Cisco TELEPRESENCE ISDN GATEWAYS 2.0 Reference guide

Cisco TelePresence
ISDN Gateways
Version 2.0
Online help (printable format)
D14659.02
December 2010

Contents
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Contents
Logging into the web interface............................................................................................ 7
Failing to log into the web interface.................................................................................... 8
Invalid passwords....................................................................................................................................8
Getting started with the ISDN gateway................................................................................ 9
Making calls with the ISDN gateway.................................................................................. 11
ISDN to IP calls.....................................................................................................................................11
IP to ISDN calls.....................................................................................................................................11
Using the auto attendant.................................................................................................... 12
Using the Far End Camera Control .................................................................................................12
Using the ISDN gateway for voice-only calls..................................................................... 13
Configuring the ISDN gateway as a voice-only gateway.........................................................................13
Dial plan configuration ...........................................................................................................................14
Calling a PSTN telephone from an MCU.........................................................................................14
Displaying ISDN port utilization......................................................................................... 15
Displaying the ISDN calls list............................................................................................. 16
Disconnecting and deleting calls............................................................................................................16
Diagnostic controls................................................................................................................................16
Displaying detailed call information .................................................................................. 17
Understanding the dial plan............................................................................................... 19
Rules.....................................................................................................................................................19
Using rules............................................................................................................................................20
Rule ordering.........................................................................................................................................20
Displaying and testing the dial plan .................................................................................. 21
Displaying the rules list..........................................................................................................................21
Modifying the rules list...........................................................................................................................23
Testing the dial plan ..............................................................................................................................23
Adding dial plan rules........................................................................................................ 24
Adding and updating dial plan rules.................................................................................. 25
Adding dial plan rules ............................................................................................................................25
Updating dial plan rules.........................................................................................................................28
Adding and updating dial plan rules in leased line mode ................................................. 29

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Adding dial plan rules ............................................................................................................................29
Updating dial plan rules.........................................................................................................................32
Example dial plan rules...................................................................................................... 33
Allocating bandwidth using rules for IP to ISDNcalls..............................................................................33
Allocating bandwidth using rules for ISDN to IP calls..............................................................................34
Forwarding ISDN calls to an operator or a conference ...........................................................................34
Specifying voice-only IP to ISDN telephone calls ...................................................................................35
Setting up dial plan rules when using TCS-4..........................................................................................36
ISDN to IP calls ..............................................................................................................................36
IP > ISDN > ISDN > IP calls............................................................................................................37
Dial plan examples in leased line mode .................................................................................................38
ISDN to IP dial plan (leased line mode)...........................................................................................38
IP to ISDN dial plan (leased line mode)...........................................................................................39
Dial plan syntax ................................................................................................................. 40
Syntax for conditions (Called number matches).....................................................................................40
Syntax for actions (Call this number)......................................................................................................41
Displaying the built-in gatekeeper registration list............................................................ 42
Configuring the built-in gatekeeper ........................................................................................................42
Configuring neighboring gatekeepers..............................................................................................42
Gatekeeper status.................................................................................................................................44
ID view ...........................................................................................................................................44
Registration view ............................................................................................................................45
Displaying the user list...................................................................................................... 46
Adding and updating users ............................................................................................... 47
Adding a user........................................................................................................................................47
Updating a user.....................................................................................................................................47
Updating your user profile................................................................................................. 50
Changing your password................................................................................................... 51
Configuring network settings............................................................................................ 52
IP configuration settings.........................................................................................................................52
IP status................................................................................................................................................53
Ethernet configuration............................................................................................................................54
Ethernet status......................................................................................................................................54
Configuring IP routes settings........................................................................................... 56
Port preferences....................................................................................................................................56
IP routes configuration...........................................................................................................................57
Adding a new IP route.....................................................................................................................57
Viewing and deleting existing IP routes...........................................................................................58
Routes behavior with disabled ports................................................................................................58

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Current IP status....................................................................................................................................58
Configuring IP services ..................................................................................................... 59
Configuring SNMP settings ............................................................................................... 61
System information................................................................................................................................61
Configured trap receivers.......................................................................................................................62
Access control.......................................................................................................................................62
Configuring QoS settings.................................................................................................. 63
About QoS configuration settings...........................................................................................................63
ToS configuration ..................................................................................................................................64
DiffServ configuration ............................................................................................................................64
Default settings......................................................................................................................................64
Configuring general ISDN settings.................................................................................... 65
Basic settings........................................................................................................................................65
ISDN advanced settings........................................................................................................................68
ISDN codec settings..............................................................................................................................68
ISDN multipoint settings.........................................................................................................................69
Configuring ISDN ports settings........................................................................................ 70
Configuring ISDN ports settings (non-leased line mode).................................................. 71
Port settings..........................................................................................................................................71
Configuring ISDN ports settings in leased line mode ....................................................... 74
Port settings..........................................................................................................................................74
Configuring H.323 gatekeeper settings ............................................................................. 75
Gatekeeper settings ..............................................................................................................................75
Gatekeeper status.................................................................................................................................78
Configuring encryption settings........................................................................................ 80
Displaying and resetting system time ............................................................................... 81
System time ..........................................................................................................................................81
NTP.......................................................................................................................................................81
Using NTP over NAT (Network Address Translation) ......................................................................81
Configuring security settings............................................................................................ 82
Advanced security mode........................................................................................................................83
Hashing passwords ........................................................................................................................83
Password format.............................................................................................................................84
Expiring passwords.........................................................................................................................84
Upgrading and backing up the ISDN gateway................................................................... 85
Upgrading the main ISDN gateway software image................................................................................85

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Upgrading the loader software image.....................................................................................................85
Backing up and restoring the configuration.............................................................................................86
Enabling ISDN gateway features ...........................................................................................................86
Shutting down and restarting the ISDN gateway............................................................... 88
Displaying general status.................................................................................................. 89
Displaying ISDN status...................................................................................................... 90
Displaying hardware health status.................................................................................... 91
Displaying security status................................................................................................. 92
Working with the event logs .............................................................................................. 93
Event log...............................................................................................................................................93
Event capture filter..........................................................................................................................93
Event display filter...........................................................................................................................93
Syslog ............................................................................................................................................93
H.323 ....................................................................................................................................................94
Audit log................................................................................................................................................94
Call Detail Records................................................................................................................................94
Working with the audit logs............................................................................................... 95
Audit log................................................................................................................................................95
Understanding security warnings...................................................................................... 96
Logging using syslog...................................................................................................... 100
Syslog settings....................................................................................................................................100
Using syslog........................................................................................................................................101
Working with Call Detail Records .................................................................................... 102
Call Detail Record log controls.............................................................................................................102
Call Detail Record log..........................................................................................................................103
Downloading and clearing the log .................................................................................................103
CDR log display............................................................................................................................104
Further information about CDR time field ......................................................................................104
Customizing the user interface........................................................................................ 105
Configuring user interface settings.......................................................................................................105
Controlling the auto-refreshing of status pages on the ISDNgateway............................................105
Configuring welcome messages for the Login and Home pages...........................................................106
Customizing voice prompts on the ISDN gateway................................................................................106
Using default English voice prompts.............................................................................................106
Uploading a customization package..............................................................................................107
Viewing the available voice prompts .............................................................................................107
Uploading and downloading customized voice prompts.................................................................108

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Downloading individual voice prompts...........................................................................................109
Deleting customized voice prompts...............................................................................................109
Voice prompt specification...................................................................................................................110
Making the best possible recordings.............................................................................................110
Customization: More information .................................................................................... 111
Precedence..................................................................................................................................111
The factory default file set....................................................................................................................111
Localization files..................................................................................................................................111
Customization files ..............................................................................................................................111
Backing up and restoring the configuration using FTP .................................................. 112
Configuring SSL certificates............................................................................................ 113
License, copyright and trademark information ............................................................... 115

Logging into the web interface
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Logging into the web interface
The Cisco TelePresence ISDN gateway web interface is used for administering the Cisco TelePresence
ISDN GW 3241 and ISDN GW MSE 8321, monitoring the progress of active and completed calls,
managing dial plans and users, and for obtaining event logging information for reference or for
troubleshooting complex issues.
When connecting to the ISDN gateway web interface, you must log in so that the ISDN gateway can
associate the session with your configured user and a set of access privileges. The ISDN gateway has a
set of configured users, and each user has an ID and password that are used for logging in.
1. Using a web browser, enter the host name or IP address of the ISDN gateway.
2. To log in as the administrator, click Log in enter your assigned User name and Password.
3. Click OK
The main menu appears offering options based on your access privileges.
The Login page of the ISDN gateway displays a welcome banner which administrators can configure to
display text relevant to your organization. For more information, refer to Customizing the user interface.

Failing to log into the web interface
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Failing to log into the web interface
When connecting to the Cisco TelePresence ISDN gateway web interface, you must log in so that the
ISDN gateway can associate the session with your configured user and a set of access privileges. The
ISDN gateway has a set of configured users, and each user has an ID and password that are used for
logging in.
If you see the Access failed page, you have not been able to log in for one of the following reasons:
Invalid username/password: you have typed the incorrect username and/or password three
times. If this is an admin account, it is disabled for 30 minutes; for any other account, it is disabled
indefinitely (or until you, the administrator, re-enable the account from the User page)
No free sessions: the maximum number of sessions allowed simultaneously on the ISDN
gateway has been exceeded
Your IP address does not match that of the browser cookie you supplied: try deleting your
cookies and log in again
You do not have access rights to view this page: you do not have the access rights necessary
to view the page that you attempted to see
Page expired: the Change password page can expire if the ISDN gateway is not entirely happy
that the user who requested to change password, is actually the user submitting the change
password request. (This may happen if you use a new browser tab to submit the request.)
Invalid passwords
The ISDN gateway will disable a user's account if that user incorrectly enters a password three times
consecutively. If this is an admin account, it is disabled for 30 minutes; for any other account, it is
disabled indefinitely (or until you, the administrator, re-enable the account from the Users page)

Failing to log into the web interface
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Getting started with the ISDN gateway
Ensure you have correctly completed the physical setup of the ISDN gateway following the instructions
contained in the Getting Started Guide for the unit. You must also ensure that your endpoints and MCU
are correctly configured to operate with the ISDN gateway.
Before you can make calls using the ISDN gateway, you need to complete the setup of the unit using the
web interface as follows:
1. Log into the ISDN gateway: Use your browser to navigate to the IP address of the ISDN
gateway. Click Change log in and enter the user name 'admin' with no password. We
recommend that you change the admin user account to use a password as soon as possible.
2. Set up the ISDN interfaces:
a. Go to Settings > ISDN.
b. Select the ISDN interface type to match that of your installation: E1 is typically used in the
UK andmainline Europe, and T1 in North America. Use T1 (Japan) in Japan.
c. You may need to set other advanced ISDN settings. Only change these settings if you
know of a specific requirement to do so.
d. Click Apply changes.
e. If you made any changes on this page, you must restart the ISDN gateway before they
will take effect. Go to Settings > Shutdown and click Shut down ISDN GW.
3. Configure ISDN ports: Go to Settings > ISDN ports:
a. Set low and high channels:
•If you have a fully-populated PRI (this is the normal case) set Low channel to '1'
for all network types and High channel to Max.
•If you have a fractional PRI, where your provider offers a reduced number of B-
channels, enter alternative values as appropriate.
b. Set the Channel search order: When making calls,the ISDN gateway examines which B-
channels are free before placing a call. This search can be performed starting with the
high channel and working down, or starting with the low channel and working up. Your
ISDN provider will be able to advise which scheme to use, but the choice is not critical.
c. Click Apply changes and then, if required, repeat the above steps to configure further
ISDN ports. Select which port you wish to configure using the numbered links at the top
right of the page.
4. Configure the dial plan: The default behavior of the unit is to reject all calls. You must configure
a dial plan to allow permitted calls to be placed. The simplest configuration is to create a dial plan
that will connect any 'IP to ISDN' call that has been routed to the ISDN gateway to the number
that the caller has dialed (using any free enabled port) and that will connect any 'ISDN to IP' call
to the auto attendant of your MCU:
a. Go to Dial plan > IP to ISDN and click Add rule.
b. For Rule name, type in a name for the new rule.
c. For Condition, select Match anycalled number.
d. For Action, select Call with the original called number.
e. Leave the other values unchanged. Click Add rule to add the rule to the dial plan.

Failing to log into the web interface
Cisco TelePresence ISDN Gateways v2.0 Online help (Printable format) 10 of 116
f. Now go to Dial plan > ISDN to IP, and click Add rule.
g. For Rule name, type in a name for the new rule.
h. For Condition, select Match any called number.
i. For Action, select Call this number and enter the IP address of your MCU.
j. Leave the other values unchanged. Click Add rule to add the rule to the dial plan. Note:
for more information about dial plans, refer to Understanding the dial plan.

Making calls with the ISDN gateway
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Making calls with the ISDN gateway
The ISDN gateway allows:
users with ISDN endpoints to place calls to users with IP endpoints
users with IP endpoints to place calls to users with ISDN endpoints
When configured correctly, the ISDN gateway is transparent to users; they will require minimal assistance
and training to place calls through the ISDN gateway successfully.
One training consideration for users making ISDN calls which is not usually present for IP calls is that of
cost; you may want to educate users that ISDN calls escalate in cost with increased bandwidth and
duration. You may also want to configure the ISDN gateway to limit these values if required. (For more
information, refer to Understanding the dial plan).
For information about setting up the ISDN gateway, refer to:
the Getting Started Guide.
Getting started with the ISDN gateway
When you have the unit and associated devices (for example, the MCU) correctly configured, with an
appropriate dial plan in place, calls can be placed through the ISDN gateway.
ISDN to IP calls
If you have configured the dial plan as in Getting started with the ISDN gateway, endpoints calling the
phone number of the ISDN gateway will, after the call is completely established, be forwarded to the auto
attendant of the MCU. From here they may use the Far End Camera Controls (FECC) of their endpoint to
navigate the menus and join conferences as normal.
IP to ISDN calls
An IP to ISDN caller needs to know the number of the ISDN user whom they are calling. However, if the
call will be placed via a Cisco TelePresence MCU, the ISDN user's number can be incorporated into the
configured endpoint details stored on the MCU.
You can configure the ISDN gateway to allow calls to a single ISDN number. In this case, a single rule in
the dial plan will suffice, matching all numbers and calling out to a single phone number.
If you want users to be able to call any number, set the ISDN gateway up as a 'H.323 gateway' on your
MCU and direct calls to ISDN numbers via that. Alternatively, if you are using a gatekeeper on your IP
network, you can register a prefix with which users may prefix the ISDN number they want to call (this is
similar to dialing a '9' for an external line on many telephone systems).

Using the auto attendant
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Using the auto attendant
You can use the auto attendant on the ISDN gateway to enter the number you wish to call directly from
your endpoint. If you are calling from an IP endpoint, you should enter a phonenumber. If you are calling
from an ISDN endpoint, you should enter an IP address, (optionally followed by an extension number or
phone number).
If your administrator has set up calls to be directed to the auto attendant, then you will see the instruction:
"Enter the number you wish to call", and hear an audio prompt. (Users of audio-only endpoints can use
the auto attendant even though they can only hear the audio prompt.)
When you dial, you can use the following:
Digits 0 to 9
* (asterisk or star), which is interpreted as a dot for ISDN to IP calls
** interpreted as a : and used as an extension separator for ISDN to IP calls
# (hash), to indicate that you have completed the number and to start dialing
To call a specific extension, separate the number/address from the extension by typing a colon (:). For
example, to call the Cisco TelePresence MCU with IP "10.2.1.33", and try to join a conference with
numeric identifier "00000", you need to enter 10.2.1.33 : 00000 so you should type 10*2*1*33 ** 00000#
Note that if you do not include the #, the ISDN Gateway will dial after 20 seconds anyway. Equally, if you
do not enter any numbers but leave the auto attendant idle, the ISDN gateway will hang up the call after
60 seconds.
Using the Far End Camera Control
If FECC is enabled on your endpoint, use the Left arrow to delete the last character and the Right to start
dialing.

Using the ISDN gateway for voice-only calls
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Using the ISDN gateway for voice-only calls
The ISDN gateway can be used to forward voice-only IP calls to the ISDN network (the PSTN); likewise, it
can be used to forward voice-only ISDN calls from the PSTN to IP telephones on the IP network. If you
want to use the ISDN gateway to forward voice-only calls, there are two ways to configure this feature:
globally: either
oentirely as a voice-only gateway: where all IP calls and all ISDN calls are forwarded as
voice-only calls, or
opartly as a voice-only gateway: where incoming ISDN video-conferencing calls are
allowed, but outgoing ISDN calls are voice only (or vice versa)
dial plan configuration: where particular calls (ingoing and outgoing) are allowed to be video
conferencing calls, and where particular calls are restricted to voice-only
IP to ISDN calls: IP endpoints often do not allow the caller to specify the type of call being made. For
example, a caller may want to make a telephone call (that is, voice only), but are unable to specify that
this is a telephone call. To overcome this problem, for IP data calls, if required, the ISDN gateway can
extract the voice part of the call and forward it to the ISDN network as a voice-only call. For IP to ISDN
calls, if the ISDN gateway receives a video conferencing call that has been restricted to being a voice-
only call (due to the settings on the ISDN gateway), the unit will forward it as a voice-only call (the call will
not be dropped). If the IP endpoint does allow the call type to be specified, an IP telephone call will
always be placed as such.
ISDN to IP calls: ISDN endpoints usually allow a caller to specify the type of call being made. This is
important, because with ISDN calls the voice part of the call cannot be separated from the video part.
Therefore, if the ISDN gateway receives a video-conferencing call and the dial plan restricts the ISDN
gateway to voice-only calls, the unit will drop the call. Voice-only telephone calls will always be accepted
by the ISDN gateway.
Configuring the ISDN gateway as a voice-only gateway
1. Go to Settings > ISDN.
a. To configure the ISDN gateway to restrict incoming ISDN calls to voice-only calls, set the
Max incoming ISDN call rate to Telephone.
b. To configure the ISDN gateway to restrict outgoing ISDN calls to voice-only calls, set the
Max outgoing ISDN call rate to Telephone.
2. Complete the other ISDN settings as per your requirements. For more information about the
ISDN settings page, refer to Configuring general ISDN Settings.
Note:You can set both the incoming and outgoing maximum call rates to Telephone to use the ISDN
gateway entirely as a voice-only gateway.

Using the ISDN gateway for voice-only calls
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Dial plan configuration
You can configure the dial plan to restrict particular called numbers to voice-only calls. In this way, you
can configure the ISDNgateway to allow particular outgoing/incoming ISDN calls to be video-
conferencing calls. Using thedial plan therefore allows you greater flexibility (if you need it) than using the
global settings on the ISDN settings page.
You can use the dial plan to place a call where the ISDN gateway will start sending DTMF tones after a
telephone call has connected. This is useful if there is a call through the ISDN GW to a device which is
perhaps behind another gateway which only supports DTMF to decide how to route the calls. The caller is
not required to additionally enter the DTMF codes manually on the telephone keypad but instead can
have the call re-routed automatically using the dial plan of the ISDN GW.
For more information about configuring the dial plan, refer to Understanding the dial plan, Adding dial plan
rules, and Example dial plan rules.
Calling a PSTN telephone from an MCU
If you want to call someone on a regular land-line telephone into a conference on the MCU, you must add
the ISDN gateway as a participant, using one of the following methods:
specify it as a gateway with an extension.
call a particular number registered to a common gatekeeper.
call the ISDN gateway by IP and let the ISDN gateway itself work out which number to call based
on dial plan rules.
Whichever method you use, you must have a dial plan configured such that a rule is invoked that has
"Telephone" bandwidth specified for the call. Then the call will be established correctly.

Using the ISDN gateway for voice-only calls
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Displaying ISDN port utilization
For each ISDN port, you can view details of any port activity for each ISDN channel. To display ISDN port
utilization details, go to ISDN > ISDN ports.
A message shows the status of ISDN layers 1 (physical) and 2 (D-channel). The same information is
shown in the ISDN Status page.
Note that if the ISDN gateway is in leased line mode, there will be no status for layer 2.
The following information is displayed for each channel of every ISDN port:
Field Field description
#
The ISDN channel number.
Activity
Whether or not this channel on this port is currently active. Activity is one of:
inactive: not in use.
active (data):
in use. A voice and video call is taking place and is using this
channel.
active (voice): in use. An audio-only call is taking place and is using this
channel.
Direction
If the channel is active, the direction of the call is displayed. Either:
inbound: for calls to the ISDN endpoint.
outbound: for calls from the ISDN endpoint.
Calling party
The identity of the endpoint that initiated the call (depending on what that endpoint
has provided):
for IP-ISDN calls (that is, outbound calls), this is the name of the H.323
device, the telephone number, or "Cisco TelePresence ISDN gateway".
for ISDN-IP calls (that is, inbound calls), this is the telephone number of the
endpoint that made the call.
Called party
The number that was dialed by the calling party. Note that if the ISDN gateway is in
leased line mode, there will be no called part number available.
For each port there is an Activate D-channel now button that is only active if layer 1 is up and layer 2 (D-
channel) is not. If neither or both are up for a port, the button is disabled for that port. Click the button to
bring up the D-channel.
Note: Typically, you need never do this because the ISDN gateway automatically tries to bring up the D-
channelperiodically. Also clicking the button is not guaranteed to work.

Displaying the ISDN calls list
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Displaying the ISDN calls list
The ISDN Calls List displays both active calls and completed calls on the ISDN gateway together with
their basic settings. The list enables you to disconnect active calls and to delete completed calls from the
list. For active calls, you can display further details (see Displaying detailed call information).
Active calls are those calls that are taking place now. The active calls list shows all calls that are currently
taking place. The maximum number of calls that can take place simultaneously is constrained by the
ISDN bandwidth available to the ISDN gateway.
Completed calls are calls that have ended. The completed calls list shows only the most recent calls (up
to 20 calls). Older calls are automatically deleted from the list.
To display the ISDN Calls List go to ISDN > ISDN calls.
Field Field description
Type
The type of call, which will either be IP to ISDN or ISDN to IP.
Participants
The participants in the call. An IP participant will be listed by IP address. An ISDN
participant will be listed by ISDN number.
Details
For example, the time that the call started, its duration and whether encryption is
used.
Progress
Progress is indicated for active calls only.
Disconnecting and deleting calls
To disconnect active calls, go to ISDN > ISDN Calls:
To disconnect particular calls, select the calls you want to disconnect and click Disconnect
selected.
To disconnect all active calls, click Disconnect all.
To delete calls from the list of completed calls, go to ISDN > ISDN calls:
To delete particular calls from the list, select the calls you want to delete and click Purge
selected.
To delete all completed calls, click Purge all.
Diagnostic controls
By default diagnostic logging is disabled. This feature is for use by Cisco customer support and we
suggest that you do not change the setting unless instructed to do so.

Displaying the ISDN calls list
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Displaying detailed call information
Active calls are listed along with some basic details in the ISDN Calls List (see Displaying the ISDN Calls
List). To view additional details about an active call, go to ISDN > ISDN Calls and click more for the call
about which you want more information.
On the Call details page, the call for which more details are provided is displayed with a number
(example: "Call 15 details"). This number is generated by the ISDN gateway (numerically, starting from
zero since the last reboot) for the purposes of internal identification.
Field
Field description
Started at
For IP to ISDN calls, this is the time at which the call was received by the ISDN
gateway.
For ISDN to IP calls, this is the time at which all the channels comprising the call
connected and bonded.
Call progress
The status of the call, which will be one of:
Initial: an IP or ISDN call has just come in, and the ISDN gateway is
determining if it is allowed and where to direct it.
Calling out: the ISDN gateway is trying to make contact with the other side
of the call.
Connected: the call is in progress between and IP and ISDN endpoints.
Dying: Displayed briefly while a call is terminated, either by one of the
participants or via the web interface.
Call progress also lists the caller's number, the number that was called and the
destination, including the IP address for an IP destination.
Participant details
Unique index
A unique numeric identifier given by the ISDN gateway to this part of the call.
Name
The name the caller provided when the call was initiated.
E.164
The telephone number of the participant.
Call type
The participant's call type: either H.320 (ISDN caller) or H.323 (IP caller).
FECC
Whether Far-End Camera Control has been established or not.
Progress
The status of the participant's side of the call, which will be one of:
Initial: the call is just starting.
Proceeding: trying to make contact with the other side of the call.
Alerting: the other side of the call is ringing (you might not see this state).
Connected: the call is in progress.
Disconnecting: the call is in the process of going down.
Finished: the call is disconnected (you might not see this state).

Displaying the ISDN calls list
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Encryption
This field tells you whether encryption is active and if so, whether all or only some
of the media channels are encrypted.
Channel
bonding map
Only for ISDN participants: The numbers of the ISDN channels that are in use for
this call.
Channel rate
Only for ISDN participants: Whether or not restricted 56k mode is in use for the
received (rx) and/or transmitted (tx) part of an ISDN call. For unrestricted calls (rx
and/or tx), the channel rate will be 64kbps.

Understanding the dial plan
Cisco TelePresence ISDN Gateways v2.0 Online help (Printable format) 19 of 116
Understanding the dial plan
The ISDN gateway uses the dial plan to determine how to route calls between IP and ISDN networks.
When the ISDN gateway receives a request to initiate a new IP to ISDN or ISDN to IP call, it examines
the called number (if available), and uses the dial plan to determine whether to reject the call, find out
which number should be called to initiate the outgoing part of the call, and to check the allowed call
bandwidth.
There are a number of different ways in which you can use the dial plan. For example, you can use the
dial plan to enable callers to use a particular bandwidth for an IP to ISDN call. You can also use the dial
plan to enable the ISDN gateway to join incoming ISDN calls to the correct conference on an MCU. (For
example dial plans, refer to Example dial plan rules.)
The dial plan is actually divided into two; an IP to ISDN dial plan and an ISDN to IP dial plan. If the
incoming part of a connection is from an IP endpoint, the IP to ISDN dial plan is used; if it is from an ISDN
endpoint, the ISDN to IP dial plan is used. The behavior of the two dial plans is nearly identical, and the
sections below only make a distinction between the two where differences exist.
The maximum number of rules that can be added to each dial plan is 200.
Note that if you have configured the ISDN gateway to use leased line mode, then the options available on
the dial plan are different to those available in non-leased line mode.
Refer to the sections below for more information about the use and administration of dial plans:
Rules
Using rules
Rule ordering
Rules
Dial plans are administered using rules. Rules and their addition and control are nearly identical for the IP
to ISDN and ISDN to IP dial plans.
Each rule has a name and comprises:
a condition that must be matched for the rule to be invoked
The condition can be set to match any called number, to match a call that has no called number,
or can specify the called number by specific number or pattern.
an action that is carried out if the rule is invoked
The action can be to reject the call, enter the auto attendant, enter the auto attendant and use a
TCS-4 extension (ISDN to IP only), to place the call using the original dialed number, or to specify
the number/address to call.
a set of additional parameters that modify the action:
oCall type: specifies whether the call is a normal video call, a telephone call, or a video call
that supports legacyISDN endpoints that use n x 64kbps or n x 56kbps
oRestrict (56k): whether a call will use 56kbps. Note that if 56k is specified for a rule, but
the endpoint only supports 64kbps, then the call will be terminated rather than use
56kbps

Understanding the dial plan
Cisco TelePresence ISDN Gateways v2.0 Online help (Printable format) 20 of 116
oMaximum bandwidth: used to limit the bandwidth available to for calls to particular
numbers, or to allow users to select their own bandwidth (for more information, see
Adding dial plan rules)
oEncryption settings: whether transparent encryption is to be used and if not, whether
encryption is Optional or Required for the IP and ISDN parts of the call
oPlace/Receive call on: the port(s) to use if you need to bond channels to complete
subsequent calls from the calling endpoint
a choice of allowed codecs
Using rules
Each dial plan comprises a set of rules. When the ISDN gateway receives a new incoming call, it selects
the appropriate dial plan, then compares the called number (if available) to the condition of each rule in
that dial plan until a match is found. When a match is found, no more rules are checked, and the action of
the matching rule is used to determine what should be done next; typically the outgoing part of the
connection will be initiated - calling a number specified by the action, the auto attendant is displayed or
the connection will be rejected and the incoming part terminated.
If a dial plan contains no rules, or if no rule's condition matches the called number, calls are rejected by
default.
For more information on adding and modifying dial plan rules, see Adding dial plan rules.
Rule ordering
Rules are always checked in the same order for each incoming call. This means that a dial plan can be
designed to handle specific calling cases first, then general calls if no specific cases match. For example,
a dial plan might be set up to call a particular endpoint if an incoming call is received to a specific number,
but all other incoming calls get connected to an operator. Such a dial plan might look like this:
Condition: Called number is "6056" / Action: Call with the original called number.
Condition: Match any called number / Action: Call this number "1000"
Clearly rule ordering is important to achieve this functionality. You can view and test the rule list
comprising a dial plan, and modify the ordering of the rules by dragging and dropping as required. (You
can also use the up and down links to reorder.) For more information, see Displaying and testing the dial
plan.