Cisco Router 800 Series Software Configuration Guide

							 
6-65
Cisco 800 Series Software Configuration Guide
78-5372-06
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
Caller ID on the Cisco 813 Router
The correct information is as follows:
By default, the caller ID feature is disabled. To enable this feature, use the 
Cisco IOS caller-id command in the dial-peer configuration command mode.
caller-id
no caller-id
Debug POTS Commands
Use the following commands to debug problems with caller ID configuration:
debug pots driver
debug pots csm
Use the following commands for problems configuring other supplementary 
telephone features:
debug pots csm
debug isdn event
debug isdn q931
For more information about using debug commands, refer to the Cisco IOS 
documentation.
Local Call Forwarding
The local call forwarding feature enables you to forward an incoming voice call 
to an external telephone number if that call is not answered within a certain 
number of ring cycles. Highlights of this feature are as follows:
If the telephone is picked up at the forwarded destination, the router connects 
the incoming call to the new destination. 
If the forwarded destination does not pick up the call within the timeout 
period, the router disconnects the call. 
If either party hangs up after a successful connection, the router disconnects 
the call. 
						

							 
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
6-66
Cisco 800 Series Software Configuration Guide
78-5372-06
NoteThe call forwarding feature uses the B channels to forward the voice call and 
to connect the caller and the forwarded destination. If one or both B channels 
are busy with data calls, the incoming voice call supersedes the data calls.
Configuring Local Call Forwarding
To configure local call forwarding on your router, use the following Cisco IOS 
command in dial-peer configuration mode:
forward number after number of rings
no forward number after number of rings
where number is the external telephone number to forward an incoming voice 
call, and number of rings is the maximum number of ring cycles (from 0 to 7) 
before the router forwards the call. By default, this feature is disabled.
Local Call Forwarding Scenarios
Ta b l e 6 - 1 6 shows scenarios for local call forwarding:
Table 6-16 Scenarios for Local Call Forwarding
Condition B1 Channel B2 Channel Event Result
The feature is 
enabled through 
the 
command-line 
interface. Free. Free. An external 
voice call comes 
in to POTS 1 or 
POTS 2.The call is forwarded to the external 
destination number specified, and 
both B channels are busy with call 
forwarding. If the forwarded 
destination is busy, the router sends 
a disconnect signal to the incoming 
call. 
						

							 
6-67
Cisco 800 Series Software Configuration Guide
78-5372-06
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
The feature is 
enabled through 
the 
command-line 
interface. Data call in 
progress.Data call in 
progress.An external 
voice call comes 
in to POTS 1 or 
POTS 2.The router waits for the specified 
number of rings and then bumps a 
data call to make a call to the 
forwarding destination. If the 
forwarded destination responds with 
a connect, then the router bumps the 
second data call and connects to the 
incoming call. The external caller 
and the forwarded destination will 
be able to converse. If the 
forwarding destination is busy, the 
router sends a disconnect to the 
incoming external call and the 
second data call is not bumped.
The feature is 
enabled through 
the 
command-line 
interface.Data call in 
progress.Free. An external 
voice call comes 
in to POTS 1 or 
POTS 2.The router waits for the specified 
number of rings and then makes a 
call to the forwarding destination. If 
the forwarded destination responds 
with a connect, the router bumps the 
data call and connects to the external 
incoming call. Now the external 
caller and the forwarded destination 
will be able to converse. If the 
forwarding destination is busy, the 
router sends a disconnect to the 
incoming call and the existing data 
call is not bumped.
The feature is 
enabled through 
the 
command-line 
interface.Voice call 
in progress.Voice call 
in progress.An external 
voice call comes 
in to POTS 1 or 
POTS 2.The router waits for the specified 
number of rings and then verifies 
that both the B channels are free. If 
the voice call from POTS 1 or POTS 
2 is active, the router sends a 
disconnect signal to the incoming 
call.
Table 6-16 Scenarios for Local Call Forwarding (continued)
Condition B1 Channel B2 Channel Event Result 
						

							 
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
6-68
Cisco 800 Series Software Configuration Guide
78-5372-06
Local Call Forwarding Configuration Example
The following is an example of configuring the local call forwarding feature:
router# configure terminal
router(config)# dial-peer voice 1 pots
router(config-dial-peer)# forward 8765432 after 0
router(config)# dial-peer voice 2 pots
router(config-dial-peer)# forward 1234567 after 3
Local Call Forwarding Configuration Output Example
The following is an example of the output for local call forwarding configuration:
dial-peer voice 1 pots 
destination-pattern 5551111
port 1
no call-waiting
ring 0
volume 4
caller 1112222 ring 3
caller 2223333 ring 1
caller 3334444 ring 1
subaddress 20
forward 8765432 after 0 
dial-peer voice 2 pots 
destination-pattern 5552222
port 2
no call-waiting
The feature is not 
enabled.Local call 
forwarding 
is on.Local call 
forwarding 
is on.An external 
voice call comes 
in to POTS 1 or 
POTS 2.Call waiting is not supported in this 
case. The router sends a disconnect 
signal to the incoming voice 
call.The caller hears a busy tone.
The feature is not 
enabled.Local call 
forwarding 
is on.Local call 
forwarding 
is on.The user at 
POTS 1 or POTS 
2 makes an 
outgoing call.The user at POTS 1 or POTS 2 
cannot make an external call.
Table 6-16 Scenarios for Local Call Forwarding (continued)
Condition B1 Channel B2 Channel Event Result 
						

							 
6-69
Cisco 800 Series Software Configuration Guide
78-5372-06
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
ring 0
volume 2
caller 1111111 ring 1
caller 2223323 ring 2
caller 3213213 ring 3
caller 8552345ring 1
caller 2223456 ring 2
caller 3214567 ring 2
subaddress 10
forward 1234567 after 3 
Support for PIAFS
Personal Handy-Phone System (PHS) Internet Access Forum Standard (PIAFS) 
is a standard error-correction protocol for cellular data communication that is 
designed to pass data over the Personal Handy-Phone System (PHS) of cellular 
system. It also provides transmission control procedures (comparable to OSI 
reference model layer 2) for high-quality data transmission. Both PIAFS version 
2.0 and version 2.1 are supported on the Cisco 800 series routers.
The following common applications are supported using PIAFS in PHS data 
communications:
E-mail service
This enables the user to send and receive e-mail messages. E-mail is a basic 
service of the PHS multimedia communications menu.
Fax service
This enable faxing of data stored in a Personal Digital Assistant (PDA). 
Internet access
Internet access has influenced PHS in that many users want to be able to 
obtain necessary information in a timely manner when they are outdoors. It 
is also projected that PHS will be used extensively to form intranets for 
in-house communications by facilitating the expansion of office LAN access 
points. 
						

							 
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
6-70
Cisco 800 Series Software Configuration Guide
78-5372-06
Photograph transmission service
This service can be realized by transmitting the signals of a digital still 
camera directly or through the medium of a personal computer. This can be 
regarded as another variation of data transmission service that can use the 
PHS for transmission.
Mobile office service
The spread of groupware recently has led to frequent instances where groups 
share common data bases in carrying out or supporting the execution of 
collaborative work. There are demands to extend this collaborative 
environment even to outside locations through the use of mobile 
communications. This is made possible by the use of PHS data 
communications.
The Cisco 800 series routers will accept incoming PIAFS calls from a peer 
supporting PIAFS 2.2 and will behave as speed variable type 2 devices. The 
Cisco 800 series routers will not request speed change but will respond to the 
speed change requests from the peer. See Ta b l e 6 - 1 7 below.
The table indicates that the Cisco 800 series routers will act only as a PIAFS speed 
variable type 2 device for all the peers supporting PIAFS 2.2.
Configuring PIAFS
This feature is available by default in all images. It is enabled when the ISDN 
switch type is set to INS (NTT) and PPP encapsulation is configured on the ISDN 
interface.
Table 6-17 PIAFS Protocol for Request and Response
PIAFS Peer Request Protocol (Data 
Link Initiation Side)800 PIAFS Subsystem Response 
Protocol (Data Link Reception Side)
Fixed speed Fixed speed
Speed variable type 1 Speed variable type 2
Speed variable type 2 Speed variable type 2
Speed variable type 3 Speed variable type 2 
						

							 
6-71
Cisco 800 Series Software Configuration Guide
78-5372-06
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
PIAFS Scenarios
Ta b l e 6 - 1 8 shows scenarios for PIAFS. The feature is activated when the ISDN 
switch type is set to INS(NTT) and PPP encapsulation is configured on the ISDN 
interface.
Table 6-18 Scenarios for PIAFS 
B1 Channel B2 Channel Event Result
Free Free An incoming PIAFS 
call comes in to the 
router.The router negotiates the data 
transmission protocol and accepts the 
PIAFS call. The PIAFS peer runs the PHS 
application.
Data or voice 
call in progressFree An incoming PIAFS 
call comes in to the 
router.The router negotiates the data 
transmission protocol and accepts the 
PIAFS call. The PIAFS peer runs the PHS 
application.
Data or voice 
call in progressData or voice 
call in progressAn incoming PIAFS 
call comes in to the 
router.The router does not bump a data or voice 
call for a PIAFS call, therefore does not 
accept the PIAFS call.
Free Free The router is handling a 
64 kbps PIAFS call, 
with a current speed of 
32 kbps. During the 
course of the call, the 
remote end requests a 
rate change to 64 kbps.
The router is handling a 
64 kbps PIAFS call. 
During the course of the 
call, the remote end 
requests a rate change to 
32 kbps.The router successfully changes the speed 
of the PIAFS call from 32 kbps to 
64 kbps.
The router successfully changes the speed 
of the PIAFS call from 64 kbps to
32 kbps. 
						

							 
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
6-72
Cisco 800 Series Software Configuration Guide
78-5372-06
Free Free The router is handling a 
64 kbps PIAFS 2.0 call. 
During handover, the 
new cell is not able to 
allocate two channels 
for maintaining 
64 kbps, so it requests 
the router to decrease 
the speed of the PIAFS 
call from 64 kbps to 
32 kbps.
The router is handling a 
64 kbps PIAFS 2.1 call. 
During handover, the 
new cell is not able to 
allocate two channels 
for maintaining 
64 kbps, so it requests 
the router to decrease 
the speed of the PIAFS 
call from 64 kbps to 
32 kbps.Since PIAFS 2.0 supports only fixed rate 
PIAFS call, the router does not accept the 
PIAFS call.
Since PIAFS 2.1 supports best effort 
connection, the speed of the current 
PIAFS call is successfully decreased 
from 64 kbps to 32 kbps.
Free PIAFS call in 
progressThe router is handling a 
PIAFS 2.0 call with the 
caller supporting PIAFS 
2.0. A new PIAFS call 
comes from a caller 
supporting PIAFS 2.1
The router is handling a 
PIAFS 2.1 call with the 
caller supporting 
PIAFS 2.1. A new 
PIAFS call comes from 
a caller supporting 
PIAFS 2.0The router simultaneously handles both 
PIAFS 2.0 and 2.1 calls.
The router simultaneously handles both 
PIAFS 2.0 and 2.1 calls.
Table 6-18 Scenarios for PIAFS  (continued)
B1 Channel B2 Channel Event Result 
						

							 
6-73
Cisco 800 Series Software Configuration Guide
78-5372-06
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
PIAFS Status
The status of the PIAFS calls on the router can be checked by using the following 
command in privileged mode:
show piafs status
PIAFS Configuration Output Example
The following is an example of the output for PIAFS configuration:
Number of active calls = 1
Details of connection 0
Call Direction is - INCOMING
    The speed is - 32K
    The Bchan assigned for this call is - B1 CHAN
    V42 Negotiated - YES
    V42 Parameters
        Direction - BOTH
        No of code words - 4096
        Max string length - 250
    First PPP Frame Detected - YES
    Piafs main FSM state - PIAFS_DATA 
						

							 
Chapter 6      Configuring Telephone Interfaces
Cisco 804 and 813 Routers Enhanced Voice Features
6-74
Cisco 800 Series Software Configuration Guide
78-5372-06