PandaeatsBamboo - A Tech Sharing Blog

UCM + CUE integration example step-by-step

2012-02-09T03:55:00.001+08:00

1. Create CUE End User on CUE

conf t

username boss create

username sec create

username boss phonenumber 1001

username sec phonenumber 1002

exit

username boss pin 12345

username sec pin 12345

2. Config JTAPI subsystem on CUE

ccn subsystem jtapi

ctiport 1111 1112 1113 1114

ccm-manager address 192.168.20.2 192.168.20.1

ccm-manager username panda password eatsbamboo

end subsystem

3. Config JTAPI number on CUE

ccn trigger jtapi phonenumber 1110

application voicemail

enabled

maxsessions 4

end trigger

3. Create voice mailbox on CUE

voicemail mailbox owner boss

enable

voicemail mailbox owner sec

enable

4. Create UCM End User boss and sec on UCM

5. Create Voicemail Pilot 1110 on UCM

6. Create Voicemail Profile on UCM

7. Assign Voicemail Profile to DN of boss and sec

8. Create CTI Route Point 1110, same DN as voicemail pilot

9. Create CTI ports 1111, 1112, 1113 and 1114

10. Create application users panda and assign CTI route point and ports to it

Note: No MWI number is needed to create on UCM and CUE

UCM - Transfer On-hook

2012-02-09T03:47:00.001+08:00

By default, when you are doing a call transfer on UCM, you will press the Transfer softkey on phone to talk to the destination callee, the press the Transfer softkey to complete the transfer.

There is a system parameter in UCM that can change this behavior:
System > Service Parameter > Transfer On-hook Enabled = True

After making the change, when you do a transfer call, after pressing the Transfer softkey, you can put the phone on hook to complete the transfer.

Quick Note about MOH for UCM

2012-02-09T03:36:00.001+08:00

Holder (the one who press hold) - determines which audio source file to play
Holdee (the one that is being held) - determines which media resource will play that file (MRGL)

User on Hold audio source - Normal IP phone calls
Network on Hold audio source - call transfer, call park, conference - application-based hold

CLID name and number blocking on H323 gateway

2012-02-09T03:24:00.001+08:00

You can block the CLID name or number on outbound VoIP calls from a dial-peer:

dial-peer voice 911 pots
clid strip name ! Block CLID name

dial-peer voice 10 pots
clid strip ! Block CLID number

Basic MGCP router configuration using ccm-manager config server command

2012-02-09T03:14:00.001+08:00

After configuring UCM MGCP configuration, on router you can config the MGCP feature with ease. There is a feature called "ccm-manager config server" which configs the MGCP gateway automatically, by pulling configuration file from UCM as well as automatically config the router controller, voice-port and serial interfaces. The basic settings that you need are as follows:

mgcp bind control source-interface gi0/0
mgcp bind media source-interface gi0/0
ccm-manager config server 192.168.20.2 192.168.20.1 ! UCM IP addresses, you can specify sub as primary and pub as backup
ccm-manager config server

Then you can see the console messages showing the ISDN interface and other MGCP features are configured automatically.

Do a "show ccm-manager" and "show isdn status" to verify if it is configured properly. If not, check out this post:
http://pandaeatsbamboo.blogspot.com/2012/02/isdn-shows-teiassigned-status-on-mgcp.html

If you make any changes that is different from the UCM configuration (e.g. config a partial T1 instead of using all channels), remember to no ccm-manager config server otherwise your configuration will be override after reloading the router

ISDN shows TEI_ASSIGNED status on MGCP gateway

2012-02-09T03:04:00.004+08:00

My environment: IOS 12.4(23)T3 advanced enterprise, 2821

When I try to config the MGCP using the ccm-manager config server, in "show ccm-manager" it shows the gateway is registered to UCM successfully:

Priority Status Host

============================================================

Primary Registered 192.168.20.2

First Backup Backup Ready 192.168.20.1

Second Backup None

However when I do "show isdn status", the Layer 2 status shows:

State = TEI_ASSIGNED

A router reload solved the problem, you should see

State = MULTIPLE_FRAME_ESTABLISHED

in "show isdn status" Layer 2 status.

Gatekeeper Zone Prefix and Tech Prefix

2012-02-09T02:58:00.001+08:00

- Zone Prefix determines the routing TO a ZONE

- Tech Prefix determines the routing TO a GATEWAY within a ZONE

Preventing CME ephone-dn registering to H323 gatekeeper

2012-02-09T02:54:00.000+08:00

If your CME also function as the H323 gateway that registers to gatekeeper, and you don't want the CME DN register to the H323 gatekeeper, you can either:

1. Disable it globally
telephony-service
max-dn 20 no-reg

Or

2. Display per ephone-dn
ephone-dn 1
number 1234 no-reg both

Allow sending calling name to PSTN

2012-02-09T02:50:00.002+08:00

To display calling name:

interface serial0/0/0:15
isdn outgoing display-ie

This display name is the "name" config in ephone-dn or voice register dn in CME

ephone-dn 1
name panda ! this is the calling name

ISDN B-channel selection algorithm

2012-02-09T02:46:00.001+08:00

The default behavior is in descending order (e.g. 15 -> 14 -> 13). To change this behavior:

interface serial0/0/0:15
isdn bchan-number-order ascending ! i.e. 1 -> 2 -> 3

Basic Gatekeeper Security using zone subnet command

2012-02-09T02:39:00.001+08:00

By default any gateway can register with gatekeeper, and you can specify the subnet or hosts which are allowed to register to gatekeeper
gatekeeper
no zone subnet PANDA-GK default enable
zone subnet PANDA-GK 192.168.20.0/24 enable

Useful Gatekeeper debug command on Cisco IOS

2012-02-09T02:37:00.000+08:00

Hidden
- debug gatekeeper main 10
- debug gatekeeper call 10

RAS
- debug ras
- debug h225 asn1

Gatekeeper CAC Example

2012-02-09T02:34:00.001+08:00

Say for example we want to allow only 3 calls
gatekeeper
endpoint resource-threshold ! enable the max-calls command
arj reject-resource low ! allows endpoint to reject the limit of ARQ when the endpoint reaches its max no of calls
endpoint max-calls h323id gk_ucm_2 3 ! allow up to 3 calls

UCM - Find Phone Type via CLI SQL statement

2012-02-09T02:20:00.001+08:00

To find the phone type that is supported on UCM, one of the way is to run the following SQL statement on UCM CLI:

run sql select * from typemodel where name like '%7975%'

For newer phones that are not found in the UCM database, QED definition file is required to install in order to show up in UCM

Changing Phone Header Bar Display

2012-02-09T02:15:00.000+08:00

To change the Phone Header Bar Display (top right hand corner of the phone):
CME (SCCP)
ephone-dn 1
number 1234
desc +442056781234

CME (SIP)
voice register pool 1 ! Not in voice register dn
number 1 dn 1
description +442056781234

CM
Change the DN External Phone Number Mask

Disable CME ephone auto-registration

2012-02-09T02:08:00.001+08:00

The default behavior for CME is to allow phone auto registration. When the phone with correct tftp configured, the phone will be registered to CME without a ephone-dn.

To disable this behavior:
telephony-service
no auto-reg-ephone

Using SIP as UCM Auto-registration Protocol

2012-02-09T02:02:00.001+08:00

By default, when you turn on auto-registration on UCM, SCCP is the protocol used for the phone. You can change it to SIP by modifying the Enterprise Parameter on UCM:
System > Enterprise Parameter > Auto Registration Phone Protocol

Then enable auto-registration from System > Cisco Unified CM

Specifies the Starting and End Directory Number, as well as uncheck the auto-registration disabled checkbox.

Quick Note on H323 and MGCP call preservation

2012-02-05T00:34:00.000+08:00

A quick summary on H323 and MGCP gateway call preservation behavior when it works with UCM:

MGCP (primary UCM dies)

PSTN <-- MGCP GW --> UCM <--> Phone

- enabled by default

- UCM dies, call preserved

- Call continues over the gateway

- supplementary services will not work

- new calls to MGCP gateway will not work until MGCP gateway re-registers with the backup UCM

H323 (primary UCM dies)

PSTN <-- H323 GW --> UCM <--> Phone

- Default has no call preservation

- configure with "call preserve" command

- will immediately begin to use backup UCM for supplementary service, outbound and inbound call routing

Branch voice gateway (WAN link down)

- SRST kicks in

- If MGCP, then MGCP fallback - fallback to H323 / SIP processing

- MGCP - Call drop immediately at the branch router

- H323 is recommended for branch router - call preservation feature after IOS 12.4(9T)

Call preservation is configured in the gateway with the following command syntax:

Router(config)#voice service voip
Router(conf-voi-serv)#h323
Router(conf-serv-h323)#call preserve

MGCP fallback is configured with the following command syntax:

Router(config)#ccm-manager fallback-mgcp
Router(config)#application
Router(config-app)#global

Router(config-app-global)#service alternate Default

Automated Alternate Routing (AAR)

2012-02-05T00:21:00.001+08:00

In the previous example, RSVP-based CAC is discussed:
http://pandaeatsbamboo.blogspot.com/2012/02/rsvp-based-call-admission-control.html
In "Not Enough Bandwidth" scenario, you can enable AAR to kick in so that the call will be automatically rerouted to the PSTN instead of the congested WAN.

1. Firstly enable the service parameter to turn on AAR.

2. Create partition and CSS for AAR.

3. Create AAR Group. Add Dial Prefix if necessary.

4. Apply AAR CSS and AAR Group to Device Pool, and assign AAR Group to DN. If you don't input anything in the AAR destination mask, the destination phone external phone number mask will be used.

5. Create the AAR route pattern with AAR partition to route the call

Reduce the location bandwidth and give it a try~

RSVP-based Call Admission Control

2012-02-03T20:04:00.001+08:00

The previous blogpost discussed about the bandwidth calculation for each of the CAC method:
http://pandaeatsbamboo.blogspot.com/2012/02/call-admission-control-bandwidth.html
In this blogpost we will go a bit more details on how to get it implemented.
RSVP bandwidth calculation is based on the worst case scenario. For a G.729 call, it is 40Kbps and for G.711, it is 96Kbps. However it will not based on worst case scenario for every call, it is only used for the first call. Say for example if I want to implement RSVP-based CAC to 4 x G.729 call, it should be calculated as:
40Kbps + 24Kbps + 24Kbps + 24Kbps = 112Kbps
Okay, then the next step is the router configuration.

1. Create the MTP dspfarm profile with RSVP enabled

sccp local GigabitEthernet0/0

sccp ccm 192.168.20.20 identifier 1 version 7.0

sccp

sccp ccm group 1

associate ccm 1 priority 1

associate profile 2 register R1-MTP

dspfarm profile 2 mtp

codec pass-through

codec g729r8

rsvp

maximum sessions software 10

associate application SCCP

interface Serial0/1/0:0

no ip address

encapsulation frame-relay

fair-queue 64 256 47

frame-relay lmi-type ansi

ip rsvp bandwidth

interface Serial0/1/0:0.2 point-to-point

bandwidth 768

ip address 192.168.21.1 255.255.255.0

ip ospf mtu-ignore

snmp trap link-status

frame-relay interface-dlci 202

ip rsvp bandwidth 112

2. Create the MTP entry on UCM, add it to MRG and add the MRG to MRGL. Assign the MRGL to the device pool / phone.

3. Create Locations, mark the two locations relation as RSVP "Mandatory".

4. Make calls from between the 2 sites, do a "show ip rsvp reservation"

R1#sh ip rsvp reservation

To From Pro DPort Sport Next Hop I/F Fi Serv BPS

192.168.22.254 192.168.24.254 UDP 18176 16670 none none FF LOAD 24K

192.168.24.254 192.168.22.254 UDP 16670 18176 192.168.21.2 Se0/1/0: FF LOAD 24K

Since the ip rsvp bandwidth is 112Kbps, you are allowed to make up to 4 G.729 calls and when you try to make the 5th call, you will see the message "Not Enough Bandwidth" on the phone.

Using your MacBook as wireless access point

2012-02-03T04:07:00.001+08:00

I am using a MBP and I don't want to setup a permanent wireless access point at home for some reason, so the easiest way for me to create a home wireless network occasionally is to using my MBP to share my wired connection with wifi.

To do it, first go to System Preferences, choose Sharing:

Then turn on the Internet Sharing. Share your connection from: "Ethernet", and To computers using "Wifi"

Your wireless icon on the top menu bar should change to:

You can optionally config security for your wireless network, however only WEP is supported :(

My current OS Version when I write this post: OS X Lion 10.7.3

Call Admission Control - Bandwidth Allocation

2012-02-03T03:48:00.001+08:00

A quick summary table on how much bandwidth used in the CAC calculation for 1 call in different codecs

	G.711	G.729
Gatekeeper CAC	128Kbps	16Kbps
Location CAC	80Kbps	24Kbps
RSVP CAC	96Kbps	40Kbps

Mobile Voice Access + Mobile Connect - Step by Step

2012-02-03T03:25:00.001+08:00

To configure Mobile Voice Access + Mobile Connect:

1. Make sure the MVA service is started on UCM

2. Media Resource > Mobile Voice Access - to configure your MVA number, in my case my number is 3000

3. Change the Service Parameter > Cisco CallManager

4. Config your H323 gateway, where 192.168.20.20 is your UCM address in my case

application

service mva http://192.168.20.20:8080/ccmivr/pages/IVRMainpage.vxml

dial-peer voice 3000 pots

service mva

incoming called-number 3000

no digit-strip

direct-inward-dial

dial-peer voice 3001 voip

destination-pattern 3000

session target ipv4:192.168.20.20

dtmf-relay h245-alphanumeric

codec g711ulaw

no vad

5. Configure the CCM End User for MVA access

Also make sure that it is added to the appropriate User Group

6. Associate the user to the device, as well as the DN. Also change the device "owner ID" to that user.

7. Create Remote Destination Profile + Remote Destination. Make sure that the rerouting CSS can reach the route pattern for Mobile Connect. Associate the DN on RDP to the user.

8. On the phone, add the mobile connect phone button

Test it by calling from PSTN to the MVA number. If the PSTN number matches (partial match according to the above config) with your remote destination number, you are only required to enter the PIN without the key in the remote destination number when you call the MVA number. Also try Mobile connect and make sure the re-routing CSS can reach the remote destination number.
Good luck!

Assigning Static IP address via Cisco IOS DHCP

2012-02-03T02:12:00.000+08:00

For some cases that you want to assign a static IP address via a Cisco IOS DHCP server, to make sure for that particular MAC address will always get the same IP address, here is the example on how to get it done:

ip dhcp pool PandaPhone
host 192.168.20.10 255.255.255.0
client-identifier 01ee.ffaa.bbcc.dd
default-router 192.168.20.254
option 150 ip 192.168.20.200

Assuming the MAC address of the phone is EEFF.AABB.CCDD

Save energy with Energywise

2012-02-03T02:02:00.001+08:00

I am using a 3560-8PC PoE switch in my home lab and in order to save my electric bill, energywise has been implemented on the switchport in order to turn off the PoE power in the hours that I don't need it.

Example: To turn on the PoE power every morning at 8am and turn off at 10pm.

interface FastEthernet0/7

energywise level 10 recurrence importance 100 at 0 8 * * *
energywise level 0 recurrence importance 100 at 0 22 * * *

Also I have written a web page to override this behavior, by triggering the expect script on my Linux box, details can be referred by this old post:
http://pandaeatsbamboo.blogspot.com/2009/12/script-to-turn-off-poe-power-using.html