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CME, non Cisco SIP phones call transfer restrict

Question from a Facebook reader at

Using 2851 router with CME:
System image file is "flash:c2800nm-advipservicesk9-mz.124-15.T9.bin"
Version 4.1(0)
Cisco Unified Communications Manager Express

I have few Cisco 7912 skinny and few non Cisco SIP phones. One of the 7912 is configured with multiple lines on it and it used like receptionist phone for incoming calls. Some SIP phones don t have access to E1 , other have . For those SIP phones with access to E1 I want to restrict ability for transfer to E1 trunk, they should have only local/…./ transfer. Only 7912 receptionist phone should have ability to transfer to E1.
So in final configuration any SIP or 7912 without access to E1 trunk should make call to receptionist and he ll transfer to E1.
I put under telephony-service
Transfer-pattern .T
For 7912 phones with access to E1 I make template with command:
transfer max-length 4
This is working fine, but I can not find similar command for non Cisco SIP phones.
/SIP phones config/

voice register global
mode cme 
source-address port 5060
max-dn 10
max-pool 10
authenticate register
voice register dn 1
number 6471
name 6471
voice register dn 2
number 6473
name 6473
voice register dn 3
number 6376
name 6376
voice register pool 1
id mac 0009.4553.99DC
number 1 dn 1
cor incoming CSS2 default
codec g711ulaw
voice register pool 2
id mac 0009.4553.9A26
number 1 dn 2
cor incoming CSS2 default
codec g711ulaw
voice register pool 3
id mac 0009.4553.9A82
number 1 dn 3
cor incoming CSS2 default
codec g711ulaw


voice service voip 
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
supplementary-service h450.12
no supplementary-service sip refer
subscription maximum accept 5
registrar server expires max 600 min 60

max-ephones 30
max-dn 110
ip source-address port 2000
max-conferences 16 gain -6
transfer-system full-consult
transfer-pattern .T
fac standard
ephone-template 2
transfer max-length 4

/Cisco 7912 config/

ephone-dn 8 dual-line
number 6477
name 6477
corlist incoming CSS2

ephone 5 
device-security-mode none
mac-address 0019.55EC.A818
ephone-template 2
type 7912
button 1:8

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Re: CME, non Cisco SIP phones call transfer restrict

Since it appears that you are a Cisco employee, I would recommkend that you look for an answer by using numerous internal resources available to you.

That will avoid giving the impression that your best support is free public forum mainly intended for customers.

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