No extension specific OB rules other than the niece who has a set pre-dialcode. Yes the exact same number can be shown on the log failing on the 7960 and succeeding on the 942, will post in a minute.
From the Cisco phone...
SIP Phone> sh config
------ Current *FLASH* Configuration ------
Platform : Cisco Systems, Inc. IP Phone CP-7960G
Elapsed Time: 00:07:01
dhcp_server : 192.168.1.2
my_ip_addr : 192.168.1.222
subnet_mask : 255.255.255.0
defaultgw : 192.168.1.1
dyn_dns_addr_1 : 0.0.0.0
dyn_dns_addr_2 : 0.0.0.0
dns_addr : 192.168.1.2
primary_tftp_addr : 192.168.1.2
dyn_tftp_addr : 0.0.0.0
my_mac_addr : 001b:d40b:8ea9
domain_name : oriley.lan
my_name : SIP001BD40B8EA9
Status Flags : 12300000
image_version : "P0S3-08-9-00"
FirmLoadID : "PC030301"
DSPLoadID : ""
network_media_type : Auto
network_port2_type : Hub/Switch
dscpForAudio : 184
phone_label : "Glen_ORiley"
tftp_cfg_dir : ""
phone_password : **********
phone_prompt : "SIP Phone"
language : english
sntp_mode : DirectedBroadcast
sntp_server : ntp.on.net
time_zone : EAST
dst_offset : 1
dst_start_month : April
dst_start_day : 0
dst_start_day_of_week : Sun
dst_start_week_of_month : 1
dst_start_time : 02
dst_stop_month : Oct
dst_stop_day : 0
dst_stop_day_of_week : Sunday
dst_stop_week_of_month : 8
dst_stop_time : 2
dst_auto_adjust : 1
time_format_24hr : 1
date_format : D/M/Y
nat_enable : 0
nat_address :
voip_control_port : 5060
start_media_port : 16384
end_media_port : 32766
sync : "1"
xml_card_dir : ""
xml_card_file : "CARD.XML"
telnet_level : 1
services_url : ""
directory_url : ""
logo_url : ""
http_proxy_addr :
http_proxy_port : 80
garp_enable : 0
enable_vad : 0
dial_template : "dialplan"
callerid_blocking : 0
anonymous_call_block : 0
autocomplete : 1
messages_uri : "99"
dnd_control : 0
preferred_codec : g729a
dtmf_outofband : avt
dtmf_avt_payload : 96
dtmf_db_level : 5
dtmf_inband : 1
call_manager1_addr : "UNPROVISIONED"
call_manager2_addr : "UNPROVISIONED"
call_manager3_addr : "UNPROVISIONED"
call_manager1_sip_port : 5060
call_manager2_sip_port : 5060
call_manager3_sip_port : 5060
call_manager5_addr : "UNPROVISIONED"
call_manager5_sip_port : 5060
call_manager4_addr : "UNPROVISIONED"
call_manager4_sip_port : 0
line1_name : "21"
line2_name : "21"
line3_name : "21"
line4_name : "21"
line5_name : "UNPROVISIONED"
line6_name : "UNPROVISIONED"
line1_authname : "21"
line2_authname : "21"
line3_authname : "21"
line4_authname : "21"
line5_authname : "UNPROVISIONED"
line6_authname : "UNPROVISIONED"
line1_password : **********
line2_password : **********
line3_password : **********
line4_password : **********
line5_password : **********
line6_password : **********
line1_shortname : "21"
line2_shortname : "21"
line3_shortname : "21"
line4_shortname : "21"
line5_shortname : "UNPROVISIONED"
line6_shortname : "UNPROVISIONED"
line1_displayname : "21"
line2_displayname : "21"
line3_displayname : "21"
line4_displayname : "21"
line5_displayname : "UNPROVISIONED"
line6_displayname : "UNPROVISIONED"
line1_contact : "UNPROVISIONED"
line2_contact : "UNPROVISIONED"
line3_contact : "UNPROVISIONED"
line4_contact : "UNPROVISIONED"
line5_contact : "UNPROVISIONED"
line6_contact : "UNPROVISIONED"
proxy1_address : "192.168.1.2"
proxy2_address : "192.168.1.2"
proxy3_address : "192.168.1.2"
proxy4_address : "192.168.1.2"
proxy5_address : "UNPROVISIONED"
proxy6_address : "UNPROVISIONED"
proxy1_port : 5060
proxy2_port : 5060
proxy3_port : 5060
proxy4_port : 5060
proxy5_port : 5060
proxy6_port : 5060
sip_retx : 10
sip_invite_retx : 6
timer_t1 : 500
timer_t2 : 4000
timer_invite_expires : 180
timer_register_expires : 600
proxy_register : 1
proxy_backup : "UNPROVISIONED"
proxy_emergency : "UNPROVISIONED"
proxy_backup_port : 5060
proxy_emergency_port : 5060
outbound_proxy : UNPROVISIONED
outbound_proxy_port : 5060
nat_received_processing : 0
mwi_status : 0
call_waiting : 1
user_info : none
cnf_join_enable : 1
remote_party_id : 0
semi_attended_transfer : 1
transfer_onhook_enabled : 0
call_hold_ringback : 0
stutter_msg_waiting : 1
cfwd_url : ""
call_stats : 0
auto_answer : 0
speed_line2 : ""
speed_label2 : ""
speed_line3 : ""
speed_label3 : ""
speed_line4 : ""
speed_label4 : ""
speed_line5 : ""
speed_label5 : ""
speed_line6 : ""
speed_label6 : ""
local_cfwd_enable : 1
timer_register_delta : 5
sip_max_forwards : 70
rfc_2543_hold : 0
version_stamp : ""
timer_keepalive_expires : 120
connection_monitor_duration : 120
encrypt_key : **********
SIP Phone>
SIP Phone> sh network
------ Network *FLASH* Configuration ------
Platform : Cisco Systems, Inc. IP Phone CP-7960G
Elapsed Time: 00:14:18
dhcp_server : 192.168.1.2
my_ip_addr : 192.168.1.222
subnet_mask : 255.255.255.0
defaultgw : 192.168.1.1
dyn_dns_addr_1 : 0.0.0.0
dyn_dns_addr_2 : 0.0.0.0
dns_addr : 192.168.1.2
primary_tftp_addr : 192.168.1.2
dyn_tftp_addr : 0.0.0.0
my_mac_addr : 001b:d40b:8ea9
domain_name : oriley.lan
my_name : SIP001BD40B8EA9
Status Flags : 12300000
SIP Phone>
SIP Phone> sh dialplan
Dialplan is....
Dialplan version:
01. Pattern: 000 Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
02. Pattern: 2. Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
03. Pattern: 12.... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
04. Pattern: 13.... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
05. Pattern: 1300...... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
06. Pattern: 1800...... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
07. Pattern: 02........ Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
08. Pattern: 03........ Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
09. Pattern: 04........ Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
10. Pattern: 07........ Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
11. Pattern: 08........ Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
12. Pattern: 4....... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
13. Pattern: 5....... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
14. Pattern: 6....... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
15. Pattern: 7....... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
16. Pattern: 8....... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
17. Pattern: 9....... Rewrite: Line: All
Timeout: 0000 UserMode: Unspecified RouteMode: Default
18. Pattern: * Rewrite: Line: All
Timeout: 0006 UserMode: Unspecified RouteMode: Default
SIP Phone>
SIP Phone> sh register
LINE REGISTRATION TABLE
Proxy Registration: ENABLED, state: REGISTERED
line APR state timer expires proxy

ort
---- --- ------------- ---------- ---------- ----------------------------
1 111 REGISTERED 594 64 192.168.1.2:5060
2 111 REGISTERED 595 65 192.168.1.2:5060
3 111 REGISTERED 595 65 192.168.1.2:5060
4 111 REGISTERED 595 65 192.168.1.2:5060
5 ... NONE 0 0 undefined:0
6 ... NONE 0 0 undefined:0
1-BU .1x IDLE 0 0 undefined:0
Note: APR is Authenticated, Provisioned, Registered
SIP Phone>
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3CX logs next post