Call is connecting but phone is not ringing CCIE Voice LAB setup

Call is connecting but phone is not ringing CCIE Voice LAB setup

I was trying to build the CCIE Voice lab for practice and learn Cisco Voice .I configured T1 connection from HQ site to PSTN T1 with tree channels .HQ site I had to configure HQ site MGCP with using three channels .I configured the MGCP on T1 line and it was registered in CUCM. I  configured T1 line channels manually because i wanted to use 3 channels . as soon as i was applying the registering on cucm it was making it 24 channels . but T1 channels was up and multiple frame was established .when i was calling from HQ site to PSTN phone On the phone call was showing connected but PSTN phone was not ringing. I did the mistake on my PSTN router I did not configured following parameter. so it was not ringing my phone .

dial-peer voice 1 pots
incoming called-number .
direct-inward-dial

Below was the my configuration on HQ site and PSTN site .

Continue reading Call is connecting but phone is not ringing CCIE Voice LAB setup

How to test call from Cisco IOS command

How to test call from Cisco IOS command

If you want to test call from CISCO Router IOS command line to check your DN or dial-peer is working .

just enter the command and its a hidden command .

Router#csim start  “number you want to call

For Example if you want to test a destination number  9839422 enter the command as below.

Router#csim start 9839422

 

 

Cisco CME SIP extension as X-lite Phone

Cisco CME SIP extension as X-lite Phone

1- Allows SIP phones to call other SIP phones and H323 calls

voice service voip
allow-connections sip to sip
allow-connections sip to H323
allow-connections H323 to sip
allow-connections H323 to H323

2- Enable IOS SIP Registrar

sip
registrar server expires max 1200 min 300

3- configure the voice register configuration The “voice register global” configuration is similar to the telephony-service configurations used for SCCP phones.

Continue reading Cisco CME SIP extension as X-lite Phone

Cisco CME and ephone Button Command attribues

Cisco CME and ephone Button Command attributes

:           Normal Ring
b         Call waiting Beep No ring
f          Feature Ring
m         Monitor mode
o          Overlay Line no call waiting
c          Overlay Line with call waiting
x          Overlay expansion /Roll over
s          Silent Ring
w         Watch mode

Button Number  (Attribute ) Directory Number

For Example if we have to configure one line when call comes there are silent ring on button no 2  and ephone-dn 10

#button  2 s 10

 

How to configure cisco router as NTP server

How to configure cisco router as NTP server

1- you have to obtain public NTP server addresses from www.ntp.org
2-  configure you router with NTP server IP

GK_RTR#configure terminal
GK_RTR(config)#ntp server 64.209.210.20
GK_RTR(config)#clock timezone ARIZONA -7

3- Verifying NTP Configurations

GK_RTR#show ntp associations
GK_RTR#show clock

4- After you configure the Cisco router to synchronize with an NTP server, you can configure it to provide date and time information to a CUCM server and other devices,

To allow other devices (such as a CUCM server) to pull date and time information from a Cisco router using NTP, use the ntp master <stratum number> command from global configuration mode.
For example,

Entering ntp master 4 instructs the Cisco router to deliver date and
time information to requesting clients, marking it with a stratum number of 4.

 

Cisco Router as DHCP Server

Cisco Router as DHCP Server

Using a Cisco router as a DHCP server is a somewhat common practice in smaller networks.In this example we have two VLANs one for Voice and one for DATA.

DATA VLAN  IP  Nework Range  172.16.1.0  Gateway IP 172.16.1.1  DNS Server  10.31.144.1
Voice VLAN  IP  Nework Range  172.16.2.0  Gateway IP 172.16.2.1  DNS Server  10.31.144.1
TFTP Server for Cisco Phones 172.16.2.1

GK_RTR#configure terminal
GK_RTR(config)#ip dhcp excluded-address 172.16.1.1 172.16.1.9
GK_RTR(config)#ip dhcp excluded-address 172.16.2.1 172.16.2.9
GK_RTR(config)#ip dhcp pool DATA_SCOPE
GK_RTR(dhcp-config)#network 172.16.1.0 255.255.255.0
GK_RTR(dhcp-config)#default-router 172.16.1.1
GK_RTR(dhcp-config)#dns-server 10.31.144.1
GK_RTR(dhcp-config)#exit
GK_RTR(config)#ip dhcp pool VOICE_SCOPE
GK_RTR(dhcp-config)#network 172.16.2.0 255.255.255.0
GK_RTR(dhcp-config)#default-router 172.16.2.1
GK_RTR(dhcp-config)#option 150 ip 172.16.2.1
GK_RTR(dhcp-config)#dns-server 10.31.144.1

If you are using Windows server or some other centralized device for DHCP services. Even Cisco Unified Communications Manager includes DHCP server capabilities. you need to configure ip helper-address <central DHCP server IP address> to your VLAN interface to forward DHCP requests to the central DHCP server for the voice and Data VLANs.

How to calculate PVDM requirement for Cisco IP Telephony

How to calculate PVDM requirement for Cisco IP Telephony
DSP (Digital Signal Processors) is a chip that performs all the sampling, encoding, and compression functions on audio coming into your router .DSPs typically come in chips to install in your Cisco router that look like old memory  SIMMs.

Cisco bundles these DSP chips into Packet Voice DSP modules (PVDM)pvdm

Cisco provides a DSP calculator that provides the number of DSP chips you need to
purchase based on the voice network you are supporting. This tool can be found at

www.cisco.com/web/applicat/dsprecal/index.html        Note :- require CCO login

pvdmcal

How to configure T1/E1 controller on Cisco 2800 router

How to configure T1/E1 controller on Cisco 2800 router

1- check physical location of card slot  to check run command

# sh diag

it will show you WIC slot no

WIC Slot 0:
VWIC2-1MFT-T1/E1 – 1-Port RJ-48 Multiflex Trunk – T1/E1
Hardware Revision : 0.0

2- initialize the E1 T1 controller card

PSTN(config)#card type ?
e1 E1
t1 T1

PSTN(config)#card type e1 ?
<0-2> Card slot number (always 0 for 1800 series & 2801 routers)

PSTN(config)#card type e1 ?
<0-2> Card slot number (always 0 for 1800 series & 2801 routers)

PSTN(config)#card type e1 0 ?
<0-3> WIC slot number (0:WIC, 1:Onboard for NM-HDV2)

PSTN(config)#card type e1 0 0 ?
<cr>

Continue reading How to configure T1/E1 controller on Cisco 2800 router

ISDN T1 E1 Troubleshooting TEI_ASSIGNED

ISDN  T1 E1 Troubleshooting TEI_ASSIGNED

ISDN Status as TEI_ASSIGNED meaning

Which indicates that the PRI does not exchange Layer 2 frames with the Telco switch. Use the show controller e1 x command to first check the controller t1 circuit, and verify whether it is error free before troubleshooting ISDN Layer 2 problem with the debug isdn q921 command.

Symptoms :- ISDN layer 1 is active and Layer 2 going up and down with error      “TEI_ASSIGNED”

There could be following missing command under signaling interface at Telco end if they are using Cisco Gateway.

isdn protocol-emulate network

interface Serial0/0/0:15
no ip address
encapsulation hdlc
isdn switch-type primary-net5
isdn protocol-emulate network
isdn incoming-voice voice
no cdp enable

Cisco trouble shooting guides

E1 Troubleshooting      Troubleshooting flowchart E1 Troubleshooting Flow chart T1

CCIE Voice Evolves to CCIE Collaboration

During this 10th anniversary year of the CCIE Voice certification, Cisco is pleased to announce the next generation of Expert-level IT skills training and assessment for telecom, unified communications, and video staff. CCIE Voice is evolving to become CCIE Collaboration, reflecting advances in networked collaboration solutions beyond simple audio phone calls. The new CCIE Collaboration certification will expand to include Cisco’s leading solutions for voice, video, IM, presence, and call centers. The CCIE Voice certification will be retired as of February 14, 2014. Continue reading CCIE Voice Evolves to CCIE Collaboration