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Call Holding and Retrieving
For this feature to work, you must request it when you order your ISDN line. For 
information on ordering your ISDN line, see Appendix D, “Provisioning an ISDN 
Line.” However, you do not need to configure the router to make this feature 
work. 
You can put an active voice call on hold, make a second call, and toggle between 
the two calls. Follow these steps:
Step 1Put the active call on hold, and get a dial tone by quickly pressing the telephone 
receiver (flash) button once, and then entering **95# on the telephone keypad. 
Step 2Make the second call.
Step 3Toggle between the two calls by quickly pressing the flash button.
If you hang up with a call still on hold, the phone rings to remind you of the 
outstanding call. Pick up the handset to reconnect to the call.
Call Waiting
For this feature to work, you must request it when you order your ISDN line. For 
information on ordering your ISDN line, see Appendix D, “Provisioning an ISDN 
Line.” 
By default, call waiting is enabled. You can disable it permanently by using the 
no call-waiting command. (You might want to disable it for fax machines.) 
Because the router associates call waiting with the ISDN directory number 
assigned to a telephone interface, you should disable call waiting at the same time 
that you are configuring a dial peer. For information on dial peers and how to 
configure them, refer to the “Creating Dial Peers” section on page 6-4.
To disable call waiting on a per-call basis, enter **99# on the telephone keypad. 
During an active voice call, a call-waiting tone sounds if another call comes in. 
Subsequent tones sound at 10-second intervals until the incoming caller hangs up 
or until you answer the call. During this time, the incoming caller hears ringing. 
						

							 
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When you hear the call-waiting tone, you can do one of the following:
Put the current call on hold, and answer the incoming call
Hang up the current call, and answer the new call.
To put the current call on hold and answer the incoming call, quickly press the 
telephone receiver (flash) button once. Press this button again to go back to the 
current call.
Three-Way Conference Call
For this feature to work, you must request it when you order your ISDN line. For 
information on ordering your ISDN line, see Appendix D, “Provisioning an ISDN 
Line.”
If you are connected to a National ISDN-1 (NI1) or a Northern Telecom DMS-100 
custom switch, you might need to activate this feature by using the following 
command syntax:
isdn conference-code range
The range is from 0 to 999. The default code is 60. Your telephone service 
provider should provide a code when you order this feature; if a code other than 
60 is provided, you need to reconfigure the code using the isdn conference-code 
command.
Otherwise, you do not need to configure the router to make this feature work.
You can talk simultaneously with two other parties. To create a conference call, 
follow these steps:
Step 1Put the first party on hold and get a dial tone by quickly pressing the telephone 
receiver (flash) button once. 
Step 2Dial the second party.
Step 3Add the first party to the call by quickly pressing the flash button. 
						

							 
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Call Transfer
For this feature to work, you must request it when you order your ISDN line. For 
information on ordering your ISDN line, see Appendix D, “Provisioning an ISDN 
Line.”
If you are connected to a National ISDN-1 (NI1) or a Northern Telecom DMS-100 
Custom switch, you might need to activate this feature, using the following 
command syntax:
isdn transfer-code range
The range is from 0 to 999. The default code is 61. Your telephone service 
provider should provide a code when you order this feature; if a code other than 
61 is provided, you need to reconfigure the code by using the isdn transfer-code 
command.
Otherwise, you do not need to configure the router to make this feature work.
You can transfer an incoming or outgoing voice call to another party. To transfer 
a call, do the following:
NoteIf you are connected to an NTT switch, you will not be able to transfer an outgoing 
call.
Step 1Put the first party on hold, and get a dial tone by quickly pressing the telephone 
receiver (flash) button once. 
Step 2Dial the second party to which you want to transfer the call.
Step 3While still connected to the second party, hang up.
Hanging up connects the first and second parties. Instead of doing Step 3, you can 
also create a three-way call conference by quickly pressing the flash button once.
If the call to the second party fails, you can return to the first party by doing one 
of the following:
Quickly pressing the telephone receiver (flash) button once
Hanging up
If you hang up, the telephone rings to indicate that the first party is still on hold. 
						

							 
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Call Forwarding
The call forwarding feature works for Sweden and Finland only. For this feature 
to work, you must request it when you order your ISDN line. For information on 
ordering your ISDN line, see Appendix D, “Provisioning an ISDN Line.”
The router supports the following call forwarding features:
Call forwarding unconditional (CFU)—you can forward all incoming calls to 
another telephone number.
Call forwarding no reply (CFNR)—you can forward incoming calls that are 
not answered within a defined period to another telephone number.
Call forwarding busy (CFB)—you can forward incoming calls that get a busy 
signal to another telephone number.
To make sure that the router accepts the activation and deactivation of the call 
forwarding features using the telephone keypad, use the pots country country 
command in global configuration mode. The country variable is the country that 
your router is in. Enter the pots country ? command to get a list of supported 
countries and the code you must enter to indicate a particular country.
To activate call forwarding unconditional, call forwarding no reply, or call 
forwarding busy, follow these steps:
Step 1Pick up the telephone handset.
Step 2Enter the following on the telephone keypad:
*feature-number *telephone-number-to-forward-to#
Your telephone service provider should provide the number for each call 
forwarding feature. For example, to forward a call to 408-555-2222, enter the 
following:
*21*4085552222#
Step 3Hang up the handset. 
						

							 
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To deactivate call forwarding unconditional, call forwarding no reply, or call 
forwarding busy, follow these steps:
Step 1Pick up the telephone handset.
Step 2Enter the following on the telephone keypad:
#feature-number#
Your telephone service provider should provide the number for each call 
forwarding feature. For example, to deactivate call forwarding, enter the 
following:
#21#
Step 3Hang up the handset.
NoteIn the U.S., the call forwarding variable (CFV) feature is available with the NI1 
capability package EZ-1. With CFV, you can forward incoming calls. You can 
turn this feature on or off through access codes supplied by your telephone service 
provider.
POTS Dial Feature (Japan Only)
The Cisco 813 router supports the plain old telephone service (POTS) dial feature 
for Japanese telephones. This feature can be activated by a dial application on 
your workstation that dials a telephone number for the POTS port on the 
Cisco 813 router. The telephone connected to the port can be on- or off-hook 
when the dial command is issued. If the telephone is on-hook, the router rings the 
telephone, waits until the telephone is taken off hook, then dials the number 
requested. If the telephone is off-hook when the command is issued, the router 
dials the number requested, provided that the telephone is receiving a dial tone. 
						

							 
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Activating the POTS Dial Feature
Each time you wish to activate this feature on the router for use by the dial 
application, enter the following Cisco IOS command in EXEC mode:
test pots port dial number [#]
where port is the port number 1 or 2, and number is the telephone number to dial.
NoteThe router does not turn off dual tone multifrequency (DTMF) detection from 
the telephone when you enter the POTS dial command. If you do not terminate 
the number variable with a pound (#) character, you can complete the call by 
using the telephone key pad.
The following example shows the POTS dial command:
router# test pots 1 dial 4085551234#
Displaying POTS Call State
To show the current state of POTS calls and the most recent event received by the 
call switching module (CSM), use the show pots csm command in EXEC mode.
show pots csm port
where port is port number 1 or 2.
Output Example
The following is an example of the show pots csm command screen output:
router# show pots csm 1
POTS PORT: 1
   CSM Finite State Machine:
      Call 0 - State: idle, Call Id: 0x0
               Active: no
               Event: CSM_EVENT_NONE Cause: 0 
						

							 
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      Call 1 - State: idle, Call Id: 0x0
               Active: no
               Event: CSM_EVENT_NONE Cause: 0
      Call 2 - State: idle, Call Id: 0x0
               Active: no
               Event: CSM_EVENT_NONE Cause: 0
router#
Disconnecting a POTS Call
To disconnect a telephone call for the POTS port on the router, use the test pots 
port disconnect command in EXEC mode:
test pots port disconnect
where port is the port number 1 or 2.
The following example disconnects a telephone call from POTS port 1:
router# test pots 1 disconnect
router#
POTS Debug Command
To display the status of calls made to and from the POTS ports, enter the 
following command in EXEC mode:
debug pots csm
Entering this command activates events by which your dial application can 
determine the progress of calls to and from the ports. 
						

							 
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Debug Message Formats
Debug messages are displayed in one of two formats that are relevant to the POTS 
dial feature:
hh:mm:ss: CSM_STATE: CSM_EVENT, call id = ??, port = ?
or
hh:mm:ss: EVENT_FROM_ISDN:dchan_idb=0x???????, call_id=0x????, ces=? 
bchan=0x????????, event=0x?, cause=0x??
where:
hh:mm:ss is a timestamp in hours, minutes, and seconds.
CSM_STATE is one of the call switching module (CSM) states listed in 
Ta b l e 6 - 4.
call id is a hexadecimal value from 0x00 to 0xFF.
port is telephone port 1 or 2.
EVENT_FROM_ISDN is a CSM event. Ta b l e 6 - 5 shows a list of CSM events.
dchan_idb is an internal data structure address.
ces is the connection end point suffix used by ISDN.
bchan is the channel used by the call. A value of 0xFFFFFFFF indicates that 
a channel is not assigned.
event is represented by a hexadecimal value that is translated into a CSM 
event. Ta b l e 6 - 6 shows a list of events and the corresponding CSM events.
cause is represented by a hexadecimal value that is given to call-progressing 
events. Ta b l e 6 - 7 shows a list of cause values and definitions.
CSM States
Ta b l e 6 - 4 shows the values for CSM states.
Table 6-4 CSM States
CSM State Description
CSM_IDLE_STATE Telephone on hook
CSM_RINGING Telephone ringing 
						

							 
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CSM Events
Ta b l e 6 - 5 shows the values for CSM events. CSM_SETUP Setup for outgoing call in progress
CSM_DIALING Dialing number of outgoing call
CSM_IVR_DIALING Interactive voice response (IVR) for Japanese 
telephone dialing
CSM_CONNECTING Waiting for carrier to connect the call
CSM_CONNECTED Call connected
CSM_DISCONNECTING Waiting for carrier to disconnect the call
CSM_NEAR_END_DISCONNECTING Waiting for carrier to disconnect the call
CSM_HARD_HOLD Call on hard hold
CSM_CONSULTATION_HOLD Call on consultation hold
CSM_WAIT_FOR_HOLD Waiting for carrier to put call on hard hold
CSM_WAIT_FOR_CONSULTATION_HOLD Waiting for carrier to put call on consultation hold
CSM_CONFERENCE Waiting for carrier to complete call conference
CSM_TRANSFER Waiting for carrier to transfer call 
CSM_APPLIC_DIALING Call initiated from Cisco IOS command-line 
interface (CLI)
Table 6-4 CSM States (continued)
CSM State Description
Table 6-5 CSM Events
CSM Events Description
CSM_EVENT_INTER_DIGIT_TIMEOUT Time waiting for dial digits has expired
CSM_EVENT_TIMEOUT Near or far end disconnect timeout
CSM_EVENT_ISDN_CALL Incoming call
CSM_EVENT_ISDN_CONNECTED Call connected
CSM_EVENT_ISDN_DISCONNECT Far end disconnected 
						

							 
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CSM_EVENT_ISDN_DISCONNECTED Call disconnected
CSM_EVENT_ISDN_SETUP Outgoing call requested
CSM_EVENT_ISDN_SETUP_ACK Outgoing call accepted
CSM_EVENT_ISDN_PROC Call proceeding and dialing completed
CSM_EVENT_ISDN_CALL_PROGRESSING Call being received in band tone
CSM_EVENT_ISDN_HARD_HOLD Call on hard hold
CSM_EVENT_ISDN_HARD_HOLD_REJ Hold attempt rejected
CSM_EVENT_ISDN_CHOLD Call on consultation hold
CSM_EVENT_ISDN_CHOLD_REJ Consultation hold attempt rejected
CSM_EVENT_ISDN_RETRIEVED Call retrieved
CSM_EVENT_ISDN_RETRIEVE_REJ Call retrieval attempt rejected
CSM_EVENT_ISDN_TRANSFERRED Call transferred
CSM_EVENT_ISDN_TRANSFER_REJ Call transfer attempt rejected
CSM_EVENT_ISDN_CONFERENCE Call conference started
CSM_EVENT_ISDN_CONFERENCE_REJ Call conference attempt rejected
CSM_EVENT_ISDN_IF_DOWN ISDN interface down
CSM_EVENT_ISDN_INFORMATION ISDN information element received (used by 
Nippon Telegraph and Telephone [NTT] IVR 
application)
CSM_EVENT_VDEV_OFFHOOK Telephone off hook
CSM_EVENT_VDEV_ONHOOK Telephone on hook
CSM_EVENT_VDEV_FLASHHOOK Telephone hook switch has flashed
CSM_EVENT_VDEV_DIGIT DTMF digit has been detected
CSM_EVENT_VDEV_APPLICATION_CALL Call initiated from Cisco IOS command-line 
interface (CLI)
Table 6-5 CSM Events (continued)
CSM Events Description