Cisco 2600 Series Technical document

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Cisco IOS Voice, Video, and Fax Configuration Guide
Caller ID on Cisco 2600 and 3600 Series Routers
and Cisco MC3810 Multiservice Concentrators
This appendix describes Cisco IOS configuration for caller ID as supported on the Cisco MC3810
multiservice concentrator and on Cisco 2600 and 3600 series routers. It includes the following sections:
•Caller ID Overview, page 811
•Caller ID Prerequisites Tasks, page 814
•Caller ID Configuration Task List, page 815
To identify the hardware platform or software image information associated with a feature in this
appendix, use the Feature Navigator on Cisco.com to search for information about the feature or refer to
the software release notes for a specific release. For more information, see the “Identifying Supported
Platforms” section in the “Using Cisco IOS Software” chapter.
Caller ID Overview
Caller ID (sometimes called CLID or ICLID for incoming call line identification) is an analog service
offered by a central office (CO), which supplies calling party information to subscribers. Typically, the
calling party number, and sometimes the name, appears on a station (also called extension) device such
as a PC telephony software application screen or the display on a telephone. Type 1 caller ID provides
the calling party information while the call is ringing, and Type 2 caller ID provides the additional
convenience of calling number display while the recipient is on another call. In this release, Cisco
provides only Type 1 caller ID support.
The caller ID feature supports the sending of calling party information from foreign exchange station
(FXS) loop-start and ground-start ports into a caller ID equipped telephone device. The FXS port
emulates the extension interface of a private-branch exchange (PBX) or the subscriber interface for a CO
switch.
The caller ID feature supports receiving calling-party information at foreign exchange office (FXO)
loop-start and ground-start ports. The FXO port emulates a connection to a telephone and allows
connection to a PBX extension interface or (where regulations permit) a CO subscriber line.
The following are benefits of using caller ID:
•Enterprises—Caller ID is invaluable for increasing efficiency through its use in computer telephony
integration (CTI) applications, where for example, calling party information can be used to retrieve
client information from a database when a customer call is received.

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•Service Provider—In traditional telephony, caller ID is a standard service that service provider
customers expect. With the Cisco support for caller ID, service providers can offer the feature for
packet-switched Voice over IP (VoIP), Voice over Frame Relay (VoFR), and Voice over ATM
(VoATM) services.
Calling Name and Number
Figure 130 shows a hypothetical topology where users, indicated by telephone icons, receive different
types of caller-ID support depending upon whether the caller-ID information from the caller passes
through an FXO or FXS port before reaching the party who receives the call.
Figure 130 Caller ID and ANI Support
Table 56 shows how caller-ID information is received by the users in Figure 130 as follows:
•When an outbound caller-ID call is carried by a trunk with E&M or R2 signaling, the recipient sees
only the ANI calling number of the caller.
•When caller-ID information is sent from an originating FXS station by way of the PSTN, the
recipient sees only the identification of the FXO port through which the call is routed.
•When caller-ID information is sent from an originating station over a trunk with E&M or R2
signaling and through the PSTN, the recipient sees only the trunk identification because the ANI
information is not preserved by the PSTN.
User A
User E
User D
FXS
FXS
FXS
FXS
PBX
Trunk
(E&M/R2)
Trunk
Trunk (with ANI support)
FXS
FXO 408 555-1111
408 555-2222
FXO
User B
User G
User C
User F
PSTN
VoIP, VoFR,
or VoATM
VoIP, VoFR,
or VoATM
31460

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Call Time Display
When caller-ID information is sent, the local time set on the router is transmitted with the station name
and number. If a call received on an FXO port is terminated on an FXS port, the calling time received
on the FXO port is replaced by the local time while transmitting caller ID to the FXS port. This is also
true for calls received from thenetwork. The router should be configured to retrieve network time at boot
up from an NTP server in order to maintain the correct local time setting.
For more information about voice configuration, refer to the following:
•Cisco IOS IP Routing Configuration Guide
•Cisco IOS Wide-Area Networking Configuration Guide
The following online feature documentation and installation guides describe the configuration and
installation of hardware components:
•For information about installing Cisco MC3810 multiservice concentrators, see Cisco MC3810
Multiservice Concentrator Hardware Installation at the following location:
http://www.cisco.com/univercd/cc/td/doc/product/access/multicon/3810hwig/index.htm
•For information about installing Cisco 2600 series routers, see the documents listed at the following
location: http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis2600/index.htm
•For information about installing Cisco 3600 series routers, see the documents listed at the following
location: http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/cis3600/index.htm
Table 56 Caller-ID Information Received
User
Originating
Call
User
Receiving
Call Caller-ID Information Received
A D D receives the caller ID of the PSTN subscriber line only (408 555-1111).
D A A receives the calling number and name of D, provided that the PSTN
subscriber line (408 555-1111) is enabled for Caller ID.
D B B receives the calling number and name of D, provided that the PSTN
subscriber line (408 555-1111) is enabled for Caller ID.
B D D receives the caller ID of the PSTN subscriber line only (408 555-2222).
B E E receives the Calling Number and Name string of B.
B G G receives the Calling Number and Name string of B.
E B B receives the Calling Number and Name string of E.
F C C receives the Calling Number of F.
C F Calling Number of C.
D C C Receives Calling Number of D through ANI.
C D Calling Number of C goes through ANI to the PSTN. However, the PSTN
displays only the trunk ID, so D sees only this information.
C F The information that F receives depends on the PBX features available.

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Caller ID Prerequisites Tasks
The following hardware, software, and basic configurations are required to support caller ID:
•Cisco IOS Release 12.1(3)T software.
•Caller ID service from your service provider.
•A working network. For more information, see the following publications:
– Cisco IOS Cisco IOS IP Routing Configuration Guide
– Cisco IOS Wide-Area Networking Configuration Guide
•Your company’s dial plan.
•A working telephony network based on your company’s dial plan:
•If applicable to your network, install a 2-channel analog plain old telephone service (POTS) FXS
voice interface card (VIC) in a Cisco 2600 series chassis slot or Cisco 2600 or 3600 network module.
•If applicable to your network, install one of the following Cisco MC3810 multiservice concentrator
FXO network modules:
– MC3810-APM-FXO (generic); caller ID is supported in versions v04.xx and later of this APM.
– MC3810-FXO-PR2 (Pacific Rim 2); caller ID is supported in versions v02.xx and later of this
APM.
– MC3810-FXO-PR3 (Pacific Rim 3); caller ID is supported in versions v02.xx and later of this
APM.
– MC3810-FXO-UK (UK); caller ID is supported in versions v03.xx and later of this APM.
– MC3810-FXO-GER (Germany); caller ID is supported in versions v03.xx and later of this
APM.
•For a Cisco MC3810 multiservice concentrator, install an HCM as follows:
– An HCM2 to supply 4 or 8 voice or fax channels at high or medium codec complexity.
– An HCM6 to supply 12 or 24 voice or fax channels at high or medium codec complexity.
•For information about installing Cisco MC3810 multiservice concentrator HCMs, refer to Cisco
MC3810 Multiservice Concentrator Hardware Installation at the following url:
http://www.cisco.com/univercd/cc/td/doc/product/access/multicon/3810hwig/index.htm
Note The Cisco MC3810 multiservice concentrator voice-compression module does not
support caller ID. Install an HCM instead.
•One other network module or WAN interface card to provide the connection to the LAN or WAN.
Note Specific hardware is required to provide full support for the Caller ID features. To
determine support for these features in your configuration, review the appropriate hardware
documentation and data sheets. This information is available on Cisco.com.

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Caller ID Configuration Task List
Voice-port configuration is the only special configuration required to support caller ID. To configure
your voice network fully, use the reference information in the section “Caller ID Prerequisites Tasks”
section on page 814 to perform the following tasks on your routers:
•Configure your IP, ATM, or Frame Relay network to support real-time voice traffic.
•Configure voice cards for codec settings.
•Configure voice dial peers. Each dial peer defines the characteristics associated with a call leg.
The remainder of this section describes the steps required to configure caller ID on FXS and FXO voice
ports.
Configuring Voice Ports to Support Caller ID
To configure voice ports to support caller ID, use the following commands beginning in global
configuration mode:
Command Purpose
Step 1 Router(config)# voice-port slot/port
or
Router(config)# voice-port
slot-number/subunit-number/port
Enters voice-port configuration mode on a
Cisco MC3810 multiservice concentrator. The slot
number for analog voice ports on the Cisco
MC3810 multiservice concentrator is always 1.
There is no port 0 for voice ports.
Enters voice-port configuration mode on a
Cisco 2600 or 3600 series router.
Step 2 Router(config-voiceport)# connection {plar | tie-line
| plar-opx} digits {trunk digits [answer-mode]} Specifies the voice-port connection type and the
destination telephone number. The keywords and
arguments are as follows:
•plar—Specifies private line automatic
ringdown.
•tie-line—Specifies a tie-line connection to a
PBX.
•plar-opx—Specifies a PLAR off-premises
extension (the local voice port provides a local
response before the remote voice port receives
an answer).
•trunk—Specifies a straight tie-line
connection to a PBX.
•answer-mode—Indicates whether a trunk
connection is specified. The router should not
attempt to initiate a trunk connection, but
should wait for an incoming call before
establishing the trunk.
•digits—Specifies the destination telephone
number.

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The following table lists the options that may be used for the locale variable with the cptone command.
Step 3 Router(config-voiceport)# voice confirmation-tone Enables the two-beep confirmation tone that a
caller hears when picking up the handset, if
connection plar or connection plar-opx is
configured.
Step 4 Router(config-voiceport)# dial-type {dtmf | pulse}(For FXO ports only) Selects the appropriate dial
type for out-dialing.
Step 5 Router(config-voiceport)# signal {loop-start |
ground-start}Selects the appropriate signal type for this
interface.
Step 6 Router(config-voiceport)# codec {g729r8 | g729ar8 |
g726r32 | g711alaw | g711ulaw}(Cisco MC3810 multiservice concentrator only)
Configures the voice-port compression mode. The
g729ar8 value is the default and is recommended.
Note On Cisco 2600 and 3600 series routers,
codec configuration is performed on dial
peers. On all supported routers, codec
command options may vary depending
upon the voice card settings.
Step 7 Router(config-voiceport)# cptone locale Selects the appropriate voice call progress tone for
this interface. Caller ID requires this setting. The
caller ID standard (Bellcore/Telcordia, ETSI,
ETSI-DTMF) is determined by this command.
On the Cisco MC3810 multiservice concentrator,
the default setting for locale is northamerica. On
Cisco 2600 and 3600 series routers, the default
setting for locale is us.
See Table 57 on page 816 for a list of options.
Step 8 Router(config-voiceport)# ring frequency {25 | 50}(Required on Cisco 2600 and 3600 series routers
FXS ports only) Selects the appropriate ring
frequency (in hertz) specific to the equipment
attached to this voice port.
Step 9 Router(config-voiceport)# caller-id attenuation
attenuation (Optional on FXO ports only) Specifies an
attenuation other than the default of 14 dB (minus
14 dBm), enter a value of from 0 to 64, in decibels.
Step 10 Router(config-voiceport)# ring number number (Required on Cisco 2600 and 3600 series routers
FXO ports only) Specifies the maximum number
of rings to be detected before answering a call.
Command Purpose
Table 57 cptone Command Entries for the Cisco 2600 and 3600 Series
Command Option Country Command Option Country
ar Argentina lu Luxembourg
au Australia my Malaysia
at Austria mx Mexico
be Belgium nl Netherlands

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br Brazil nz New Zealand
ca Canada no Norway
cn China pe Peru
co Colombia ph Philippines
cz Czech Republic pl Poland
dk Denmark pt Portugal
fi Finland ru Russian Federation
fr France sg Singapore
de Germany sk Slovakia
gr Greece si Slovenia
hk Hong Kong za South Africa
hu Hungary es Spain
is Iceland se Sweden
in India ch Switzerland
id Indonesia tw Taiwan
ie Ireland th Thailand
il Israel tr Turkey
it Italy gb Great Britain
jp Japan us United States
kr Korea Republic ve Venezuela
Table 57 cptone Command Entries for the Cisco 2600 and 3600 Series (continued)
Command Option Country Command Option Country

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Configuring FXS and FXO Voice Ports to Support Caller ID
To configure caller-ID on FXS and FXO voice ports, use the following commands beginning in global
configuration mode:
Command Purpose
Step 1 Router(config)# caller-id enable Enables caller ID. This command applies to FXS
voice ports that send caller-ID information and to
FXO ports that receive it. By default caller ID is
disabled.
Note If the station-id or a caller-id alerting
command is configured on the voice port,
these automatically enable caller ID, and the
caller-id enable command is not necessary.
Step 2 Router(config-voiceport)# station-id name name Configures the station name on FXS voice ports
connected to user telephone sets. This sets the
caller-ID information for on-net calls originated by
the FXS port. You can also configure the station name
on an FXO port of a router for which incoming Caller
ID from the PSTN subscriber line is expected. In this
case, if no caller-ID information is included on the
incoming PSTN call, the call recipient receives the
information configured on the FXO port instead. If
the PSTN subscriber line does provide caller-ID
information, this information is used and the
configured station name is ignored.
The name argument is a character string of 1 to 15
characters identifying the station.
Note This command applies only to caller-ID calls,
not Automatic Number Identification (ANI)
calls. ANI supplies calling number
identification only.

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Step 3 Router(config-voiceport)# station-id number number Configure the station number on FXS voice ports
connected to user telephone sets. This sets the
caller-ID information for on-net calls originated by
the FXS port.
You can also configure the station number on an FXO
port of a router for which incoming caller ID from the
PSTN subscriber line is expected. In this case, if no
caller-ID information is included on the incoming
PSTN call, the call recipient receives the information
configured on the FXO port instead. If the PSTN
subscriber line does provide caller-ID information,
this information is used and the configured station
name is ignored.
If the caller-ID station number is not provided by
either the incoming PSTN caller ID or by the station
number configuration, the calling number included
with the on-net routed call is determined by Cisco
IOS software by using a reverse dial-peer search. In
this case, the number is obtained by searching for a
POTS dial-peer that refers to the voice-port and the
destination-pattern number from that dial-peer is
used.
number is a string of 1 to 15 characters identifying the
station telephone or extension number.
Step 4 Router(config-voiceport)# caller-id block (FXS ports only) When this command is configured at
the originating end of a call, it requests that the
originating calling party information not be displayed
at the called party's telephone.
Note The calling party information is included in
the routed on-net call, as this is often required
for other purposes, such as billing and call
blocking. The request to block display of the
calling party information on terminating FXS
ports will normally be accepted by Cisco
routers, but no guarantee can be made
regarding the treatment by other equipment.
This command affects all calls sent to an FXO station
from the configured FXS station. The central office
(CO) may supply a feature code that a user can dial in
order to block caller-ID transmission on a call-by-call
basis.
When a blocked-information call passes through an
FXO interface on the way to its destination, the
blocking is passed on to the receiving party.
Command Purpose

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To configure the alerting method, use the following commands beginning in global configuration mode.
Configuration of the alertingmethod is requiredwhen the caller ID standard, specified by locale through
the cptone command, is other than Bellcore/Telcordia (if you do not configure the alerting method, the
default caller-id alerting ring 1 command is applied). The command that you enter is determined by the
Bellcore/Telcordia or ETSI standard that your service provider uses for caller ID. For more information
about standards, see the Caller ID Prerequisites Tasks, page 814 section.
Command Purpose
Step 1 Router(config)# voice-port slot/port
or
Router(config)# voice-port
slot-number/subunit-number/port
Enters voice-port configuration mode on a Cisco
MC3810 multiservice concentrator. The slot
number for analog voice ports on the Cisco
MC3810 multiservice concentrator is always 1.
There is no port 0 for voice ports.
Enters voice-port configuration mode on a Cisco
2600 or 3600 series router.
Step 2 Router(config-voiceport)# caller-id
alerting ring {1| 2}Configure this command on FXO ports where
caller ID information is received from a subscriber
telephone line. and on FXS voice ports from which
caller ID information is transmitted to an attached
telephone device.
Compatible settings are required on both ends of
the telephone line connection or caller ID
information may not be displayed.
Enter 1if your telephone line service provider or
telephone device specifies it, to provide or expect
caller ID information following the first ring at the
receiving station. This is the default setting.
Enter 2 to provide or expect caller-ID information
during the long ring pause following two short
rings. This setting is used in Australia and the
United Kingdom.
Step 3 Router(config-voiceport)# caller-id alerting
line-reversal (FXS ports only) Configure this setting only when
the attached telephone device requires line polarity
reversal to signal the start of caller-ID information
transmission.

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Step 4 Router(config-voiceport)# caller-id alerting
dsp-pre-alloc (FXO ports, only when caller-ID alerting
line-reversal is required) Configure this command
on the FXO port when the incoming subscriber
telephone line uses line polarity reversal to signal
the start of caller-ID information transmission.
The Cisco FXO interface cannot detect
line-reversal alerting in the on-hook state. For this
reason, DSPs must be pre-allocated to serve the
Type 1 caller ID information when it arrives.
Preallocating the DSPs enables the DSP to
continuously monitor for the arrival of caller-ID
information.
Step 5 Router(config-voiceport)# caller-id alerting pre-ring (FXS ports only) Configure this setting only when
the attached telephone device requires the pre-ring
(immediate ring) method to signal the start of a
caller ID information. The command activates a
250-ms pre-ring.
Command Purpose

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Verifying Caller ID on Voice Ports Configuration
To verify voice-port configuration, enter the show voice-port command. You can specify a voice port or
view the status of all configured voice ports. In the following example, the specified Cisco MC3810
multiservice concentrator FXS port is configured with a Bellcore/Telcordia standard (cptone value is
northamerica), a station name, and a station number. The caller-id alerting ring setting is 1.
Router> show voice port 1/1
FXS 1/1 Slot is 1, Port is 1
Type of VoicePort is FXS
Operation State is UP
Administrative State is UP
No Interface Down Failure
Description is not set
Noise Regeneration is enabled
Non Linear Processing is enabled
Music On Hold Threshold is Set to -38 dBm
In Gain is Set to 0 dB
Out Attenuation is Set to 0 dB
Echo Cancellation is enabled
Echo Cancel Coverage is set to 8 ms
Connection Mode is normal
Connection Number is not set
Initial Time Out is set to 10 s
Interdigit Time Out is set to 10 s
Ringing Time Out is set to 180 s
Companding Type is u-law
Coder Type is g729ar8
Voice Activity Detection is disabled
Nominal Playout Delay is 80 milliseconds
Maximum Playout Delay is 160 milliseconds
Region Tone is set for US
Analog Info Follows:
Currently processing Voice
Maintenance Mode Set to None (not in mtc mode)
Number of signaling protocol errors are 0
Impedance is set to 600r Ohm
Wait Release Time Out is 30 s
Analog interface A-D gain offset = -3.0 dB
Analog interface D-A gain offset = -3.0 dB
FXS idle voltage set to low
Caller ID Info Follows:
Standard BELLCORE
Station name A. Person, Station number 4085551111
Caller ID presentation unblocked
Output attenuation is set to 14 dB
Caller ID is transmitted after 1 rings
Voice card specific Info Follows:
Signal Type is loopStart
Ring Frequency is 20 Hz
Hook Status is Off Hook
Ring Active Status is inactive
Ring Ground Status is inactive
Tip Ground Status is active
Digit Duration Timing is set to 100 ms
InterDigit Duration Timing is set to 100 ms
Ring Cadence is defined by CPTone Selection
Ring Cadence are [20 40] * 100 msec
InterDigit Pulse Duration Timing is set to 500 ms

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Troubleshooting Tips
If you have caller-ID problems on telephones connected to FXS ports, the following tips may be helpful:
•Try a different brand of phone to confirm that the problem is not caused by a malfunctioning or
incompatible caller ID telephone.
•Ensure that the cptone command is set correctly to reflect your locale.
•If the call time display is incorrect, check the router clock setting. An NTP network time server is
recommended for accurate display of the local time.
•If expected information is not displayed, use the show call history command to make sure that the
information that the router received during the call setup is complete.
•The line voltage available on FXS voice ports of the Cisco MC3810 multiservice concentrator and
Cisco 2600 and 3600 series routers is –24V. Some phones, particularly those manufactured by Bell
South, do not recognize –24V caller-ID signaling. On a Cisco MC3810 multiservice concentrator,
use the idle-voltage high voice-port configuration command to boost the voltage on an FXS port.
If you have caller-ID display problems on FXO ports, the following tips may be helpful:
•Disconnect the router from the phone line and attach a caller-ID equipped telephone to verify that
the CO is sending caller-ID information:
– Listen and watch to see when the caller-ID information is displayed: before the first ring, after
the first ring, or after the second ring?
– Make sure that the router configuration matches the timing of the display. If the phone is
answered during the first ring, does this cause the phone not to display the caller-ID
information? If so, the CO may be sending the caller-ID information after the first ring,
requiring a change to a caller-ID alerting setting. Make sure the router is not configured to
answer the call on the FXO before the Caller ID-information is received. If needed, increase the
number of rings required before answering.
•Use the show call history command to check the information received by the caller ID receiver.
The following debug commands may be useful for analyzing problems:
•debug vpm signal
•debug vtsp dsp
•debug vtsp session
Note Specific hardware is required to provide full support for the Caller ID features. To
determine supportfor these features in your configuration, review the appropriate hardware
documentation and data sheets. This information is available on Cisco.com.

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