Cisco Unified Communications Manager Express (CME) - Based on cisco iOS™, this ATS is an integrated solution for processing and managing telephone connections in Cisco IP telephony for a small office or offline remote office.
CME Preparatory Setting
The Cisco CallManager Express preparatory setting is to update the router's software, with the aim of adding an XML configuration to the phone. In the current article we will use Cisco phones 78XX series.
This series of phones is officially supported on iOS 15.4(1)T software and above. If, for any reason, you can't upgrade to the current version of iOS, you should create registration profiles yourself. These settings are presented in Table 1.
| Модель IP Phone | Recommended configuration |
|---|---|
| 7821 | voice register pool-type 7821 xml-config maxNumCalls 6 xml-config busyTrigger 6 xml-config custom sshAccess 0 num-lines 2 description Cisco IP Phone 7821 reference-pooltype 6921 |
| 7841 | voice register pool-type 7841 xml-config maxNumCalls 6 xml-config busyTrigger 6 xml-config custom sshAccess 0 num-lines 4 description Cisco IP Phone 7841 reference-pooltype 6941 |
| 7861 | voice register pool-type 7861 xml-config maxNumCalls 6 xml-config busyTrigger 6 xml-config custom sshAccess 0 num-lines 16 description Cisco IP Phone 7861 reference-pooltype 6961 |
Set up DHCP
A zero point is the setting up of a dhcp server on the router, as almost all phones are set up to receive an IP address in this way by default. An example of the configuration is below.
CME#conf t
CME#(config)ip dhcp pool Voice
CME#(config-ip-dhcp)network 172.17.5.0 255.255.255.0
CME#(config-ip-dhcp)default-router 172.17.5.1
CME#(config-ip-dhcp)option 150 ip 172.17.5.1
CME#(config-ip-dhcp)exitDescription:
ip dhcp pool is the creation of a DHCP server.
the network is the definition of the subnet from which addresses will be issued.
default-router is the default gateway address.
option 150 IP Address- 150 option transmits in DHCP settings, tftp server address.
Set up the codecs you use
A description of the class of codecsthat will be available for selecting SIP subscribers when agreed in the appropriate order.
CME#conf t
CME#(config)voice class codec 1
CME#(config-voice)codec preference 1 g711alaw
CME#(config-voice)codec preference 2 g711ulaw
CME#(config-voice)codec preference 3 g729br8Description:
Voice class codec is the creation of a class of codecs.
codec preference is the priority of codec use.
SET up VOIP encapsulation (Voice over IP)
This paragraph describes the setting between the different endpoints, namely the resolution of all types of calls.
CME#(config)voice service voip
CME#(config-voice)allow-connections h323 to h323
CME#(config-voice)allow-connections h323 to sip
CME#(config-voice)allow-connections sip to h323
CME#(config-voice)allow-connections sip to sip
CME#(config-voice)sip
CME#(conf-serv-sip)bind control source-interface FastEthernet0/0
CME#(conf-serv-sip)bind media source-interface FastEthernet0/0
CME#(conf-serv-sip)registrar server
CME#(conf-serv-sip)#registrar server expires max 600 min 60Description:
voice service voip - log in to set up the interaction between calls.
allow-connections h323 to h323 - Resolution of calls such as H.323 on H.323.
allow-connections sip to h323 - Sip call resolution on H.323.
allow-connections sip to sip - Allowing SIP-type calls on SIP.
sip - Log in to SIP setting mode
Bind control source-interface FastEthernet0/0 - set the interface for labeling alarm packets.
bind media source-interface FastEthernet0/0 - set the interface for labeling packages with voice.
registrar server expires max 600 min 60 - set the minimum time before re-registration IP phones. This is to ensure that after the CME reboot, it automatically re-registers IP phones, because when rebooted, CME does not retain a database of registered IP phones.
Turning on support sip phones
All settings regarding the SIP protocol take place in the voice register global section.
CME#(config)voice register global
CME#(conf-voi-serv)source-address 172.17.5.1 port 5060
CME#(conf-voi-serv)max-dn 10
CME#(conf-voi-serv)max-pool 5
CME#(conf-voi-serv)load 7821 sip78xx.11-5-1SR1-1
CME#(conf-voi-serv)timezone 34
CME#(conf-voi-serv)time-format 24
CME#(conf-voi-serv)date-format D/M/YDescription:
voice register global - includes support for SIP phones
mode cme - CME mode
source-address 172.17.5.1 port 5060 - IP address for registration
max-dn 10 - maximum number of subscriber numbers
max-pool 5 - maximum number of phones
load 7821 sip78xx.11-5-1SR1-1 - SIP firmware for Cisco 7821 phone
timezone 34 - Moscow time of 240 minutes
time-format 24 - Time format 24 hours
date-format D/M/Y - Date date format/month/year
Creating a line for the subscriber
An example of the subscriber line configuration is below.
CME#(config)voice register dn 1
CME#(config-voice-register-dn)number 102
CME#(config-voice-register-dn)name Travolta John
CME#(config-voice-register-dn)label Travolta JohnDescription:
voice register dn 1 - creating a subscriber data block(dn)
number 102 - subscriber number
name Travolta John - the name displayed on the phone screen
Determining SIP customers
An example of the configuration to determine the SIP subscriber is below.
CME#(config)voice register pool 1
CME(config-register-pool)#id mac 0023.0434.5BE9
CME(config-register-pool)#type 7821
CME(config-register-pool)#number 1 dn 1
CME(config-register-pool)#voice-class codec 1
CME(config-register-pool)#username 102 password 102Description:
voice register pool 1 - data for customer registration Cisco 7821
i'r mac is a Cisco mac address.
Type 7821 is a type of phone for time zone, date format, etc.
number 1 dn 1 - We use Line 1 on the first line.
voice-class codec 1 - we use a list of codecs.
username 2001 password cisco - account.
