Voice over IP for the Cisco AS5800 The Voice over IP for the Cisco AS5800 feature adds Voice over IP carrier-class gateway functionality to the Cisco AS5800 platform.
Feature Overview Benefits Two-Stage-Dial Toll Bypass With Voice over IP on the Cisco AS5800, you can leverage your network’s WAN infrastructure to offer long distance toll bypass services. Toll bypass occurs in two stages. For example, customers can be assigned an account number and a Personal Identification Number (PIN). When a user dials a local number or a 1-800-Internet Telephone Service Provider (ITSP) number, she connects to the local VoIP point of presence.
Benefits Figure 1 Two-Stage Dial Toll Bypass Gatekeeper Zone A Gatekeeper Zone B QoS WAN Cisco gatekeeper Cisco gatekeeper RAS RAS RAS H.225/H.
Feature Overview VoIP Used as a PSTN Gateway to Off load Voice Traffic and Fax Traffic Local Exchange Carrier Local Exchange Carrier T1 ISDN PRI Cisco AS5800 T1 ISDN PRI WAN Cisco AS5800 30744 Figure 2 Universally Accessible Voice-Mail and Fax-Mail Services VoIP on the Cisco AS5800 can be used to leverage the technology prefixes feature.
Supported Platforms • • • • Voice, Video, and Home Applications Command Reference, Cisco IOS Release 12.0 Quality of Service Configuration Guide, Cisco IOS Release 12.0 Quality of Service Command Reference, Cisco IOS Release 12.0 Voice over IP for the Cisco AS5800 Software Configuration Guide, Cisco IOS Release 12.0(4)XL.
Prerequisites Prerequisites Before you can configure your Cisco AS5800 to use Voice over IP, you must first: • Install a version of the Cisco IOS software that supports DSPWare 3.1.7 specific to the Cisco AS5800 (for example, Cisco IOS Release 12.0(4)XL or Cisco IOS Release 12.0(7)T). • Establish a working IP network. For more information about configuring IP, refer to the “IP Overview,” “Configuring IP Addressing,” and “Configuring IP Services” chapters in the Cisco IOS 12.
Configuration Tasks • Integrate your dial plan and telephony network into your existing IP network topology. Merging your IP and telephony networks depends on your particular IP and telephony network topology. In general, we recommend the following suggestions: — Use canonical numbers wherever possible. It is important that you avoid situations where numbering systems are significantly different on different routers or access servers in your network. — Make routing and dialing transparent to the user.
Configuration Tasks same operations; the QoS tasks they perform might also differ. To configure your IP network for real-time voice traffic, you need to consider the functions of both edge and backbone routers in your network, then select the appropriate QoS tool or tools.
Configuring Voice Ports To configure basic ISDN parameters for Voice over IP on the Cisco AS5800, perform the following steps: Step Command Purpose 1 Router(config)# isdn switch-type switch-type Defines the telephone company’s switch type. 2 Router(config)# controller T1 1/0/0 or Router(config)# controller T1 1/0/0:1 Enables the T1 0 controller on the T1 card and enters controller configuration mode, or 3 Router(config)# framing esf Defines the framing characteristics.
Configuration Tasks Step Command Purpose 3 Router(config-voiceport)# cptone country Selects the appropriate voice call progress tone for this interface. The default for this command is us. For a list of supported countries, refer to the Multiservice Applications Command Reference. 4 Router(config-voiceport)# compand-type {a-law|u-law} Selects a companding type for this voice port.
Configuring Voice Ports Step Command Purpose 10 Router(config-voiceport)# timeouts interdigits seconds Specifies the number of seconds the system will wait (after the caller has input the initial digit) for the caller to input a subsequent digit. Valid entries for this command are from 0 to 120. 11 Router(config-voiceport)# timeouts ringing {seconds|infinity} Specifies the number of seconds the system will continue to ring the destination if there is no answer.
Configuration Tasks Configuring Dial Peers The key point to understanding how VoIP functions is to understand dial peers. Each dial peer defines the characteristics associated with a call leg, as shown in Figure 3 and Figure 4. A call leg is a discrete segment of a call connection that lies between two points in the connection. All of the call legs for a particular connection have the same connection ID.
Configuring Dial Peers POTS peers associate a telephone number with a particular voice port so that incoming calls for that telephone number can be received and outgoing calls can be placed. VoIP peers point to specific devices (by associating destination telephone numbers with a specific IP address) so that incoming calls can be received and outgoing calls can be placed. Both POTS and VoIP peers are needed to establish VoIP connections.
Configuration Tasks prefix, “9,” to the front of the remaining numbers, so that the actual numbers dialed is “9, 2222.” The comma in this example means that the router will pause for one second between dialing the “9” and the “2” to allow for a secondary dial tone. Direct Inward Dial for POTS Peers Direct inward dial (DID) is used to determine how the called number is treated for incoming POTS call legs. As shown in Figure 5, incoming means from the perspective of the router.
Configuring Dial Peers Using the elements, the algorithm is as follows: For all peers where call type (VoIP versus POTS) match dial peer type: if the type is matched, associate the called number with the incoming called-number else if the type is matched, associate calling-number with answer-address else if the type is matched, associate calling-number with destination-pattern else if the type is matched, associate voice port to port This algorithm shows that if a value is not configured for answer-addres
Configuration Tasks Step Command Purpose 1 Router(config)# dial-peer voice number pots Enter the dial peer configuration mode to configure a POTS peer. 2 Router(config-dial-peer)# incoming called-number number Specify direct inward dial for this POTS peer. Configuring VoIP Peers VoIP peers enable outgoing calls to be made from a particular telephony device.
Configuring the Cisco AS5800 as an H.323 Gateway • Use the show dialplan number command on the local and remote routers to verify that the data is configured correctly on both. • If you have configured number expansion, use the show num-exp command to check that the partial number on the local router maps to the correct full E.164 telephone number on the remote router.
Configuration Tasks Verifying Gateway Interface Configuration Use the show gateway command to find the current registration information and status of the gateway. Configuring the Cisco AS5800 for Interactive Voice Response The Interactive Voice Response (IVR) Service Provider application provides IVR capabilities using Tool Command Language (TCL) scripts. For example, an IVR script is played when a caller receives a voice-prompt instruction to enter a specific type of information, such as a PIN.
Configuration Example Step Command Purpose 4 Router(config-dial-peer)# destination-pattern string Defines the telephone number associated with this POTS dial peer. 5 Router(config-dial-peer)# port shelf/slot/port:D Associates this POTS dial peer with a specific logical dial interface. 6 Router(config-dial-peer)# prefix string (Optional) Specifies the prefix for this POTS dial peer.
Configuration Example Configuring the Cisco 3640 as a Gatekeeper ! Configure the Ethernet interface to be used at the gatekeeper interface. interface Ethernet0/1 ip address 172.30.00.00 255.255.255.0 no ip directed-broadcast no logging event link-status no keepalive ! ! Configure the gatekeeper interface and enable the interface. gatekeeper zone local gk3.gg-dn1 gg-dn1 173.50.00.00 zone prefix gk3.gg-dn1 21* gw-type-prefix 9#* gw ipaddr 173.60.0.0 1720 gw-type-prefix 6#* gw ipaddr 173.60.0.
Command Reference ! dial-peer voice 12345 voip destination-pattern 12345 tech-prefix 6# session target ras ! ! Enable gateway functionality. gateway ! ! Enable Cisco Express Forwarding. ip cef ! ! Configure and enable the gateway interface. interface FastEthernet0/3/0 ip address 173.60.0.0.255.255.255.0 no ip directed-broadcast no keepalive full-duplex no cdp enable h323-gateway voip interface h323-gateway voip id gk3.gg-dn1 ipaddr 173.30.0.
Command Reference Modified Commands • • • • • codec port show csm show voice port voice-port In Cisco IOS Release 12.0(1)T or later, you can search and filter the output for show and more commands. This functionality is useful when you need to sort through large amounts of output, or if you want to exclude output that you do not need to see.
codec codec To specify the voice coder rate of speech for a dial peer, use the codec dial-peer configuration command. To restore the default voice coder rate of speech value, use the no form of this command. codec {g711alaw | g711ulaw | g723r53 | g723r63 | g726r16 | g726r24 | g726r32 | g728 | g729abr8 | g729ar8 | g729br8 | g729r8 | gsmfr} no codec Syntax Description g711alaw G.711 A-Law 64000 bits per second (bps). g711ulaw G.711 u-Law 64000 bps. g723r53 G.723.1 5300 bps. g723r63 G.723.1 6300 bps.
Command Reference Command History Release Modification 11.3(1)T This command was introduced. 11.3(3)T Support for Cisco 2600 series routers was added. 12.0(3)T Support for the Cisco AS5300 access server was added. 12.0(7)T Additional voice coder rates of speech were added. Usage Guidelines For toll quality, use the g711alaw or g711ulaw values. These values provide high-quality voice transmission but use a significant amount of bandwidth.
dtmf-relay dtmf-relay To specify how an H.323 gateway relays dual tone multifrequency (DTMF) tones between telephony interfaces and an IP network, use the dtmf-relay dial-peer configuration command. To remove all signaling options and transmit the DTMF tones as part of the audio stream, use the no form of this command.
Command Reference The principal advantage of the dtmf-relay command is that it transmits DTMF tones with greater fidelity than is possible in-band for most low-bandwidth CODECs, such as G.729 and G.723. Without the use of DTMF relay, calls established with low-bandwidth CODECs may have trouble accessing automated DTMF-based systems, such as voice-mail, menu-based ACD systems, and automated banking systems.
port port To associate a dial peer with a specific voice port, use the port dial peer configuration command. To cancel this association, use the no form of this command.
Command Reference Command Mode Dial-peer configuration Command History Release Modification 11.3(1)T This command was introduced (Cisco 3600 series router). 11.3(3)T Port-specific values for the Cisco 2600 were added. 11.3 MA Port-specific values for the Cisco MC3810 were added. 12.0(3)T Port-specific values for the Cisco AS5300 were added. 12.0(7)T Port-specific values for the Cisco AS5800 were added.
show csm show csm To display the call switching module (CSM) statistics for a particular or all DSP channels or for a specific modem or DSP channel, use the show csm privileged EXEC command. Cisco AS5300 Access Server show csm {modem [slot/port | modem-group-number] | voice [slot/dspm/dsp/dsp-channel]} Cisco AS5800 Universal Access Server show csm voice [shelf/slot/port] Syntax Description modem Specifies CSM call statistics for modems. voice Specifies CSM call statistics for DSP channels.
Command Reference Use the show csm modem command to display the CSM call statistic information for a specific modem, for a group of modems, or for all modems. If a slot/port argument is specified, then CSM call statistics are displayed for the specified modem. If the modem-group-number argument is specified, the CSM call statistics for all of the modems associated with that modem group are displayed. If no keyword is specified, CSM call statistics for all modems on the AS5300 are displayed.
show csm The following is sample output from the Cisco AS5800 for the show csm voice command: 5800# show csm voice 1/8/19 shelf 1, slot 8, port 19 VDEV_INFO:slot 8, port 19 vdev_status(0x00000401):VDEV_STATUS_ACTIVE_CALL.VDEV_STATUS_HASLOCK.
Command Reference Table 1 show csm voice Field Descriptions (continued) Field Description device_status The status of the device. Possible values are: — VDEV_STATUS_UNLOCKED—Device is unlocked (meaning that it is available for new calls). — VDEV_STATUS_ACTIVE_WDT—Device is allocated for a call and the watchdog timer is set to time the connection response from the central office. — VDEV_STATUS_ACTIVE_CALL—Device is engaged in an active, connected call.
show csm Table 1 show csm voice Field Descriptions (continued) Field Description csm_state CSM call state of the current call (PRI line) associated with this device. Possible values are: — CSM_IDLE_STATE—Device is idle. — CSM_IC_STATE—A device has been assigned to an incoming call. — CSM_IC1_COLLECT_ADDR_INFO—A device has been selected to perform ANI/DNIS address collection for this call. ANI/DNIS address information collection is in progress.
Command Reference Table 1 34 show csm voice Field Descriptions (continued) Field Description wait_for_bchan: Indicates whether this (outgoing) call is waiting for a B channel to send the call out on. pri_chnl= Indicates which type of TDM stream is used for the PRI connection. For PRI and CAS calls, it will always be TDM_PRI_STREAM. tdm_chnl= Indicates which type of TDM stream is used for the connection to the device used to process this call.
show csm Related Commands Command Description show call active voice Displays the Voice over IP active call table. show call history voice Displays the Voice over IP call history table. show num-exp Displays how the number expansions are configured in Voice over IP. show voice port Displays configuration information about a specific voice port.
Command Reference show voice port To display configuration information about a specific voice port, use the show voice port privileged EXEC command.
show voice port For the Cisco MC3810: slot/port (Optional) Displays information for only the voice port you specify with the slot/port designation. The slot variable specifies the slot number in the Cisco router where the voice interface card is installed. The only valid entry is 1. The port variable specifies the voice port number. Valid ranges are as follows: Analog voice ports: from 1 to 6. Digital voice port: Digital T1: from 1 to 24. Digital E1: from 1 to 15, and from 17 to 31.
Command Reference Command History Release Modification 11.3(1)T This command was introduced. 11.3 MA Port-specific values for the Cisco MC3810 were added. 12.0(3)T Port-specific values for the Cisco AS5300 were added. 12.0(7)T Port-specific values for the Cisco AS5800 were added. Usage Guidelines This command applies to Voice over IP, Voice over Frame Relay, Voice over ATM, and Voice over HDLC.
show voice port Wink Duration Timing is set to 0 ms Delay Start Timing is set to 0 ms Delay Duration Timing is set to 0 ms The following is sample output from the show voice port command for an FXS voice port on the Cisco 3600 series: router# show voice port 1/0/0 Foreign Exchange Station 1/0/0 Slot is 1, Sub-unit is 0, Port is 0 Type of VoicePort is FXS Operation State is DORMANT Administrative State is UP The Interface Down Failure Cause is 0 Alias is NULL Noise Regeneration is enabled Non Linear Proces
Command Reference Voice Activity Detection is disabled Ringing Time Out is 180 s Wait Release Time Out is 30 s Nominal Playout Delay is 80 milliseconds Maximum Playout Delay is 160 milliseconds Analog Info Follows: Region Tone is set for northamerica 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 Analog interface A-D gain offset = -3 dB Analog interface D-A gain offset = -3 dB Voice card specific Info Follows:
show voice port Table 2 show voice port Field Descriptions (continued) Field Description Currently Processing Type of call currently being processed: none, voice, or fax. Delay Duration Timing Maximum delay signal duration for delay dial signaling. Delay Start Timing Timing of generation of delayed start signal from detection of incoming seizure. Description Description of the voice port. Dial Type Out-dialing type of the voice port. Digit Duration Timing DTMF digit duration in milliseconds.
Command Reference Table 2 show voice port Field Descriptions (continued) Field Description Ring Ground Status Ring ground indication. Ringing Time Out Ringing time out duration. Signal Type Type of signaling for a voice port: loop-start, ground-start, wink-start, immediate, and delay-dial. Slot Slot used in the voice interface card for this port. Sub-unit Subunit used in the voice interface card for this port. Tip Ground Status Tip ground indication.
show voice port Table 3 show voice port Field Descriptions for the Cisco AS5800 (continued) Field Description Operations State Operation state of the port. Operation Type Operation of the E&M signal: two-wire or four-wire. Noise Regeneration Whether or not background noise should be played to fill silent gaps if VAD is activated. Non-Linear Processing Whether or not non-linear processing is enabled for this port.
Command Reference show vrm active_calls To display active-only voice calls either for a specific VFC or all VFCs, use the show vrm active_calls privileged EXEC command. show vrm active_calls {dial-shelf-slot-number | all} Syntax Description dial shelf slot number Slot number of the dial shelf. Valid number is 0 to 13. all Lists all active calls for VFC slots. Defaults No default behavior or values. Command Modes Privileged EXEC Command History Release Modification 12.
show vrm active_calls slot = 6 virtual voice dev (tag) = 40 channel id = 2 capabilities list map = 9FFF last/current codec loaded/used = None TDM timeslot = 157 Resource (vdev_common) status = 401 means :active others Table 4 explains the fields in the sample output. Table 4 show vrm vdevice Field Descriptions Field Description slot Slot where voice card is installed. virtual voice dev (tag) Identification number of the virtual voice device.
Command Reference Table 4 show vrm vdevice Field Descriptions (continued) Field Description tot egress control Total number of control packets sent from the VoIP side of the connection to the PSTN side of the connection. tot egress data drops Total number of data packets dropped from the VoIP side of the connection to the PSTN side of the connection. tot egress control drops Total number of control packets dropped from the VoIP side of the connection to the PSTN side of the connection.
show vrm vdevices show vrm vdevices To display detailed information for a specific DSP or a brief summary display for all VFCs, use the show vrm vdevices privileged EXEC command. show vrm vdevices {{vfc-slot-number | voice-device-number} | summary} Syntax Description vfc-slot-number Slot number of the VFC. Valid number is 0 to 11. voice-device-number DSP number. Valid number is 1 to 96. summary List synopsis of voice feature card DSP mappings, capabilities, and resource states.
Command Reference Examples The following is sample output from the show vrm vdevice command specifying dial shelf slot number and DSP number. In this particular example, the call is active so the statistics displayed are for this active call. If no calls are currently active on the device, the statistics would be for the previous (or last active) call.
show vrm vdevices Table 5 show vrm vdevice Field Descriptions (continued) Field Description capability list map Bitmaps for the codec supported on that DSP channel.
Command Reference Table 5 show vrm vdevice Field Descriptions (continued) Field Description tot ingress data drops Total number of data packets dropped from the PSTN side of the connection to the VoIP side of the connection. tot ingress control drops Total number of control packets dropped from the PSTN side of the connection to the VoIP side of the connection. tot egress data Total amount of data (number of packets) sent from the VoIP side of the connection to the PSTN side of the connection.
show vrm vdevices +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 91 16 1 2 0 0 0 92 16 2 2 0 0 0 93 16 3 1 0 0 0 94 16 4 2 0 0 0 95 16 5 2 0 0 0 96 16 6 2 0 0 0 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Total active call channels = 178 Total busied out channels = 0 Total channels in reset = 0 Total bad channels = 0 Note :Channels could be in multiple states Table 6 explains the fields in the sample output.
Command Reference Table 6 show vrm vdevice summary Field Descriptions (continued) Field Description core type Type of DSPware in use: Possible field values are: • 1 = boot loader • 2 = high complexity core • 3 = medium complexity core • 4 = low complexity core trough size This value indirectly represents the complexity of the DSPware in use. slop value This value indirectly represents the complexity of the DSPware in use.
show vrm vdevices Table 6 show vrm vdevice summary Field Descriptions (continued) Field Description loadable codec bitmap Represents the loadable codec bitmap for the loadable CODECs.
Command Reference Related Commands 54 Command Description show vrm active_calls Displays active-only voice calls either for a specific VFC or all VFCs. Cisco IOS Release 12.
test vrm busyout test vrm busyout To busyout a specific DSP or channels on a specific DSP, use the test vrm busyout privileged EXEC command. test vrm busyout slot-number {first-dsp-number {last-dsp-number | {channel number}} | all Syntax Description slot-number Number identifing the slot where the VFC is installed. Values for this field are 0 to 11. first-dsp-number Specifies the first DSP in a range to be busied out. Each VFC holds 96 DSPs, so the value for this argument is 1 to 96.
Command Reference The following example busied out all of the channels from DSP1 to DSP3 for the VFC located in slot 4: router# test vrm busyout 4 1 3 The following example busies out only channel 2 of DSP1 for the VFC located in slot 4: router# test vrm busyout 4 1 channel 2 Related Commands 56 Command Description test vrm unbusyout Restores activity to a busied-out DSP or busied-out channels on a DSP. Cisco IOS Release 12.
test vrm reset test vrm reset To reset a particular DSP, use the test vrm reset privileged EXEC command. test vrm reset {slot-number dsp-number} Syntax Description slot-number Number identifing the slot where the VFC is installed. dsp-number Number identifying the DSP to be reset. Defaults No default behavior or values. Command Modes Privileged EXEC Command History Release Modification 12.0(7)T This command was introduced.
Command Reference test vrm unbusyout To restore activity to a busied-out DSP or busied-out channels on a DSP, use the test vrm unbusyout privileged EXEC command. test vrm unbusyout slot-number {first-dsp-number {last-dsp-number | {channel number}} | all Syntax Description slot-number Number identifing the slot where the VFC is installed. Values for this field are 0 to 11. first-dsp-number Specifies the first DSP in a range to be restored.
test vrm unbusyout The following example restores the activity of all the channels on the DSP from DSP1 to DSP3 for the VFC located in slot 4: router# test vrm unbusyout 4 1 3 The following example restores the activity of only channel 2 of DSP1 for the VFC located in slot 4: router# test vrm unbusyout 4 1 channel 2 Related Commands Command Description test vrm busyout Busies out a DSP or busies out channels on a DSP.
Command Reference voice-port To enter the voice-port configuration mode, use the voice-port global configuration command.
voice-port For the Cisco AS5300 Access Server: controller number Specifies the T1 or E1 controller. :D Indicates the D channel associated with ISDN PRI. For the Cisco AS5800 Universal Access Server: shelf/slot/port Specifies the T1 or E1 controller on the T1 card. Valid entries for the shelf variable is 0 to 9999. Valid entries for the slot value is 0 to 11. Valid entries for the port variable is 0 to 11. shelf/slot/parent:port Specifies the T1 controller on the T3 card.
Command Reference The following example accesses the voice-port configuration mode for digital voice port 24 on a Cisco MC3810 with a DVM installed: configure terminal voice-port 1/24 The following example accesses the voice-port configuration mode for the Cisco AS5300: configure terminal voice-port 1:D The following example accesses the voice-port configuration mode for the Cisco AS5800 (T1 card): configure terminal voice-port 1/0/0:D The following example accesses the voice-port configuration mode for
Debug Commands Debug Commands This section documents new or modified debug commands. All other commands used with this feature are documented in one of the follwing Cisco IOS documentation: • • • • Cisco IOS Release 12.0 Voice, Video, and Home Applications Command Reference Cisco IOS Release 12.0 Dial Soluions Command Reference Cisco IOS Release 12.0(3)T Voice over IP for the AS5300 feature module Cisco IOS Release 12.
Debug Commands debug vrm control To display all control messages sent to and received from the DSP, use the debug vrm control privileged EXEC command. To stop displaying DSP-specific control messages, use the no form of this command. [no] debug vrm control Syntax Description There are no arguments or keywords used in this command. Defaults No default behavior or values. Command History Release Modification 12.0(7)T This command was introduced.
debug vrm control *Nov 22 19:17:51.995: content : 0 0 0 1 0 18 0 1 0 49 0 B 0 1 0 *Nov 22 19:17:54.815: SEND CONTROL slot 4 tag 1 size E *Nov 22 19:17:54.815: content : 0 0 0 1 0 A 0 1 0 53 0 1 0 0 0 *Nov 22 19:17:54.815: SEND CONTROL slot 4 tag 1 size E *Nov 22 19:17:54.815: content : 0 0 0 1 0 A 0 1 0 54 0 1 0 0 0 *Nov 22 19:17:54.815: SEND CONTROL slot 4 tag 1 size E *Nov 22 19:17:54.
Debug Commands Table 7 describes the fields in previous example. Table 7 debug vrm control Field Descriptions Field Description tag# DSP number. len Length of the packet from the RTP header (the next two bytes). chan Channel number (the next two bytes). msg Message ID number (the next two bytes). proc Process ID (the next two bytes). rtp_header First three bytes of the RTP header.
debug vrm error debug vrm error To display all DSP-specific error messages going to the voice resource manager (VRM), use the debug vrm error privileged EXEC command. To stop displaying DSP-specific error messages, use the no form of this command. [no] debug vrm error Syntax Description There are no arguments or keywords used in this command. Defaults No default behavior or values. Command History Release Modification 12.0(7)T This command was introduced.
Debug Commands Possibe status values are as follows: • • • • • • • • • • • • • • • ACTIVE_CALL = 0x0001 BUSYOUT_REQ = 0x0002 BAD = 0x0004 BACK2BACK_TEST = 0x0008 RESET = 0x0010 DOWNLOAD_FILE = 0x0020 DOWNLOAD_FAIL = 0x0040 SHUTDOWN = 0x0080 BUSY = 0x0100 OIR = 0x0200 HASLOCK = 0x0400 /* vdev_pool has locked port */ DOWNLOAD_REQ = 0x0800 RECOVERY_REQ = 0x1000 NEGOTIATED = 0x2000 OOS = 0x4000 The following error message shows that a "set_codec" command was issued, but the codec was not supported by the DS
debug vrm error This error message shows that there is no buffer left in the pool for the VTSP to send a message to the DSP. int his output referst o the number of times the VRM ran out of buffer space.
Debug Commands Related Commands 70 Command Description debug vrm control Displays debug messages for all DSP-specific control messages going to the voice resource manager (VRM). debug vrm inout Displays debug messages for all DSP-specific messages going to and coming from the voice resource manager (VRM). Cisco IOS Release 12.
debug vrm inout debug vrm inout To display debug messages for all DSP-specific messages going to and coming from the voice resource manager (VRM), use the debug vrm inout privileged EXEC command. To stop displaying DSP-specific messages, use the no form of this command. [no] debug vrm inout Syntax Description There are no arguments or keywords used in this command. Defaults No default behavior or values. Command History Release Modification 12.0(7)T This command was introduced.
Glossary Glossary AAA—Authentication, Authorization, and Accounting. AAA is a suite of network security services that provide the primary framework through which access control can be set up on your Cisco router or access server. ACOM—Term used in G.165, “General Characteristics of International Telephone Connections and International Telephone Circuits: Echo Cancellers.
Glossary FIFO—First-in, first-out. In data communication, FIFO refers to a buffering scheme where the first byte of data entering the buffer is the first byte retrieved by the CPU. In telephony, FIFO refers to a queuing scheme where the first calls received are the first calls processed. Gatekeeper—A gatekeeper maintains a registry of devices in the multimedia network. The devices register with the gatekeeper at startup, and request admission to a call from the gatekeeper. The gatekeeper is an H.
Glossary PBX—Private Branch Exchange. Privately-owned central switching office. PLAR—Private Line Auto Ringdown. This type of service results in a call attempt to some particular remote endpoint when the local extension is taken off-key. POTS—Plain Old Telephone Service. Basic telephone service supplying standard single line telephones, telephone lines, and access to the Public Switched Telephone Network. POTS dial peer—Dial peer connected via a traditional telephony network.
