avg/min/max)
... Latency
From the HTTP-Page you will get the summary of the last completed
call. So the Min / Max gives you additional information of the best
and worst part of the call
If you need more detailed information you have to use a sniffer
or Cisco-Service-Monitor-Appliance (sold with the CUOM).
If you are interested in our Test-TCP-Probes please feel free to
contact us.
Regards to Hongkong
from Berlin
Uli
Am 18.02.2009 um 06:17 schrieb Ricardo Siu:
Has anyone used InterMapper to monitor Cisco VoIP phones, model #
7911,
7960, 7971 and 7921? These phones do not look like they have SNMP
support. As a result I am thinking of writing a custom TCP probe to
grab
useful data. Another question is what are some useful data that is
highly correlated to call quality?
If anyone can share their experience with these VoIP phone it is
greatly
appreciated.
Thanks,
Ricardo Siu
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