Administrator’s Guide for SIP-T2_Series_T4_Series IP Phones 
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account.X.busy_fwd.on_code 
String within 32 characters 
Description: 
Configures the busy forward on code to activate the server-side busy forward 
feature for account X when the call forward mode is configured as Custom. The IP 
phone will send the busy forward on code and the pre-configured destination 
number to the server when you activate busy forward feature for account X on the IP 
phone. 
X ranges from 1 to 16 (for SIP-T48G/T46G/T29G). 
X ranges from 1 to 12 (for SIP-T42G). 
X ranges from 1 to 6 (for SIP-T41P/T27P). 
X ranges from 1 to 3 (for SIP-T23P/G). 
X ranges from 1 to 2 (for SIP-T21(P) E2). 
Example: 
account.1.busy_fwd.on_code = *74 
Web User Interface: 
Features->Forward& DND->Forward->No Answer Forward->On Code 
Phone User Interface: 
Menu->Features->Call Forward->Busy Forward->On Code 
account.X.busy_fwd.off_code 
String within 32 characters 
Description: 
Configures the busy forward off code to deactivate the server-side busy forward 
feature for account X when the call forward mode is configured as Custom. The IP 
phone will send the busy forward off code to the server when you deactivate busy 
forward feature for account X on the IP phone. 
X ranges from 1 to 16 (for SIP-T48G/T46G/T29G). 
X ranges from 1 to 12 (for SIP-T42G). 
X ranges from 1 to 6 (for SIP-T41P/T27P). 
X ranges from 1 to 3 (for SIP-T23P/G). 
X ranges from 1 to 2 (for SIP-T21(P) E2). 
Example: 
account.1.busy_fwd.off_code = *75 
Web User Interface: 
Features->Forward& DND->Forward->No Answer Forward->Off Code 
Phone User Interface: