190183092-IPT-Day1-21

2003, Cisco Systems, Inc. All rights reserved. 2001, Cisco Systems, Inc. IPT Bootcamp Day 2 Page 1

IPT Bootcamp Day 1

Call Manager CIPT

2001, Cisco Systems, Inc. All rights reserved. 2

Telephony Class of Service

2003, Cisco Systems, Inc. All rights reserved. IPT Bootcamp Day 2 Page 3

General Definition

PSTN

V IP WAN

Employee

Long Distance

International

Class of

Service 1

Lobby

Class of

Service 2

Employee

Class of

Service 3

Executive

Executive

III


Subnet/ Partition

B

Subnet/ Partition

C

Subnet/ Partition

D

Subnet/ Partition

A

Access List/

Calling Search Space

permit B permit C (implicit) deny D

Partitions/ Calling Search Spaces: Analogy with Subnets/ Access Lists

Partition Where you are

Collects devices with similar reachability characteristics

Items placed in partitions: Directory Numbers (DN), Route Patterns, Voice Mail Ports...

Calling Search Space Where you may call

Set of rules to set call restrictions/ permissions

Defines which partitions a device may search to reach a dialed number

Is assigned to IP phones, GWs


Partitions and Calling Search Spaces Analogy

Rita Dave

972 813 5000

SWB Dallas Yellow Pages

Dave 972 813 5000

Rita wants to call Dave

Dave lists his number

In a directory

To do so, she needs to

know Daves number

II



Rita Dave

972 813 5000


Dave 972 813 5000

To look up numbers, Rita

looks through the

directories she owns

If she doesnt have the right directory

SWB Dallas White Pages

Outlook Address Book

Little Black Book

she cant place the call

Ritas list of directories

III



Rita Dave

972 813 5000


Dave 972 813 5000

But if she has the

directory Dave has

listed his number in



Little Black Book

Ritas list of directories

the call will go through



III



Rita Dave

972 813 5000


Dave 972 813 5000



Little Black Book

Ritas list of directories The directory in which Daves number is listed is his numbers partition

The list of directories in

which Rita looks up numbers

is her calling search space

II


Partition Definition

A logical grouping of patterns.

All patterns in a partition are equally reachable.

Assigned to Directory Numbers and Route Patterns

Partition

Lobby

LobbyPT

Partition

Employee

EmployeePT

Partition

Executive

ExecutivePT

Partition

Gateway

Local and WAN

GatewayPT

Directory Numbers

63500

63501

63502

63503

Directory Numbers

64050

64051

64052

6405X

Directory Numbers

64020

64021

64022

6402X

Route Pattern

9.@

9.8@

5.7XXXX


Partition Configuration

Assigned to Directory Numbers, Route Patterns, Translation Patterns


Calling Search Space Definition

An ordered list of partitions.

Digit analysis looks through the callers calling search space (list of partitions) when searching for the closest match for the callers dialed number.

Assigned to Devices, Phones and Gateways, and Translation Patterns.

Lobby Phone Employee Phone Executive Phone Local and WAN

GWPT


E911PT

EmployeePT


E911PT

EmployeePT

LocalGWPT

WANGWPT


E911PT

EmployeePT

GWPT

ExecutivePT


E911

EmployeePT


Calling Search Space Configuration

Assigned to Devices (Phones, Gateways, etc.) and Translation Patterns


Problems Addressed

Routing by geographical location

Routing by tenant

Routing by class of user


Geographical Location: Multi-site with Centralized Call Processing

PHL

PSTN

PHL

PSTN

PHLInternal

PHLAllCalls

NYCInternal

NYCAllCalls

On_Cluster

All IP Phones

PHL911 911

9.911

PHLPSTN 9.[2-9]XXXXXX

9.1[2-9]XX[2-9]XXXXXXX

9.011!

9.011!#

PSTN

Calling

Search

Space

assigned

to IP Phone

based on

policy

Calling Search Spaces Partitions

Route Lists

Route Groups Devices

Route

Patterns

PHL

Phones

NYC

Phones

NYC911 911

9.911

NYCPSTN 9.[2-9]XXXXXX

9.1[2-9]XX[2-9]XXXXXXX

9.011!

9.011!#

NYC

PSTN

NYC

PSTN PSTN

PHL

Gateways

NYC

Gateways


Single Site Multi-tenant Per-tenant Partitions/Calling Search Spaces

Tenant 1 Tenant 2

Voice

Mail

CallManager Cluster

PSTN

Tenant N

...

Tenant1

Tenant1_Internal

Tenant1_Local

Tenant1_National

Tenant1_International

Tenant2

Tenant2_Internal

Tenant2_Local

Tenant2_National

Tenant2_International

TenantN

TenantN_Internal

TenantN_Local

TenantN_National

TenantN_International

Partitions

Calling

Search

Spaces

...

2001, Cisco Systems, Inc. All rights reserved. 16

Troubleshooting Routing Problems


Route Pattern

Overlapping Dial Plan

If you dial 911Wait 15 Seconds

If you dial 911Route Call Immediately

911

9.1XXXXXXXXXX

911

9.1[2-9]XX[2-9]XXXXXX


Second Dial Tone

Second

Dial Tone

Route Pattern

92XX

9.[2-9]XX XXXX

9.[2-9]XX[2-9]XX XXXX

No

Yes

Yes

Users dial string:

CallManager actions:

>

Play dial tone

92106527977 timeout>

Break dial tone

Wait

92106527977 timeout>

Wait

92106527977 timeout> 92106527977 timeout> 92106527977 timeout>

92XX

9.[2-9]XX XXXX

9.[2-9]XX[2-9]XX XXXX

No

Yes

Yes Play second dial

tone

92106527977 timeout>

92XX

9.[2-9]XX XXXX

9.[2-9]XX[2-9]XX XXXX

No

Yes

Yes Route call

VII


Second Dial Tone (cont.)

Second

Dial Tone

Route Pattern

92

92.[2-9]XX XXXX

92.[2-9]XX[2-9]XX XXXX

No

Yes

Yes

Users dial string:

CallManager actions:

timeout>

Play dial tone

9timeout>

Break dial tone

Wait

92meout>

Wait

923meout>

Play second dial tone

92

92.[2-9]XX XXXX

92.[2-9]XX[2-9]XX XXXX

No

Yes

Yes

9231meout>

Break second dial tone

Wait

923125551212meout>

Route call

92

92.[2-9]XX XXXX

92.[2-9]XX[2-9]XX XXXX

No

Yes

Yes

VI


One Way Calling

Partition A

1211

Partition B

1234

Call Me

Back OK

1211

1234

1234

CSS B

1211

CSS B, A

X

Reorder

tone

I


Discard Digits Assignments

PSTN Dial Plan 9101022014085551212

9101022014085551212 Discard: Predot 1010 dialing

9.1010XXX1[2-9]XX[2-9]XX XXXX

PSTN Dial Plan

14085551212 Discard: Predot

91010XXX.1[2-9]XX[2-9]XX XXXX

Gateway

Gateway

9101022014085551212

Only None and Predot can be used with route patterns that do not contain the @.

If using H323 gateway, verify the digits CM sends matches the proper dial-peer.


Troubleshooting inbound calls (H323)

PSTN Dial Plan

1. What digits are passed from the PSTN and is it matching the correct

dial-peer?

debug isdn q931 (if PRI), and debug voip ccapi inout. Check for translation rules used on the gateway.

csim start from the gateway to see if it rings the IP phone.

2. Look at detailed CCM traces to see if CM is seeing the digits from the

GW.

Check the calling search space for the gateway. Does it have access to the proper partition?

3. Check overlapping dial plans. Are we matching a translation pattern?

Check the route plan report.

4. What is the state of the phone we are trying to call? Is it registered?


Troubleshooting outbound calls

PSTN Dial Plan

1. Look at detailed CCM traces to see if CM is matching the correct route

pattern. Check the calling search space for the phone. Does it have access to the proper

partition?

2. Check overlapping dial plans. Are we matching a translation pattern?

Check the route plan report.

3. Look in CCM traces. Does CM find the right gateway?

4. What digits are passed from CM and is it matching the correct dial-peer? Digit discard instructions may be incorrectly set, debug isdn q931 (if PRI), and debug

voip ccapi inout to see if the GW is receiving proper digits and matching dial-peers correctly. Check to see what digits are stripped on the pots dial-peer; may need to prefix.

csim start from the gateway to see if it rings the PSTN phone.

5. Check the telco circuit. If it is FXO, connect a pots phone and attempt the call. If PRI, use the show isdn status

command to check for layer 1 and 2. If T1-CAS, check physical layer and look for alarms.


Remote Call Drops Immediately

G.729 G.723

Phone A 7960

Phone B

X Y WAN(FR)

X

H.323/Inter-Cluster Trunk

SCCP

Phone C 30VIP

Phone D

SCCP

Codec mismatch

Documents

190183092-IPT-Day1-21