Cisco CP-7911G-CH1 Administration Guide - Page 244

How to Integrate Voice Mail with Cisco Unified SCCP and SIP SRST Integrating Voice Mail with Cisco Unified SRST Figure 3 How Voice-Mail Dial Sequence 1101#6000#2 Is Configured in Cisco Unified SCCP SRST call-manager-fallback voicemail 1101 1101 #6000#2 call-manager-fallback pattern ext-to-ext busy # cgn #2 pattern ext-to-ext busy # cdn #2 pattern ext-to-ext busy # fdn #2 pattern ext-to-ext no-answer # cgn #2 pattern ext-to-ext no-answer # cdn #2 pattern ext-to-ext no-answer # fdn #2 pattern trunk-to-ext busy # cgn #2 pattern trunk-to-ext busy # cdn #2 pattern trunk-to-ext busy # fdn #2 pattern trunk-to-ext no-answer # cgn #2 pattern trunk-to-ext no-answer # cdn #2 pattern trunk-to-ext no-answer # fdn #2 88978 The # cgn #2, # cdn #2, and # fdn #2 portions of the pattern commands shown in Figure 3 are DTMF 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 Figure 4, there are three types of tokens that correspond to three possible call states during voice-mail forwarding. Figure 4 How Numbers Are Extracted from Tokens (cgn=calling number) (fdn=forwarding number) (cdn=called number) IP ext. 1000 1000 calls 2000 IP ext. 2000 1000 is forwarded Cisco Unified Communications Manager ext. 3000 88979 pattern ext-to-ext busy # cdn # 2 = pattern ext-to-ext busy # 3000 # 2 pattern ext-to-ext busy # fdn # 2 = pattern ext-to-ext busy # 2000 # 2 pattern ext-to-ext busy # cgn # 2 = pattern ext-to-ext busy # 1000 # 2 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). 244 Cisco Unified SCCP and SIP SRST System Administrator Guide OL-13143-04