Fax, Modem, and Text Support over IP Configuration Guide, Cisco IOS Release 15M&T
Monitoring of Modem Call Status
Monitoring of Modem Call Status
Last Updated: December 4, 2012
This appendix describes configuration for modem call status. Modem call status provides monitoring and maintaining of modem calls at digital signal level zero (DS-0), the PRI bearer channel level, and the modem level.
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Prerequisites for Configuring Modem Call Status
Before configuring your access server or gateway to enable monitoring of modem call status, perform the following tasks:
snmp-server community public RO snmp-server host 10.1.2.3 public
Information about Modem Call Status
Modem call status is supported by:
Monitoring and maintaining of modem call status offers the following benefits:
DS-0 Busyout Traps
A DS-0 busyout trap is generated when one of the following conditions is met:
DS-0 busyout traps are generated at the DS-0 level for channel-associated signalling (CAS) and ISDN configured lines.
ISDN PRI-Requested Channel-Not-Available Traps
ISDN PRI-requested channel-not-available traps are generated when a requested DS-0 channel is not available or when there is no modem available to take an incoming call. This feature is available only on ISDN PRI interfaces.
Modem Health Traps
Modem health traps are generated when a modem port is bad, disabled, reflashed, or shut down, or when there is a request to busy out the modem.
show controllers timeslots Command
The show controllers command, with the keyword timeslots, displays the channel state in detail. This command shows whether the DS-0 channels of a particular controller are in idle, in-service, maintenance, or busyout states. The show controllers command applies to both CAS and ISDN PRI interfaces.
Configuring Modem Call Status
To configure modem call status on your access server or gateway, perform the following tasks, all of which are optional:
Enabling DS-0 Busyout Traps
To generate DS-0 busyout traps, use the following command in global configuration mode:
Enabling ISDN PRI-Requested Channel-Not-Available Traps
To generate ISDN PRI-requested channel-not-available traps, use the following command in global configuration mode:
Enabling Modem Health Traps
To generate modem health traps, use the following command in global configuration mode:
Enabling DS-1 Loopback Traps
To generate DS-1 loopback traps, use the following command in global configuration mode:
Verifying Enabled Traps
Use the show running-config command to verify that the traps are enabled. The following output indicates that all the traps are enabled:
. Router(config)# show running-config snmp-server enable traps ds0-busyout snmp-server enable traps isdn chan-not-avail snmp-server enable traps modem-health snmp-server enable traps ds1-loopback .
Troubleshooting Enabled Traps
To troubleshoot the traps, enable debugging for SNMP packets by entering the debug snmp packets command in privileged EXEC mode. Check the resulting output to see that the SNMP trap information packet is being sent. The output will vary according to the kind of packet sent or received.
The following example shows the debug snmp packetscommand followed by an excerpt from the debug output. The first and last lines of the sample output show SNMP trap packets that have been sent and received.
Router# debug snmp packets SNMP: Packet received via UDP from 10.5.4.1 on Ethernet0 SNMP: Get-next request, reqid 23584, errstat 0, erridx 0 sysUpTime = NULL TYPE/VALUE system.1 = NULL TYPE/VALUE system.6 = NULL TYPE/VALUE SNMP: Response, reqid 23584, errstat 0, erridx 0 sysUpTime.0 = 2217027 system.1.0 = Cisco Internetwork Operating System Software system.6.0 = SNMP: Packet sent via UDP to 10.5.4.1
You can also use trap monitoring and logging tools such as snmptrapd with debugging flags turned on to monitor output.
Modem Call Status Configuration Example
The following example shows modem call status configured with DS-0 busyout traps enabled:
version 12.2 service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname router ! aaa new-model aaa authentication ppp default group radius enable password <password> ! spe 1/0 1/7 firmware location system:/ucode/mica_port_firmware spe 2/0 2/7 firmware location system:/ucode/mica_port_firmware ! resource-pool disable ! clock timezone PDT -8 clock calendar-valid no modem fast-answer modem country mica usa modem link-info poll time 60 modem buffer-size 300 ip subnet-zero ! isdn switch-type primary-5ess isdn voice-call-failure 0 ! controller T1 0 framing esf clock source line primary linecode b8zs pri-group timeslots 1-24 ! controller T1 1 framing esf linecode b8zs ds0-group 0 timeslots 1-24 type e&m-fgb cas-custom 0 ! interface Loopback0 ip address 10.5.4.1 ! interface Ethernet0 no ip address shutdown ! interface Serial0 no ip address shutdown ! interface Serial1 no ip address shutdown ! interface Serial0:23 no ip address ip mroute-cache isdn switch-type primary-5ess isdn incoming-voice modem no cdp enable ! interface FastEthernet0 ip address 10.5.4.1 duplex full speed auto no cdp enable ! interface Group-Async1 ip unnumbered FastEthernet0 encapsulation ppp ip tcp header-compression passive no ip mroute-cache async mode interactive peer default ip address pool swattest no fair-queue ppp authentication chap ppp multilink group-range 1 192 ! interface Dialer1 ip unnumbered FastEthernet0 encapsulation ppp ip tcp header-compression passive dialer-group 1 peer default ip address pool swattest pulse-time 0 no cdp enable ! ip local pool swattest 10.5.4.1 ip default-gateway 10.5.4.1 ip classless ! dialer-list 1 protocol ip permit snmp-server engineID local 00000000DDDDDDDDFFFFFFFF snmp-server community public RO snmp-server packetsize 2048 snmp-server enable traps pop snmp-server host 10.5.4.1 public ! radius-server host 10.5.4.1 auth-port 1645 acct-port 1646 radius-server retransmit 3 radius-server key <password> ! line con 0 transport input none line 1 192 autoselect ppp modem InOut transport preferred none transport input all transport output none line aux 0 line vty 0 4 end
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