Cisco CP-7911G-CH1 System Administrator Manual page 244

How to Integrate Voice Mail with Cisco Unified SCCP and SIP SRST
Figure 3
call-manager-fallback
voicemail
The # cgn #2, # cdn #2, and # fdn #2 portions of the pattern commands shown in
digit patterns. These patterns are composed of tags and tokens. Tags are sets of characters representing
DTMF tones. Tokens consist of three command keywords (cgn, cdn, and fdn) that declare the state of
an incoming call transferred to voice mail.
A tag can be up to three character from the DTMF tone set (A to D, 0 to 9, # and *). Voice-mail systems
can use limited sets of DTMF tones. For example, Cisco Unity uses all DTMF tones but A to D. Tones
can be defined in multiple ways. For example, when the star (*) is placed in front of a token by itself, it
can mean "dial the following token number," or, if it is at the end of a token, it can mark the end of a
token number. If the asterisk is between other tag characters, it can mean dial *. The use of tags depends
on how DTMF tones are defined by your voice-mail system.
Tokens tell Cisco Unified SSCCP RST what telephone number in the call forwarding chain to use in the
pattern. As shown in
during voice-mail forwarding.
Figure 4
(cgn=calling number)
ext. 1000
pattern ext-to-ext busy #
pattern ext-to-ext busy #
pattern ext-to-ext busy #
Sets of tags and tokens or patterns activate a voice-mail system when one ofthe following occurs:
A user presses the message button on a phone (pattern direct command).
•
An internal extension attempts to connect to a busy extension and the call is forwarded to voice mail
•
(pattern ext-to-ext busy command).
An internal extension fails to connect to an extension and the call is forwarded to voice mail
•
(pattern ext-to-ext no-answer command).
An external trunk call reaches a busy extension and the call is forwarded to voice mail (pattern
•
trunk-to-ext busy command).
Cisco Unified SCCP and SIP SRST System Administrator Guide
244
How Voice-Mail Dial Sequence 1101#6000#2 Is Configured in Cisco Unified SCCP SRST
1101
1101 #6000#2
call-manager-fallback
pattern ext-to-ext busy
pattern ext-to-ext busy
pattern ext-to-ext busy
pattern ext-to-ext no-answer
pattern ext-to-ext no-answer
pattern ext-to-ext no-answer
pattern trunk-to-ext busy
pattern trunk-to-ext busy
pattern trunk-to-ext busy
pattern trunk-to-ext no-answer
pattern trunk-to-ext no-answer
pattern trunk-to-ext no-answer
Figure 4, there are three types of tokens that correspond to three possible call states
How Numbers Are Extracted from Tokens
(fdn=forwarding number)
1000 calls 2000
IP
cdn
fdn
cgn
Integrating Voice Mail with Cisco Unified SRST
# cgn #2
# cdn #2
# fdn #2
# cgn #2
# cdn #2
# fdn #2
# cgn #2
# cdn #2
# fdn #2
# cgn #2
# cdn #2
# fdn #2
1000 is forwarded
IP
ext. 2000
# 2 = pattern ext-to-ext busy #
# 2 = pattern ext-to-ext busy #
# 2 = pattern ext-to-ext busy #
Figure 3 are DTMF
(cdn=called number)
Cisco Unified
Communications
Manager
ext. 3000
3000 # 2
2000 # 2
1000 # 2
OL-13143-04