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1 Cisco IOS Release 12.2(2)XT and 12.2(8)T Cisco High-Density Analog Voice and Fax Network Module Feature History This document describes the Ci sco High-Density Analog V oice and Fax Netw ork Module (NM-HD A) in Cisco IOS Release 12.2(8 )T . This do cument includes the follo wing sections: • Feature Overview , page 2 • Supported Platfor ms, pa[...]

Cisco High-Density Analog Voice and Fax Network Module Feature Overview 2 Cisco IOS Release 12.2(2)XT and 12.2(8)T Feature Overview The Cisco High-Density Analog V oice and Fax Netwo rk Module provi des DTMF detection, voi ce compression and decompression, call progress tone generat ion, voice act ivi ty detection (V AD), echo cancellation, and ada[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Feature Overview 3 Cisco IOS Release 12.2(2)XT and 12.2(8)T Telephony Signaling Interfaces V oice ports on routers and access servers physically connect the router or access server to telephony devices such as telephon es, fax machines, PBXs, and (PSTN) central off ice (CO) switches. These de[...]

Cisco High-Density Analog Voice and Fax Network Module Feature Overview 4 Cisco IOS Release 12.2(2)XT and 12.2(8)T FXO and FXS interf aces indicate on-hook or of f-hook status and the seizure of telephone lines b y one of two access signali ng methods: loop star t or ground start. The ty pe of access signaling is determin ed by the ty pe of service[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Feature Overview 5 Cisco IOS Release 12.2(2)XT and 12.2(8)T Supervisory tone disconn ect occurs when the connect e d switch prov ides a special tone to indicat e a change in call state. Some PBXs and PSTN CO switch es provide a 600-millisecon d interruption of line po wer as a supervisory dis[...]

Cisco High-Density Analog Voice and Fax Network Module Feature Overview 6 Cisco IOS Release 12.2(2)XT and 12.2(8)T Se veral dif ferent types of delay combine to mak e up the total end-to-end d elay associated wi th voi ce calls: • Propagation delay—Amount of time it takes t he data to physically tra vel ov er the media. • Handling delay—Amo[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Feature Overview 7 Cisco IOS Release 12.2(2)XT and 12.2(8)T Normally , the defaults in ef fect are suff icient for most networks. Ho wev er, a smal l playout delay from the jitter buf fer can cause lost packets and chop py audio, an d a large playou t delay can cause unacceptably high o veral[...]

Cisco High-Density Analog Voice and Fax Network Module Feature Overview 8 Cisco IOS Release 12.2(2)XT and 12.2(8)T Restrictions The follo wing features not supported at this time: • AT M S V C • SAS signaling Supported High-Complexity Codecs • G.711 a-law • G.711 u-la w • G.723.1 ANNEX-A 5 300 bps • G.723.1 ANNEX-A 6 300 bps • G.723.1[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Supported Platforms 9 Cisco IOS Release 12.2(2)XT and 12.2(8)T Related Documents For informat ion about installing v oice network modules and v oice interface cards in Cisco 2600 s eries, Cisco 3640 and Cisco 3660 rout ers, see these publicat ions: • Cisco 2600 Series Har dwar e Installatio[...]

Cisco High-Density Analog Voice and Fax Network Module Supported Standards, MIBs, and RFCs 10 Cisco IOS Release 12.2(2)XT and 12.2(8)T Ta b l e 2 lists the hardware platforms that support this feature, and th e re leases in which the feature was first sup ported. If the First T train Release column is blank, the feature is not yet a vailable in a C[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Tasks 11 Cisco IOS Release 12.2(2)XT and 12.2(8)T Configuration Tasks See the follo wing sections for conf iguration tasks for this fe ature. • Config uring Analog FXO and FXS V oice Ports (required) • Config uring V oice Acti vity Detection ( V AD) (optional) • Fine-T uni[...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Tasks 12 Cisco IOS Release 12.2(2)XT and 12.2(8)T Step 4 Router(config-voiceport)# ring frequency { 25 | 50 } (FXS only) Selects the ri ng frequ ency , in hertz (HZ), used on the FXS interface. This number must match the connected telephony equi pment and may be country-dependent.[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Tasks 13 Cisco IOS Release 12.2(2)XT and 12.2(8)T Configuring Voice Activity Detection (VAD) V oice activity detecti on (V AD) is conf igured on dial peers; by def ault it is enabled. F or more informatio n, see the “Con figur ing Dial Plans , Dial Peers, and Digit Manipulatio[...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Tasks 14 Cisco IOS Release 12.2(2)XT and 12.2(8)T Configuring Disconnect Supervision Commands PBX and PSTN switches use several dif ferent method s to indicate that a call s hould be disconnected because one or both parties ha ve hung up. The commands in this section are used to c[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Tasks 15 Cisco IOS Release 12.2(2)XT and 12.2(8)T T o change parameters related to disconnect supervis io n, use the follo wing commands as appropria te, in voi ce-port conf iguration mode: Command Purpose Step 1 Router(config-voiceport)# battery-reversal Enables battery rev ers[...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Tasks 16 Cisco IOS Release 12.2(2)XT and 12.2(8)T Configuring FXO Supervisory Disconnect Tone Commands T o create a voice class that def ines the specific tone or tones to be detected an d then apply the v oic e class to the v oice port, use the fo llo wing commands be ginning in [...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Tasks 17 Cisco IOS Release 12.2(2)XT and 12.2(8)T Step 10 Router(config-voice-class)# cadence-list cadence-id cycle-1-on-time cycle-1-off-time cycle-2-on-time cycle-2-off-time cycle-3-on-time cycle-3-off-time cycle-4-on-time cycle-4-off-time (Optional) Specif ies a tone cadence [...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Tasks 18 Cisco IOS Release 12.2(2)XT and 12.2(8)T Configuring Timeouts Commands T o change timeouts parameters, use the follo wing co mmands as appropriate, in vo ice-port conf iguration mode: Command Purpose Step 1 Router(config-voiceport)# timeouts call-disconnect seconds Config[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Tasks 19 Cisco IOS Release 12.2(2)XT and 12.2(8)T Timing Commands T o change timing parameters, use the follo wing commands as appropriate, in v oice-port configurati on mode: Command Purpose Step 1 Router(config-voiceport)# timing dial-pulse min-delay milliseconds Specifies t i[...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Tasks 20 Cisco IOS Release 12.2(2)XT and 12.2(8)T Voice Quality Tuning Commands The commands in this section conf igure parameters to improv e vo ice quality . Common voice quality issues include the fo llo wing: • Config uring Adapti ve Jitter Adjustment (op tional) • Config [...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Tasks 21 Cisco IOS Release 12.2(2)XT and 12.2(8)T Configuring Echo Adjustment By design, echo cancellers are limited by the total amou nt of time the y wait for the reflected speech to be receiv ed, which is kno wn as an echo tr ail . The echo trail is normal ly 32 milliseconds.[...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Tasks 22 Cisco IOS Release 12.2(2)XT and 12.2(8)T Verifying Analog Voice-Port Configurations After conf iguring the v oice ports on your rout er , perform the following steps to v erify proper operation: Step 1 Pick up the handset of an att ached telephon y de vice and check for a[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Tasks 23 Cisco IOS Release 12.2(2)XT and 12.2(8)T Step 6 T o verify the call status for all voice ports, use the show v oice call summary command . Router# show voice call summary Step 7 T o display the contents of the acti ve call table, whic h shows all of the calls cu rrently[...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Tasks 24 Cisco IOS Release 12.2(2)XT and 12.2(8)T T o troubleshoot specif ic areas of the high density analog network module, perform th e follo wing steps: • T o sho w messages from the D SP on the VPM to th e router , Use the debug vpm dsp . • T o show which deb ug commands [...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Tasks 25 Cisco IOS Release 12.2(2)XT and 12.2(8)T Voice Port Testing Commands These commands allow you to force v oi ce ports into specif ic states for testing. They require the use of Cisco IOS Release 12.0(7)XK or 12.1 (2)T or a late r release, and the y apply to Cisco 2600 se[...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Tasks 26 Cisco IOS Release 12.2(2)XT and 12.2(8)T Detector-Related Function Tests Using the test voice port detector command, you are able to force a particular detector int o an on or of f state, perform tests on the detector , and then return the detect or to its original state.[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Tasks 27 Cisco IOS Release 12.2(2)XT and 12.2(8)T Tone Injection Tests T o inject a test tone into a v oice port, use the follow ing commands in pri vile ged EXEC mode: Relay-Related Function Tests T o test relay-related functions on a v oice port, use the foll owing commands in[...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Tasks 28 Cisco IOS Release 12.2(2)XT and 12.2(8)T Fax/Voice Mode Tests The test voic e port switch fax comman d forces a vo ice port into fax m ode for testing. After you enter this comma nd, you ca n use the show voice call or sho w voice call summary command to check whether the[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Configuration Example s 29 Cisco IOS Release 12.2(2)XT and 12.2(8)T Configuration Examples This section pro vides the following v oice port conf iguration ex amples: • Analog FXO V oice Port Example • Analog FXS V oice Port Example Analog FXO Voice Port Example The follo wing e xample sho[...]

Cisco High-Density Analog Voice and Fax Network Module Configuration Examples 30 Cisco IOS Release 12.2(2)XT and 12.2(8)T Analog FXS Voice Port Example The follo wing e xample sho ws analog FXS outpu t for v oice-port conf iguration: voice-port 1/0/0 signal loopStart no vad station-id name test1 abc station-id number 8000 caller-id enable ! voice-p[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Command Reference 31 Cisco IOS Release 12.2(2)XT and 12.2(8)T Command Reference This section documents pre viously undocumented commands. All o ther commands used with this feature are documented in the Cisco IOS Re lease 12.2 command re ference publications. • debug dspapi, page 32 • deb[...]

Cisco High-Density Analog Voice and Fax Network Module debug dspapi 32 Cisco IOS Release 12.2(2)XT and 12.2(8)T debug dspapi T o enable debuggin g for Digital Signal Proce ssor ( DSP) Application Pr ogramming Interface (API) message ev ents, use the debug dspapi command in EXEC mode. T o reset the def ault v alue for this feature, use the no form o[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module debug dspapi 33 Cisco IOS Release 12.2(2)XT and 12.2(8)T Related Commands Com ma nd Des cr ipt io n debug hpi Enables deb ugging for Host Port Interface (HPI) message e vents.[...]

Cisco High-Density Analog Voice and Fax Network Module debug hpi 34 Cisco IOS Release 12.2(2)XT and 12.2(8)T debug hpi T o enable debugging for Host Port In terface (HPI) message e vents, use the deb ug hpi command in EXEC mode. T o reset the default v alue for this feature, use the no form of this command. debug hpi { all | command | detail | err [...]

Cisco High-Density Ana log Voice and Fax Netw ork Module voice-port 35 Cisco IOS Release 12.2(2)XT and 12.2(8)T voice-port T o enter voice-port conf iguration mode, use the voice - port command in global conf iguration mode. Cisco 2600, and Cisco 3600 Router voic e - port { slot - number / su bun i t - number / port } Syntax Descripti on Defaults N[...]

Cisco High-Density Analog Voice and Fax Network Module voice-po rt 36 Cisco IOS Release 12.2(2)XT and 12.2(8)T Related Commands Com ma nd De scr ipt io n dial - peer voi ce Enters dial-peer configuration mode and specifies the method of voice encapsul ation.[...]

Cisco High-Density Ana log Voice and Fax Netw ork Module Glossar y 37 Cisco IOS Release 12.2(2)XT and 12.2(8)T Glossary AT M —Asynchronous T ransport Mode. adaptive ji tter buffering —adapti ve jitter b uffer intelligent ly balances delay and pack et loss through the gate way for maximum call clarity and qu ality . CAS —Channel Associated sig[...]

Cisco High-Density Analog Voice and Fax Network Module Glossary 38 Cisco IOS Release 12.2(2)XT and 12.2(8)T[...]