Hi Michael,
Most voicemail systems use the "Originally Dialed Number" CLID for mailbox
selection when calls reach via the phone forwarding. So you may be good to go here
For CUE;
**Mailbox selection (OCN or LRD) in your case use OCN
This configurable option specifies the mailbox to be used in case of call forward.
Mailbox selection: Mailbox in which an incoming voice message is stored. The options are original called number (OCN) or the last redirected number (LRD). LRD is the default option:)
Check out Page 88 of this good doc;
http://www.cisco.com/en/US/docs/voice_ip_comm/unity_exp/rel2_3/cliadmin/cuecli23.pdf
Unity Connection 7.x and above;
Via
Cisco Unity Connection Administration
Advanced (towards the bottom of the page)
Conversation Configuration
Use Last (Rather than First) Redirecting Number for Routing Incoming Call
Unity 5.x and above you can config Unity to use the "Last Redirecting Number" on a Call Forward instead of the "Originally Dialed Number"
Route Forwarded Calls by the First or Last Redirecting Number
Cisco Unity supports the option of routing calls based on either the first or last redirecting number when a call is forwarded to Cisco Unity.
Note the following:
This option requires Cisco Unity-CM TSP 8.1(2) or later.
This option is not supported by integrations through PIMG units.
This option can be changed through the Advanced Settings Tool (AST), which is available in Tools Depot.
And as an FYI - only...
Multiple Calls Per Line
#
Cisco Unified CME 9.0 provides support for the Multiple Calls Per Line (MCPL) feature on Cisco Unified 6921, 6941, 6945, and 6961 SIP IP phones and Cisco Unified 8941 and 8945 SCCP and SIP IP phones.
#
Before Cisco Unified CME 9.0, the maximum number of calls supported for every directory number (DN) on Cisco Unified 8941 and 8945 SCCP IP phones was restricted to two.
#
With Cisco Unified CME 9.0, the MCPL feature overcomes the limitation on the maximum number of calls per line.
#
In Cisco Unified CME 9.0, the MCPL feature is not supported on Cisco Unified 6921, 6941, 6945, and 6961 SCCP IP phones.
Cisco Unified 6921, 6941, 6945, 6961, 8941, and 8945 SIP IP Phones
#
In Cisco Unified CME 9.0, the default values for the busy-trigger-per-button command is 1 for the Cisco Unified 6921, 6941, 6945, and 6961 SIP IP phones and 2 for the Cisco Unified 8941 and 8945 SIP IP phones.
#
You can configure the maximum number of calls before a phone receives a busy tone. For example, if you configure busy-trigger-per-button 2 in voice register pool configuration mode for a Cisco Unified 6921, 6941, 6945, or 6961 SIP IP phone, the third incoming call to the phone receives a busy tone.
http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/admin/configuration/guide/cmebasic.html#wp1240634
Cheers!
Rob
"Far away from your trouble and worry
You belong somewhere you feel free" - Tom Petty
