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Cisco BTS 10200 Softswitch ISDN Provisioning and Troubleshooting

OL-12436-02

Chapter 3 ISDN Backhaul Support Using IUA/SCTP

Provisioning an IUA Trunk Group

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Содержание BTS 10200

Страница 1: ... Tasman Drive San Jose CA 95134 1706 USA http www cisco com Tel 408 526 4000 800 553 NETS 6387 Fax 408 527 0883 Cisco BTS 10200 Softswitch ISDN Provisioning and Troubleshooting Software Release 5 0 Revised January 31 2008 Text Part Number OL 12436 02 ...

Страница 2: ...LE FOR ANY INDIRECT SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES INCLUDING WITHOUT LIMITATION LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES CCVP the Cisco Logo and the Cisco Square Bridge logo are trademarks of Cisco Systems Inc Changing the Way We Work Live Play and L...

Страница 3: ...D Channel Status 1 11 Verify Trunk Group Status 1 12 Verify Trunk Termination and Trunk Status 1 12 International PRI Setup 1 14 ISDN Profiles 1 16 Maintenance Message Support 1 16 Customizing D Channel Profiles 1 18 ISDN Timer Configuration Parameters 1 20 ISDN Features and Supplementary Services 1 20 Information Digit Feature 1 21 Calling and Connected Name Delivery 1 22 Calling Number Identific...

Страница 4: ...ckhaul Support Using IUA SCTP 3 1 IUA SCTP Protocols 3 1 Provisioning an IUA Trunk Group 3 2 C H A P T E R 4 Maintaining and Troubleshooting the ISDN System 4 1 Status and Control Commands 4 1 How to Troubleshoot When the ISDN D Channel Fails to Restore 4 4 Checking the Status of a Trunk Termination 4 7 Trunk Static State Is Set to Locally Blocked 4 8 Trunk Static State Is Set to TRNS 4 8 Trunk St...

Страница 5: ...ntroduced 3 5 ISDN PRI was enhanced to include certain PRI variants PBX access and selected PRI supplementary services 4 1 UNSUPP tokens were changed to SUPP Documentation change 08 25 2003 Updated Figure 1 1 Removed the line and in the FACILITY message in the network to user direction as an optional IE from Table 1 1 4 2 No change 4 4 0 4 4 1 Added Generic and Info Digit features revised Network ...

Страница 6: ...support providing documentation feedback security guidelines and also recommended aliases and general Cisco documents see the monthly What s New in Cisco Product Documentation which also lists all new and revised Cisco technical documentation at http www cisco com en US docs general whatsnew whatsnew html Standards Title RFC 3057 RFC 3057 ISDN Q 921 User Adaptation Layer RFC 2960 RFC 2960 Stream C...

Страница 7: ...DN signaling on the Cisco BTS 10200 Softswitch and voice gateways For SCTP IUA ISDN Provisioning The basic ISDN network elements and signaling connections are shown in Figure 1 1 Standby elements in the figure are omitted for clarity Figure 1 1 ISDN Network Elements Note The Cisco BTS 10200 Softswitch Call Agent CA supports multiple voice gateways or PBXs PBX Phone IP network Cisco voice gateway B...

Страница 8: ...nt Side A and the MGW There is no need for the Softswitch to switch over to Call Agent Side B If the primary Call Agent goes down then the Cisco BTS 10200 switches to the secondary Call Agent Figure 1 2 Backhaul Set Group and Session 52075 IP network Voice gateway Cisco AS5300 Gbit Ethernet Ethernet Router Router Call agent backhaul port Call agent backhaul port Call agent backhaul ports Backhaul ...

Страница 9: ...N PRI Network Side basic call control procedures as described in Q 931 ISDN Call Control Procedures The network side stack has the following PRI variants enabled ISDN US NI2 PRI TR 1268 ISDN Q931 PRI ISDN DMS ISDN ATT 4ESS PRI ISDN ATT 5ESS PRI Figure 1 3 shows a sample PRI network side configuration Figure 1 3 PRI Network Side Configuration SIP Phones 119938 PRI User Side Signaling Network Side C...

Страница 10: ...SS PRI Figure 1 4 shows a sample PRI user side configuration Figure 1 4 PRI User Side Configuration Cisco BTS 10200 Provisioning This section provides an overview of the Cisco BTS 10200 Softswitch provisioning steps The basic Cisco BTS 10200 provisioning sequence is shown below Note These steps provision ISDN specific data in the Cisco BTS 10200 Softswitch database Referenced data tables such as D...

Страница 11: ...a PRI backhaul perspective although a BFG resides on a particular slot in the chassis The architecture of a BFG is such that each slot acts as an independent gateway in itself The Cisco BTS 10200 Softswitch addresses individual BFG cards by the card IP address so the slot number is zero Current CLI implementation uses a total of 16 bits with the D channel slot represented by 8 bits and the D chann...

Страница 12: ...l session set ID created in Step 2c and appropriate values configured on the gateway Information as seen on IOS Gateway session group group1 10 89 225 223 9000 10 89 227 200 9000 0 session group group1 10 89 226 223 9001 10 89 227 200 9001 0 session group group2 10 89 225 224 9000 10 89 227 200 9000 0 session group group2 10 89 226 224 9001 10 89 227 200 9001 0 CLI associated with information seen...

Страница 13: ... 10 t 303 4 t 305 30 t 308 4 t 309 90 t 310 10 t 316 30 t 321 20 t 322 4 t 323 30 Note See the ISDN Profiles section on page 1 16 for more information b Add the ISDN interfaces add isdn intf isdn dchan id 100 intf 0 c Add the ISDN D channels using the backhaul session set ID added in Step 2c and ISDN interfaces added in Step 3b where dchan port refers to the DS1 span number used add isdn dchan id ...

Страница 14: ...ermination used in Step 3f add trunk cic start 1 cic end 23 tgn id 100 mgw id mgw isdn termination prefix S4 DS1 1 termination port start 1 termination port end 23 intf 0 h Add the subscriber then link to the trunk group See the Cisco BTS 10200 Softswitch Provisioning Manual for additional details In the following example the subscriber profile ID must already exist add subscriber id pbx1 cisco co...

Страница 15: ...tep 4b add isdn dchan id 100 backhaul type RUDP set id backset1 dchan slot 0 dchan port 0 dchan type primary dchan intf 0 isdn dchan profile id NI2 add isdn dchan id 100 backhaul type RUDP set id backset1 dchan slot 0 dchan port 1 dchan type backup dchan intf 1 isdn dchan profile id NI2 d Add an ISDN trunk group profile add isdn tg profile id dallas1 chrg num supp Y e Add the ISDN trunk groups usi...

Страница 16: ...1 cisco com category pbx name pbx1 status active address1 1651 n glenville suite 200 address2 Richardson tx 75081 ss number 643 77 1837 billing dn 972 233 9000 dn1 972 233 9000 ring type dn1 1 tgn id 100 sub profile id dp1 change trunk grp id 100 main sub id pbx1 cisco com Place MGW ISDN D Channels Trunk Groups and Trunks In Service This procedure places the MGW and the ISDN trunk groups in servic...

Страница 17: ...g steps to verify the MGW status Step 1 Check the MGW status status mgw id mgw isdn Reply Success MGW ID mgw isdn RESULT ADM configure result in success REASON ADM executed successful ADMIN STATE ADMIN_INS OPER STATE Media gateway in working status Step 2 If the administrative state is ADMIN_INS and the operational state is working status the CA to MGW connection is functioning properly Proceed to...

Страница 18: ...runk termination and trunk status Step 1 Verify the trunk termination and trunk status The following command queries both the trunk termination status and trunk channel status status trunk termination tgn id 100 cic 8 Reply Success RESULT ADM configure result in success REASON ADM executed successful TGN ID 100 CIC 8 TERM ADMIN STATE ADMIN_INS TERM OPER STATE Termination is idle TERM REASON No fau...

Страница 19: ...TATE IDLE TRUNK_REASON NON_FAULTY TGN_ID 100 CIC 1 RESULT ADM configure result in success REASON ADM executed successful TERM_ADMIN_STATE ADMIN_INS TERM_OPER_STATE Termination is idle TERM_REASON No fault reason available TRUNK_STATIC_STATE ACTV TRUNK_DYNAMIC_STATE IDLE TRUNK_REASON NON_FAULTY Step 2 The system is functioning properly if all of the following conditions are shown in the system resp...

Страница 20: ... isdn farend init n isdn query supp n nfas supp n bchan neg supp y t 301 300 t 302 10 t 303 4 t 305 30 t 308 4 t 309 90 t 310 10 t 316 30 t 321 20 t 322 4 t 323 30 Note See the ISDN Profiles section on page 1 16 for more information b Add the ISDN interfaces add isdn intf isdn dchan id 100 INTF 0 c Add the ISDN D channels using the backhaul session set ID added in Step 2c in the Provisioning secti...

Страница 21: ...n on page 1 5 add trunk CIC START 1 CIC END 15 TGN ID 100 MGW ID mgw isdn TERMINATION PREFIX S4 DS1 1 TERMINATION PORT START 1 TERMINATION PORT END 15 INTF 0 add trunk CIC START 17 CIC END 32 TGN ID 100 MGW ID mgw isdn TERMINATION PREFIX S4 DS1 1 TERMINATION PORT START 17 TERMINATION PORT END 32 INTF 0 h Add the subscriber then link to the trunk group add subscriber id subscriber ID category pbx n...

Страница 22: ...ort by the PBX means the PBX does not send an acknowledgment message back to the Call Agent Maintenance message support using service and restart messages handles the protocol discriminator for national coding 0x43 Unsolicited service acknowledgment messages are also handled including proper update of the trunk or channel states The ISDN D channel profile is provisioned using the CLI See the Cisco...

Страница 23: ...messages Note This value must be set correctly otherwise all calls will be lost during switchover The following cases illustrate some scenarios using the tokens listed above Case 1 CA sends RESTART All Interface Restart Class 7 a single restart for all interfaces in a PRI group ISDN RESTART PRI SUPP YES Case 2 CA sends RESTART Single Interface Restart Class 6 a single restart for each interface in...

Страница 24: ... supports the service message a Set the following tokens in the isdn dchan profile to isdn service supp y isdn restart chan supp n isdn restart interface supp n isdn farend init n isdn restart pri supp n b Control the D channel out of service then back in service c Check the status of the trunk terminations within 30 seconds of restoring the d channel group If the operational state for the trunks ...

Страница 25: ... isdn restart pri supp n b Control the D channel out of service then back in service c Check the status of the trunk terminations If the operational state for terminations is TRANS the restart interface message is not supported by the PBX set isdn restart interface supp n If the operational state is IDLE the restart interface message is supported by the PBX set isdn restart interface supp y Step 4...

Страница 26: ...implemented in the Cisco BTS 10200 Softswitch ISDN Features and Supplementary Services ISDN features and supplementary services include the following Information Digit Feature Calling and Connected Name Delivery Calling Number Identification Service CLIP CLIR Redirecting Number Support Table 1 1 Configuration Protocol Timers Timer Number BTS Default User Side Network Side T301 300 180 180 T302 10 ...

Страница 27: ...new ISDN D Channel Profile table tokens are used to provision Generic Digits gendigit ie supp gendigit ie codeset gendigit tod infodigit The following example shows how to provision new generic digit tokens add isdn dchan profile id dms 250 type swv dms pri interface type network gendigit ie supp y gendigit ie codeset 6 gendigit tod infodigit 4 Because the Info Digits information is associated wit...

Страница 28: ...s a supplementary service that allows identification of a calling or connected name for PRI interfaces It allows calls flowing through a Cisco BTS 10200 Softswitch ISDN virtual gateway to pass the calling or connected name data between the ISDN adapter and the internal signaling adapter interface SAI to the basic call module BCM It is configured using the ISDN D Channel Profile table Table 1 2 des...

Страница 29: ...PN from an incoming PRI configured as DMS 100 and to send an OCPN to a PRI configured as DMS 100 interface NI PRI type swv us ni2 pri FACILITY SETUP FACILITY IE Sent if facil ie supp y cname encode method protocol DISPLAY IE Sent if disp ie supp y cname encode method raw disp Facility IE carrying Cname is supported in the SETUP message in both the user to networks and network to user directions as...

Страница 30: ...lowing sections provide the provisioning steps for specific PBXs The steps are executed by using the Cisco BTS 10200 Softswitch CLI For more information about using the CLI see the Cisco BTS 10200 Softswitch Command Line Interface Guide Table 1 3 lists the switch vendors protocol the section and the page of the configuration example Table 1 3 Switch Vendors Protocol and Configuration Examples Swit...

Страница 31: ...rtel DMS 100 PBX replace Step 3a with the following add isdn dchan profile id intertel dms100 type swv dms pri interface type network isdn service supp y isdn restart chan supp y isdn restart interface supp y isdn farend init n send group dn n t 301 300 t 302 10 t 303 4 t 305 30 t 308 4 t 309 90 t 310 10 t 316 30 t 322 4 t 323 30 isdn query supp y isdn restart pri supp y nfas supp n t 321 20 bchan...

Страница 32: ... raw display IE replace Step 3a with the following add isdn dchan profile id lucent cnamraw type swv us ni2 pri isdn service supp n isdn restart pri supp n isdn query supp y isdn restart chan supp n isdn restart interface supp y nfas supp n bchan neg supp y cname encode method raw disp disp ie supp y disp ie codeset 0 isdn farend init y Lucent Definity G3r with DMS 100 To provision a Lucent Defini...

Страница 33: ...nt of calling party number with charge number replace Step 3a with the following 2 commands add isdn dchan profile id nt dms100 type swv dms pri isdn service supp n isdn farend init n isdn restart pri supp n isdn query supp y nfas supp n isdn restart chan supp n isdn restart interface supp y bchan neg supp y cname encode method protocol disp ie supp y disp ie codeset 0 add isdn tg profile id lucen...

Страница 34: ...start chan supp n bchan neg supp y disp ie supp y disp ie codeset 0 cname encode method raw disp Toshiba Strada DK424 with NI2 To provision a Toshiba Strada DK424 with NI2 Toshiba NI1 PBX replace Step 3a with the following add isdn dchan profile id toshiba ni2 type swv us ni2 pri interface type network isdn service supp n isdn restart chan supp y isdn restart interface supp y isdn farend init n t ...

Страница 35: ... type IUA isdn_dchan profile id NI2 dchan intf 0 Step 2 Provision multiple trunk groups to the same ISDN D channel id 40089 In this example 6 trunk groups 9950 9951 9952 9953 9954 9955 are provisioned add trunk grp id 9950 call agent id CA146 tg type ISDN tg profile id tb78 isdn dchan1 pop id tb78 GLARE ALL mgcp pkg type T dial plan id tb78 isdn dchan id 40089 add trunk grp id 9951 call agent id C...

Страница 36: ...l plan for each of the 6 destination trunk groups a Add the destination ids add destination dest id 9950 call type local route type route route guide id 9950 add destination dest id 9951 call type local route type route route guide id 9951 add destination dest id 9952 call type local route type route route guide id 9952 add destination dest id 9953 call type local route type route route guide id 9...

Страница 37: ...Initiator 9950 Port 1 Channel 2 PESQ 2 1 VQES 3 0 DTMF 1 1 Speech and DTMF 1 0 Port 1 Channel 3 PESQ 2 1 VQES 3 0 DTMF 1 1 Speech and DTMF 1 0 Port 1 Channel 4 PESQ 2 1 VQES 3 0 DTMF 1 1 Speech and DTMF 1 0 Port 1 Channel 5 PESQ 2 1 VQES 3 0 DTMF 1 1 Speech and DTMF 1 0 Port 1 Channel 6 PESQ 2 1 VQES 3 0 DTMF 1 1 Speech and DTMF 1 0 Port 1 Channel 7 PESQ 2 1 VQES 3 0 DTMF 1 1 Speech and DTMF 1 0 P...

Страница 38: ...ups on a Single ISDN D Channel Sample Line Test Configuration for Multiple Trunk Groups on a Single ISDN D Channel Port 1 Channel 23 Code 105 Port 1 Channel 24 ISDN D Channel N A Special N A Table 2 1 Sample ISDN 23B D Line Test Configuration T1 Port DS0 B channel Test Type Phone Number Agent Type Trunk Group ...

Страница 39: ...h as Q 931 and NI2 There are several benefits to using IUA SCTP in place of Session Manager SM RUDP including the following the multi streaming feature of SCTP allows each D channel to use a different stream to prevent head of line blocking the multi homing feature of SCTP provides more efficient network redundancy compared to RUDP SCTP allows a configurable maximum outstanding receive window in n...

Страница 40: ...ay add mgw id 5400 iuasctp mgw tsap addr c5400 93 call agent id CA146 mgw profile id 5400 iuasctpmgwp type TGW mgw port 2427 Step 3 Add an SCTP Association profile The remote port configured in the SCTP Association table must match the local port specified in the gateway side when the Application Server was configured add sctp assoc profile id 5400 sctp asscp Step 4 Add an SCTP Association The ULP...

Страница 41: ... different trunk groups See Chapter 2 Multiple Trunk Groups on a Single ISDN D Channel for more information Step 12 Add a route The Route table contains a list of up to ten trunk groups to route a call add route id isdn iua te tgn1 id 54007001 Step 13 Add a route guide add route guide ID isdn iua rg policy type ROUTE policy id isdn iua rte Step 14 Add a destination add destination dest id isdn iua...

Страница 42: ...3 4 Cisco BTS 10200 Softswitch ISDN Provisioning and Troubleshooting OL 12436 02 Chapter 3 ISDN Backhaul Support Using IUA SCTP Provisioning an IUA Trunk Group ...

Страница 43: ...uses and corrective actions related to events and alarms Status and Control Commands This section describes the status and control commands for ISDN Table Name ISDN DCHAN Table Containment Area EMS Call Agent Command Types Status and control Examples Status isdn dchan dchan type primary Status isdn dchan dchan type backup Control isdn dchan dchan type primary mode forced target state oos Control i...

Страница 44: ... request switchover DCHAN_RESTORE_SCTP_ASSOC_ESTB_ NORMAL ISDN D Channel restore SCTP association establish normal DCHAN_RESTORE_SCTP_ASSOC_ESTB_ SWITCHOVER ISDN D Channel restore SCTP association establish switchover DCHAN_RESTORE_IUA_ACTIVE_NORMAL ISDN D Channel restore IUA layer active normal DCHAN_ RESTORE _IUA_ACTIVE_ SWITCHOVER ISDN D Channel restore IUA layer active switchover DCHAN_RESTORE...

Страница 45: ...HAN_REMOVE_SCTP_ASSOC_REQ ISDN D Channel remove SCTP association request ISDN_DCHAN_REMOVE_GRACEFUL ISDN D Channel remove gracefully Table 4 1 D Channel Operational Status to Status Output Mapping continued D Channel Operational Status Status Output Table 4 2 D Channel NFAS Operational Status to Status Output Mapping D Channel NFAS Operational Status Status Output ISDN_DCHAN_STATE_MOOS ISDN D Chan...

Страница 46: ... backup target state ins If the response does not show that the D channel is in service NFAS or D channel backup may also show ISDN_DCHAN_STATE_INS for the D channel operational status then If the response is ISDN D Channel out of service go to Step 1 If the response is ISDN D Channel restore session set fail normal or switchover go to Step 2 If the response is ISDN D Channel restore establish fai...

Страница 47: ...ap addr or the mgw tsap addr are DNS names does nslookup on both Call Agents resolve the values to one unique IP address c Can the call agent tsap addr in the four entries be pinged from the media gateway Do the Call Agents actually have the IP addresses or DNS names specified d Can the mgw tsap addr be pinged from both Call Agents e Does the isdn dchan profile exist show isdn dchan profile id Kee...

Страница 48: ...or BSM_dchan_tbl_insert or bsm_dchan_tbl_insert The slot port value is the actual value retrieved from the database For the AS5300 this value should be 0 1 2 or 3 This is a decimal value The top 16 bits are the slot and the bottom 16 bits are the port Step 4 D channel states for NFAS ISDN D Channel is in Wait for Service Ack or ISDN D Channel is Maintenance Busy This means the states at the far en...

Страница 49: ... RESULT ADM configure result in success REASON ADM executed successfully TERM_ADMIN_STATE ADMIN_INS TERM_OPER_STATE Term is available for new calls TERM_REASON No fault reason available TRUNK_STATIC_STATE ACTV TRUNK_DYNAMIC_STATE IDLE TRUNK_REASON NON_FAULTY Reply Success at 2007 01 03 15 41 32 by btsadmin Entry 1 of 1 returned The above status shows that the trunk is active in idle mode and ready...

Страница 50: ... ADMIN state is ADMIN _INS verify that the D channel OPER STATE is IN SERVICE see the How to Troubleshoot When the ISDN D Channel Fails to Restore section in case of any issues Clear any SIGNALLING FAULT states Trunks must be in active or idle mode and ready for use Step 3 If TRUNK REASON is set to TERM_FAULT then the terminations are in FAULTY states Verify the IP connectivity from the CA to the ...

Страница 51: ...mination to INS in case there is an error on the PBX side Also set the isdn service supp token in the ISDN D channel group profile per the procedures supported by the PBX Termination Status Is Faulty The TERM_STATUS_FAULTY message indicates an MGCP problem Things to Check Is the MGW profile set up for the trunk Is the MGW in the in service operational state Perform the no mgcp mgcp commands on the...

Страница 52: ...following ERROR Default Only error traces STATE State transitions and errors PACKET IUA packets sent or received and errors ALL SCTP signals received from SCTP stack state transitions IUA packets sent or received and errors The following example CLI command enables specific trace details set trace call agent id CA146 trace sctp api y trace sctp txrxchunks y trace sctp state y trace sctp signal y t...

Страница 53: ...stamps log datetime localtime no service password encryption hostname c2421 200 enable password xxxxxxx clock timezone CDT 6 network clock base rate 56k network clock select 3 T1 0 network clock select 1 T1 1 network clock select 2 system SCB ip subnet zero ip domain name ipclab cisco com ip name server 10 89 224 1 ip audit notify log ip audit po max events 100 backhaul session manager set isdn1 c...

Страница 54: ...sulation ppp shutdown no cdp enable interface Serial1 23 bandwidth 64000 no ip address no logging event link status isdn switch type primary ni isdn protocol emulate network isdn incoming voice voice isdn bind l3 backhaul isdn1 no cdp enable ip classless ip route 0 0 0 0 0 0 0 0 10 89 227 254 no ip http server ip pim bidir enable access list 1 permit 10 0 24 0 0 0 0 255 call rsvp sync voice port 1...

Страница 55: ... 2 service timestamps debug datetime msec service timestamps log datetime localtime no service password encryption hostname c5400 102 boot system flash c5400 is mz sc70930 no boot startup test logging queue limit 100 logging buffered 99999 debugging enable password callagent resource pool disable clock timezone cdt 5 spe default firmware spe firmware 1 aaa new model aaa authentication login defaul...

Страница 56: ...receive maximum recipients 0 iua AS as tb78 10 89 232 102 9900 ASP asp tb78 AS as tb78 190 101 56 214 190 101 55 214 9900 ASP asp sec tb78 AS as tb78 190 101 56 212 190 101 55 212 9900 controller T1 6 0 framing esf linecode b8zs pri group timeslots 1 24 service mgcp controller T1 6 1 framing esf linecode b8zs controller T1 6 2 framing sf linecode ami controller T1 6 3 framing sf linecode ami pri g...

Страница 57: ...e ami controller T1 7 4 framing sf linecode ami controller T1 7 5 framing sf linecode ami controller T1 7 6 framing sf linecode ami controller T1 7 7 framing sf linecode ami interface FastEthernet0 0 ip address 10 89 232 102 255 255 255 0 duplex auto interface FastEthernet0 1 no ip address shutdown duplex auto speed auto interface Serial0 0 no ip address shutdown clockrate 2000000 interface Serial...

Страница 58: ...0 89 232 254 ip http server logging trap debugging logging 10 89 227 251 tacacs server host 10 89 232 104 tacacs server timeout 15 tacacs server directed request snmp server community public RO snmp server community private RW snmp server system shutdown snmp server enable traps tty radius server authorization permit missing Service Type call rsvp sync voice port 6 0 23 voice port 6 3 23 mgcp mgcp...

Страница 59: ...tion tgn id 17 cic 1 target state ins mode forced Step 3 Check the status of the trunk group status trunk grp id TG ID number call agent id CA ID If the trunk group status has still not changed to ADMIN_INS even though the commands in Steps 1 and 2 were successful then it means that communication to the MGW has been lost Notify your system administrator and have the problem corrected before contin...

Страница 60: ...states NORMAL FORCED ACTIVE STANDBY FORCED STANDBY ACTIVE When the control command is entered on a Call Agent connected to an ISDN trunk group D channel the Call Agent switchover time is approximately 20 seconds During all but the first 6 seconds of this switchover time the ISDN D channel is temporarily down However the D channel comes back up and the ISDN trunk group automatically returns to in s...

Страница 61: ...forced control trunk grp id 100 target state ins mode forced Bring down a trunk group control trunk grp id 100 target state oos mode forced Controlling a trunk group out of service automatically brings down the D channel It also brings down the backhaul session if the trunk group was the last trunk group configured in the gateway control trunk grp id 100 target state oos mode forced control trunk ...

Страница 62: ... Otherwise primary D channel is not impacted by this command Bring down both the primary and backup D channels if NFAS is configured N A control isdn dchan id dchan1 mode forced target state oos Controlling D channel out of service automatically brings down the backhaul session if the D channel was the last D channel configured in the gateway control isdn dchan id dchan1 mode forced target state o...

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