Table Of Contents
Configuring Voice
Prerequisites
Configuring the Voice Interface
Auto-Configuration on the Cisco VG202 and Cisco VG204 Voice Gateways
Restrictions for Configuring Auto-Configuration
Auto-Configuration With a DHCP Server
Auto-Configuration Without a DHCP Server
Configuring the Voice Interface for Cisco CallManager
Configuring the MAC Address Convention
Configuring Calls
Call Transfer
Call Waiting
Three-Party Conferencing
Call ID
Configuring Voice
This chapter explains how to configure voice interfaces and ports, which convert telephone voice signals for transmission over an IP network.
This chapter presents the following major topics:
•
Prerequisites
•Configuring the Voice Interface
VoIP enables your Cisco VG202 and Cisco VG204 voice gateways (VG) to carry live voice traffic (for example, telephone calls and faxes) over an IP network. VoIP offers the following benefits:
•Toll bypass
•Unified voice and data trunking
•Plain old telephone service (POTS)-Internet telephony gateways
For more information on understanding and configuring VoIP, see the Configuring Voice over IP document.
Prerequisites
Before you can configure your Cisco VG to use VoIP, you must first do the following:
•Establish a working IP network.
•Implement a dial plan, including the following tasks:
–Complete your company's dial plan. That is, decide what patterns of dialed numbers will access what telephony endpoints.
–Establish a working telephony network based on your company's dial plan.
–Integrate your dial plan and telephony network into your existing IP network topology.
Configuring the Voice Interface
Whenever you install a new interface or want to change the configuration of an existing interface, you must configure the interface.
Note The Cisco VG202 and Cisco VG204 voice gateways are fixed voice gateways and do not support interface cards.
Before you configure an interface, have the following information available:
•Protocols you plan to route on the new interface
•IP addresses, subnet masks, network numbers, zones, or other information related to the routing protocol
Timesaver Obtain this information from your system administrator or network plan before you begin configuring your Cisco VG.
To configure a voice interface, you must use configuration mode (manual configuration). In this mode, you can enter Cisco IOS commands through the command-line interface (CLI).
To configure the voice interface configuration mode, follow these steps:
Step 1 Connect a console to the Cisco VG. If you need instructions for connecting a console, see the installation chapter of your Cisco VG installation and configuration guide.
Step 2 Power on the Cisco VG. If the current configuration is no longer valid, after about one minute you see the following prompt:
Would you like to enter the initial dialog? [yes/no]:
Answer no. You now enter the normal operating mode of the Cisco VG.
Note If the current configuration is valid, you enter the normal operating mode automatically.
Step 3 After a few seconds, you see the user EXEC prompt (VG>). Type enable and the password to enter enable mode:
The prompt changes to the privileged EXEC (enable) prompt (VG#):
Step 4 Enter the configure terminal command to enter configuration mode:
The Cisco VG enters global configuration mode, indicated by the VG(config)# prompt.
Step 5 If you have not configured the Cisco VG before, or you want to change the configuration, use Cisco IOS commands to configure global parameters, passwords, network management, and routing protocols. In this example, IP routing is enabled:
For complete information about global configuration commands, see the Cisco IOS configuration guides and command references.
Step 6 To configure another interface, enter the exit command to return to the VG(config)# prompt.
Step 7 To configure the Cisco VG for voice traffic, see the VoIP references in the "Prerequisites" section.
Step 8 To exit configuration mode and return to the enable prompt, when you finish configuring interfaces, press Ctrl-Z. To see the current operating configuration, including any changes you just made, enter the show running-config command:
To see the configuration currently stored in NVRAM, enter the show startup-config command at the enable prompt:
Step 9 The results of the show running-config and show startup-config commands differ if you have made changes to the configuration but have not yet written them to NVRAM. To write your changes to NVRAM and make them permanent, enter the copy running-config startup-config command at the enable prompt:
VG# copy running-config startup-config
Building configuration. . .
The Cisco VG is now configured to boot in the new configuration.
Auto-Configuration on the Cisco VG202 and Cisco VG204 Voice Gateways
To configure auto-configuration on the Cisco VG202 and Cisco VG204 voice gateways, follow these guidelines and procedures:
•Restrictions for Configuring Auto-Configuration
•Auto-Configuration on the Cisco VG202 and Cisco VG204 Voice Gateways
•Configuring the Voice Interface for Cisco CallManager
•Configuring the MAC Address Convention
Restrictions for Configuring Auto-Configuration
The following restrictions apply to configuring auto-configuration on the Cisco VG202 and Cisco VG204 voice gateways before connecting them to the network:
•The Cisco Unified Communications Manager (CCM) needs to be provisioned with the voice gateway information.
Auto-Configuration With a DHCP Server
When the DHCP server is available, the voice gateway sends a DHCP server request to provide the IP address for the Fast Ethernet 0/0 interface, and the TFTP server's IP address using the DHCP option 150. When the DHCP server provides the information, the voice gateway provisions itself with the CCM configuration using Skinny Call Control Protocol (SCCP). Analog ports which have been pre-configured on CCM automatically register on CCM as SCCP controlled ports.
To provision the voice gateway with auto-configuration when a DHCP server is available, use the following commands.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface type slot/port
4. ip address dhcp
5. sccp local interface-type interface-number port port-number
6. ccm-manager sccp local interface-type interface-number
7. ccm-manager sccp
8. voice service voip
9. fax protocol t38 [nse[force]]
10. exit
DETAILED STEPS
| |
Command or Action
|
Purpose
|
Step 1
|
enable
Example:
VG# enable
|
Enters privileged EXEC mode.
|
Step 2
|
configure terminal
Example:
VG# configure terminal
|
Enters global configuration mode. You have entered global configuration mode when the prompt changes to VG(config)#.
|
Step 3
|
interface type slot/port
Example:
VG(config)# interface fastethernet 0/0
|
Enters interface configuration mode and specifies the type of interface you plan to configure. You have entered interface configuration mode when the prompt changes to VG(config-if)#.
|
Step 4
|
ip address dhcp
Example:
VG(config-if)# ip address dhcp
|
Acquires an IP address on an interface from the Dynamic Host Configuration Protocol (DHCP).
|
Step 5
|
sccp local interface-type interface-number port
port-type
Example:
VG(config)# sccp local fastethernet 0/0
|
Enables SCCP and its related applications (transcoding and conferencing).
|
Step 6
|
ccm-manager sccp local interface-type
interface-number
Example:
VG(config)# ccm-manager sccp local fastethernet
0/0
|
Selects the local interface that the SCCP application uses to register with Cisco CallManager.
|
Step 7
|
ccm-manager sccp
Example:
VG(config)# ccm-manager sccp
|
Enables Cisco CallManager autoconfiguration of the Cisco IOS gateway.
Note The ccm sccp command will remove itself if there is no IP address configured. The command checks every 20 seconds, up to a maximum of 8 times, then the IOS gateway will be automatically unconfigured.
|
Step 8
|
voice service voip
Example:
VG(config)# voice service voip
|
Enters voice-service configuration mode and specifies a voice-encapsulation type.
Note This step is not necessary through auto-configuration.
|
Step 9
|
fax protocol t38 [nse[force]]
Example:
VG(config)# fax protocol t38 nse force
|
Specifies the global default ITU-T T.38 standard fax protocol to be used for all VoIP dial peers.
Note This step is not necessary through auto-configuration.
|
Step 10
|
exit
Example:
VG(config-line)# exit
|
Exits to global configuration mode.
|
Auto-Configuration Without a DHCP Server
When the DHCP server is not available, use the following commands to provision the voice gateway with the CCM configuration.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface type slot/port
4. ip address static ip subnet mask
5. sccp local interface-type interface-number port port-number
6. voice service voip
7. fax protocol t38 [nse[force]]
8. ccm-manager sccp local interface-type interface-number
9. ccm-manager config server tftp_ip_address
10. ccm-manager sccp
11. exit
DETAILED STEPS
| |
Command or Action
|
Purpose
|
Step 1
|
enable
Example:
VG# enable
|
Enters privileged EXEC mode.
|
Step 2
|
configure terminal
Example:
VG# configure terminal
|
Enters global configuration mode. You have entered global configuration mode when the prompt changes to VG(config)#.
|
Step 3
|
interface type slot/port
Example:
VG(config)# interface fastethernet 0/0
|
Enters interface configuration mode and specifies the type of interface you plan to configure. You have entered interface configuration mode when the prompt changes to VG(config-if)#.
|
Step 4
|
ip address dhcp
Example:
VG(config-if)# ip address dhcp
|
Acquires an IP address on an interface from the Dynamic Host Configuration Protocol (DHCP).
|
Step 5
|
sccp local interface-type interface-number port
port-type
Example:
VG(config)# sccp local fastethernet 0/0
|
Enables the SCCP and its related applications (transcoding and conferencing).
|
Step 6
|
voice service voip
Example:
VG(config)# voice service voip
|
Enters voice-service configuration mode and specifies a voice-encapsulation type.
|
Step 7
|
fax protocol t38 [nse[force]]
Example:
VG(config)# fax protocol t38 nse force
|
Specifies the global default ITU-T T.38 standard fax protocol to be used for all VoIP dial peers.
|
Step 8
|
ccm-manager sccp local interface-type
interface-number
Example:
VG(config)# ccm-manager sccp local fastethernet
0/0
|
Selects the local interface that the SCCP application uses to register with Cisco CallManager.
|
Step 9
|
ccm-manager config server tftp_ip_address
Example:
VG(config)# ccm-manager config server tftp
9.13.38.245
|
Specifies the TFTP server from which the voice gateway downloads Cisco CallManager XML configuration files and enables the download of the configuration port port-number.
|
Step 10
|
ccm-manager sccp
Example:
VG(config)# ccm-manager C
|
Enables Cisco CallManager autoconfiguration of the Cisco IOS gateway.
|
Step 11
|
exit
Example:
VG(config-line)# exit
|
Exits to global configuration mode.
|
Configuring the Voice Interface for Cisco CallManager
To configure voice ports to a Cisco Unified Communications Manager server and set various parameters—including IP address, port number, and version number, use the following commands.
Note The following steps are required only when the voice interface is configured manually and not through auto-configuration.
SUMMARY STEPS
1. enable
2. configure terminal
3. stcapp ccm-group group-id
4. stcapp
5. stcapp feature access-code
6. stcapp feature speed-dial
7. voice-port slot-number/port
8. timeouts initial seconds
9. timeouts interdigit seconds
10. timeouts ringing seconds infinity
11. voice-port slot-number/port
12. ccm-manager fax protocol [protocol cisco]
13. ccm-manager config [server] ip-address name seconds
14. ccm-manager sccp local interface-type interface-number
15. ccm-manager sccp
16. sccp local interface-type interface-number port port-type
17. sccp
18. sccp ccm group group-number
19. associate ccm identifier-number priority priority-number
20. dial-peer voice tags pots
21. service stcapp
22. port port-number
23. exit
DETAILED STEPS
| |
Command or Action
|
Purpose
|
Step 1
|
enable
Example:
VG# enable
|
Enters privileged EXEC mode.
|
Step 2
|
configure terminal
Example:
VG# configure terminal
|
Enters global configuration mode. You have entered global configuration mode when the prompt changes to VG(config)#.
|
Step 3
|
stcapp ccm-group group-id
Example:
VG(config)# stcapp ccm-group 1
|
Configures the Cisco CallManager group number for use by the SCCP Telephony Control Application (STCAPP).
|
Step 4
|
stcapp
Example:
VG(config)# stcapp
|
Enables STCAPP.
|
Step 5
|
stcapp feature access-code
Example:
VG(config)# stcapp feature access-code
|
Enables STC application feature access codes and enters their configuration mode.
|
Step 6
|
stcapp feature speed-dial
Example:
VG(config)# stcapp feature speed-dial
|
Enables STC application feature speed-dial codes and enters their configuration mode.
|
Step 7
|
voice-port slot-number/port
Example:
VG(config)# voice-port 0/0
|
Enters voice-port configuration mode.
|
Step 8
|
timeouts initial seconds
Example:
VG(config-voiceport)# timeouts initial 60
|
Configures the initial digit timeout value for a specified voice port.
|
Step 9
|
timeouts interdigit seconds
Example:
VG(config)# timeouts interdigit 60
|
Configures the interdigit timeout value for a specified voice port.
|
Step 10
|
timeouts ringing seconds infinity
Example:
VG(config)# timeouts ringing infinity
|
Configures the timeout value for ringing.
|
Step 11
|
voice-port slot-number/port
Example:
VG(config)# voice-port 0/1
VG(config)# voice-port 0/2
VG(config)# voice-port 0/3
|
Enters voice-port configuration mode.
|
Step 12
|
ccm-manager fax protocol [protocol cisco]
Example:
VG(config)# ccm-manager fax protocol cisco
|
Enables fax-relay protocol for endpoints on a gateway.
|
Step 13
|
ccm-manager config [server] ip-address name
Example:
VG(config)# ccm-manager config server 9.13.38.245
|
Specifies the TFTP server from which the voice gateway downloads Cisco CallManager XML configuration files and enables the download of the configuration.
|
Step 14
|
ccm-manager sccp local interface-type
interface-number
Example:
VG(config)# ccm-manager sccp local fastethernet
0/0
|
Selects the local interface that the SCCP application uses to register with Cisco CallManager.
|
Step 15
|
ccm-manager sccp
Example:
VG(config)# ccm-manager sccp
|
Enables Cisco CallManager autoconfiguration of the Cisco IOS gateway.
|
Step 16
|
sccp local interface-type interface-number port
port-type
Example:
VG(config)# sccp local fastethernet 0/0
|
Selects the local interface that SCCP applications (transcoding and conferencing) use to register with Cisco CallManager.
|
Step 17
|
sccp
Example:
VG(config)# sccp
|
Enables SCCP protocol and its related applications (transcoding and conferencing).
|
Step 18
|
sccp ccm group group-number
Example:
VG(config)# sccp ccm group 1
|
Creates a Cisco CallManager group and enters SCCP Cisco CallManager configuration mode.
|
Step 19
|
associate ccm identifier-number priority
priority-number
Example:
VG(config)# associate ccm 1 priority 1
|
Associates a Cisco Unified CallManager with a Cisco CallManager group and establishes its priority within the group.
|
Step 20
|
dial-peer voice tag pots
Example:
VG(config)# dial-peer voice 999000 pots
|
Defines a particular dial peer, to specify the method of voice encapsulation, and to enter dial-peer configuration mode. Tag defines a particular dial peer. The tag range is from 1 to 2147483647. The POTS peer uses VoIP encapsulation on the IP backbone.
|
Step 21
|
service stcapp
Example:
VG(config)# service stcapp
|
Enables STC application feature service.
|
Step 22
|
port port-number
Example:
VG(config)# service stcapp
|
Configures the port number.
|
Step 23
|
exit
Example:
VG(config)# exit
|
Exits to global configuration mode.
|
Configuring the MAC Address Convention
The VG202 and VG204 voice gateways use the MAC address of the Skinny Call Control Protocol (SCCP) local interface to define unique MAC addresses for each voice port by using the last 9 digits of the SCCP local interface of the voice gateway.
For example, if the source interface MAC address is 000C.8639.5833, the MAC address of the voice port MAC address will be C863.9583.3XXX. In the preceding example, the last 9 digits of the SCCP of the local VG202 or VG204 voice gateway become the first 9 digits of the voice port MAC address after dropping the leading 000.
The last 3 digits of the voice port MAC address is the slot number (3-bit) + subunit number (2-bit) + port number (7-bit) in hexadecimal format. You combine the digits to get the last three MAC address digits.
For example, the voice-port 0/0 is slot number 0 (000): subunit 0 (00) and port number 0 (0000000). By stringing the digits together, you get the following: 0000 0000 0000 = 0 0 0. This means that if the source interface MAC address is 001f.cac3.b3f8, the MAC address of voice port 0/0 will be 1FCAC3b3f8000.
Table 4-1 shows the voice port to MAC address conversion table.
Table 4-1 Voice Port to MAC Address Conversion Chart
Port Number
|
Last Three Digits of the MAC Address
|
0/0
|
000
|
0/1
|
001
|
0/2
|
002
|
0/3
|
003
|
Configuring Calls
This section provides information and provisions for configuring calls on the VG202 and VG204 voice gateways. The following functions are covered:
•Call Transfer
•Call Waiting
•Three-Party Conferencing
•Call ID
Call Transfer
The VG202 or VG204 voice gateways blind-call transfer functionality allows the transfer of a call from the party you call to a destination caller without and call commit from the original person called. For example, party A (transferee) calls party B (transferor). The transferor wants to transfer the call to party C (transfer-target) and uses hookflash (softkey transfer) to get a dial tone, and then dials party C's number. When CCM gets party C's number, it transfers the party A call to party C without the need of committment from party B.
The VG202 or VG204 voice gateways consultation call transfer functionality allows happens after a call is established between a transferor and transferee. The transferor wants to transfer the call to a transfer target by using a softkey transfer by getting a dialtone then dialing the transfer-target's phone number. When the call between the transferor and transfer-target is established, the transferor hangs up the phone to commit the transfer. The CCM connects the call between the transferee and the transfer-target.
To configure call transfer on the voice gateways, use the following commands.
SUMMARY STEPS
1. enable
2. configure terminal
3. dial-peer voice tags pots
4. service stcapp
5. port port-number
6. exit
DETAILED STEPS
| |
Command or Action
|
Purpose
|
Step 1
|
enable
Example:
VG# enable
|
Enters privileged EXEC mode.
|
Step 2
|
configure terminal
Example:
VG# configure terminal
|
Enters global configuration mode. You have entered global configuration mode when the prompt changes to VG(config)#.
|
Step 3
|
dial-peer voice tag pots
Example:
VG(config)# dial-peer voice 1000 pots
VG(config)# dial-peer voice 1001 pots
VG(config)# dial-peer voice 1002 pots
|
Defines a particular dial peer, to specify the method of voice encapsulation, and to enter dial-peer configuration mode. Tag defines a particular dial peer. The tag range is from 1 to 2147483647. The POTS peer uses VoIP encapsulation on the IP backbone.
|
Step 4
|
service stcapp
Example:
VG(config)# service stcapp
|
Enables STC application feature service.
|
Step 5
|
port port-number
Example:
VG(config)# port 0/0
VG(config)# port 0/1
VG(config)# port 0/2
|
Configures the port number.
|
Step 6
|
exit
Example:
VG(config)# exit
|
Exits to global configuration mode.
|
Call Waiting
If a calling party places a call to another party and the other party is engaged in a call, and the called party has call waiting, the party receiving the call can suspend the current telephone call and switch to the incoming call. For example, when caller A is engaged in a call with Caller B, a second call coming in to caller A from caller C will cause caller A to hear the call-waiting tone (one tone with 300ms duration), which indicates a second call. Caller A should be able to use the softkey transfer button to answer the waiting call and then use softkey transfer to switch between the two calls.
To configure call waiting on the voice gateways, use the same commands and configuration shown in "Call Transfer" section.
Three-Party Conferencing
Three-party conferencing provides a three-way conversation between three call parties. The voice gateways along with CCM support three-party conferencing using Cisco IOS software to perform G.711 (ITU-T standard for audio companding) software mixing for up to three Real-time Transport Protocol (RTP) streams
To configure three-party conferencing on the voice gateways, use the same commands and configuration shown in "Call Transfer" section.
Call ID
Caller ID transmits a caller's number to the called party's telephone during the ringing signal. To configure caller ID on the voice gateways, use the following commands.
SUMMARY STEPS
1. enable
2. configure terminal
3. voice-port slot-number/port
4. caller-id enable [type [1|2]]
5. voice-port slot-number/port
6. caller-id enable [type [1|2]]
7. exit
DETAILED STEPS
| |
Command or Action
|
Purpose
|
Step 1
|
enable
Example:
VG# enable
|
Enters privileged EXEC mode.
|
Step 2
|
configure terminal
Example:
VG# configure terminal
|
Enters global configuration mode. You have entered global configuration mode when the prompt changes to VG(config)#.
|
Step 3
|
voice-port slot-number/port
Example:
VG(config)# voice-port 0/0
|
Enters voice-port configuration mode.
|
Step 4
|
caller-id enable [type [1|2]]
Example:
VG(config-voice-port)# caller-id enable type 1
|
Allows the sending or receiving of caller-ID information.
|
Step 5
|
voice-port slot-number/port
Example:
VG(config)# voice-port 0/1
|
Enters voice-port configuration mode.
|
Step 6
|
caller-id enable [type [1|2]]
Example:
VG(config-voice-port)# caller-id enable type 2
|
Allows the sending or receiving of caller-ID information.
|
Step 7
|
exit
Example:
VG(config)# exit
|
Exits to global configuration mode.
|
