So you are filtering calls based on Calling number and your MGCP gateway is blocking incoming calls with no CLID?
Refer to Step 7 here: https://supportforums.cisco.com/document/71966/blocking-calls-based-calling-party-id
7) Some calls may arrive without caller id or a restricted caller ID. If you wish to allow calls without caller ID, there will also need to be a <none> or blank Translation Pattern. If the administrator does not define a <none> Translation Pattern, then all calls without caller id will be rejected.
If you have a different issue please explain in bit more detail.
I have the exact same problem. Calls coming with "anonymous" (seen in CDRs) are dropped by the filter, although I have the "blank" pattern. Did you find a solution?
These "anonymous" calls started when I added new voice gateways ISR 4400 series as SIP Trunks. It seems the new IOS changed the way the SIP headers are sent to the CUCM.
With SIP I have had similar problems as well. Personally I wiped out the "From" Header and put in a fictitious number that I would then take actions on once it makes it to CUCM. Do this with a SIP profile on a CUBE dial peer. It sure beats writing a normalization script for CUCM to do the same thing.
For instance:
voice class sip-profiles 1
request INVITE sip-header From modify "<sip:Anonymous@" "<sip:0000000000@"
I'm also having problems with anonymous callers when using a filter list on CUCM. If the CLID is known, calls pass thru, but if an anonymous callers calls, the call gets dropped. Did you find a workaround?
You need to apply a Normalization Script on the SIP Trunk which will modify the SIP Header and change ANONYMOUS / NONE / NULL to a "Replacement Number" which will be routable by CUCM. Please find the SIP Trunk Normalization Script details below.
Name: Allow-Anonymous-Calls Description:ALLOW ANONYMOUS / NONE / NULL INBOUND CALLS - Change the SIP invite from sip:Anonymous to sip:0 so that calls match the inbound call filter list
Conetent:
M={}
--change to trace.enable() to have trace output in SDI trace.disable()
function M.inbound_INVITE(msg) --capture inbound INVITE messages --set the string to replace the anonymous, unavailable or restricted strings in the INVITE message replacementNumber = "sip\:0" trace.format("Replacement Number: %s", replacementNumber)
--Set the header values to inspect for anonymous caller local fields = { "From" , "Remote-Party-ID" , "P-Preferred-Identity", "P-Asserted-Identity" } local numberOfFields = #fields trace.format("Fields/Count: %s, %s, %s, %s, %s", fields[1], fields[2], fields[3], fields[4], numberOfFields)
--loop though the header fields to inspect and replace any instance of 'anonymous' with the specified replacement number local x = 1 while x <= numberOfFields do
--get the field from the header local header = msg:getHeader(fields[x]) if header == nil then trace.format("Field %s not found", fields[x]) else trace.format("Field %s: %s", fields[x], header)
--does the from contain anonymous if string.find(string.lower(header), "sip\:anonymous") then trace.format("Found string anonymous in %s", fields[x]) trace.format("Header: %s %s", fields[x], string.lower(header))
--replace the word anonymous with the user defined replacement number local newHeader = string.gsub(string.lower(header), "sip\:anonymous", replacementNumber) trace.format("New %s Field: %s", fields[x], newHeader)
--modify the From field msg:modifyHeader(fields[x], newHeader) else if string.find(string.lower(header), "sip\:unavailable") then trace.format("Found string unavailable in %s", fields[x]) trace.format("Header: %s %s", fields[x], string.lower(header))
--replace the word unavailable with the user defined replacement numbe local newHeader = string.gsub(string.lower(header), "sip\:unavailable", replacementNumber) trace.format("New %s Field: %s", fields[x], newHeader)
--modify the From field msg:modifyHeader(fields[x], newHeader)
else if string.find(string.lower(header), "sip\:restricted") then trace.format("Found string unavailable in %s", fields[x]) trace.format("Header: %s %s", fields[x], string.lower(header))
--replace the word unavailable with the user defined replacement number local newHeader = string.gsub(string.lower(header), "sip\:restricted", replacementNumber) trace.format("New %s Field: %s", fields[x], newHeader)
--modify the From field msg:modifyHeader(fields[x], newHeader)
else trace.format("Field %s number valid. No change made.", fields[x]) end end end end x = x+1 end end return M
: Message Rollback Only
Disable Script
Memory Threshold: 50
LUA Instruction Threshold: 1500
Once creating the SIP Normalization Script in CUCM under Device > Device Settings > SIP Normalization Script, apply the script to the SIP Trunk after hours. Ensure to Apply Config & Reset the SIP Trunk (NOTE: This will drop active calls). I have tested this in multiple deployments and verified it works.
voice class sip-profiles 10 request ANY sip-header From modify "<sip:anonymous@" "<sip:+00000000000@"
exit
here you must start see that the SIP messages header is changed to +00000000000 not anonymous, you have the option to change (+00000000000) to anything that meet your requirement
Regards,
Ahmad Kefaya
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