NEC Ds2000 Software Instructions Manual
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System Timers, Trunks DS1000/2000 Software ManualChapter 1: Features373 Flash DisconnectNot used. 2496mS Force Idle (Trunk Guard Time)Use this timer to set the guard time for trunks. When the system disconnects a trunk (e.g., after a user hang up), the system keeps the line idle until this timer expires. The Trunk Guard Time helps prevent call col- lisions. If you set this interval too short, call collisions may occur. If too long, there will be unnecessary delays before you can use the trunk for a new call.25 (2.5 sec) (Fixed Slot) 10 (1 sec) (U Slot) PBX PauseNot used. 0 Minimum Ring Detection TimerUse this timer to set the threshold for ring detection. If the ring signal is longer than this interval, the sys- tem interprets the signal as valid ringing. If the signal is equal to or shorter than this interval, the system ignores the ringing. Be sure the value you enter is compatible with the local telco. If you set this value too short, the system may detect line spikes and anomalies as ringing. If too long, the system may not properly interpret a valid ringing signal.104 mS DP Make TimerUse this timer to set the duration of the Dial Pulse Make signal (i.e., relay closed). This is the “on” time in a Dial Pulse digit. Set this timer for compatibility with the connected telco or PBX/Centrex. Keep in mind that there are three components of a Dial Pulse digit: Make interval, Break interval and Interdigit interval. An improper setting may cause misdialing.40 mS DP Break TimerUse this timer to set the duration of the Dial Pulse Break signal (i.e., relay open). This is the “off” time in a Dial Pulse digit. Set this timer for compatability with the connected telco or PBX/Centrex. Keep in mind that there are three components of a Dial Pulse digit: Make interval, Break interval and Interdigit interval. An improper setting may cause misdialing.60 mS DP Interdigit TimerUse this timer to set the duration of the Dial Pulse Interdigit signal (i.e., relay open time between each digit). Set this timer for compatability with the con- nected telco or PBX/Centrex. Keep in mind that there are three components of a Dial Pulse digit: Make interval, Break interval and Interdigit interval. An improper setting may cause misdialing.800 mS Table 15: Program 0402 - Trunk Timers (Page 2 of 5) OptionDescriptionDefault
System Timers, Trunks 374Chapter 1: FeaturesDS1000/2000 Software Manual Manual DTMF Tone OnThis timer sets the duration of DTMF digits for trunk calls manually dialed by an extension user. This is required because the system buffers the digits the user dials. Set this timer for compatibility with the connected telco or PBX/Centrex. If you set this interval too short, the telco or PBX/Centrex may not be able to properly detect the DTMF digit. If too long, outbound dialing is unnecessarily slowed down.150 mS Manual DTMF Tone OffThis timer sets the duration of the interval between DTMF digits for trunk calls manually dialed by an extension user. This is required because the system buffers the digits the user dials. Note that this is the minimum DTMF Tone off time guaranteed by the system. Set this timer for compatibility with the connected telco or PBX/Centrex. If you set this interval too short, the telco or PBX/Centrex may not be able to set up to receive the next DTMF digit. If too long, out- bound dialing is unnecessarily slowed down.50 mS Speed Dial DTMF Tone OnThis timer sets the duration of DTMF digits for Speed Dial trunk calls automatically dialed by the system. Set this timer for compatibility with the connected telco or PBX/Centrex. If you set this interval too short, the telco or PBX/Centrex may not be able to properly detect the DTMF digit. If too long, outbound dialing is unnecessarily slowed down.100 mS Speed Dial DTMF Tone OffThis timer sets the duration the quiet time between DTMF digits for Speed Dial trunk calls automatically dialed by the system. Set this timer for compatibility with the connected telco or PBX/Centrex. If you set this interval too short, the telco or PBX/Centrex may not be able to set up to receive the next DTMF digit. If too long, out- bound dialing is unnecessarily slowed down.100 mS Loop Current Detection TimeFor loop start trunks, loop current must be present for this interval before the system seizes the trunk. Set this interval for compatibility with the connected telco or PBX/Centrex. If you set this interval too short, the system may inadvertently seize unstable trunks. If too long, the system may not properly seize a valid trunk.800 mS Codec Digitizing MethodUse this option to set the system’s codec companding method type for the trunk. Be sure this option is always set to 0 ( µ-law companding enabled). Do not set this option to 1 (A-law companding enabled).0 (µ-law) Table 15: Program 0402 - Trunk Timers (Page 3 of 5) OptionDescriptionDefault
System Timers, Trunks DS1000/2000 Software ManualChapter 1: Features375 Setting for International Rotary DiskSet this option for compatibility with the type of rotary dial (500 type) telephone used. Be sure to always set this option to 0.0 (US standard) Far End DisconnectUse this timer to set the loop disconnect interval for trunk calls. If the system detects a loop current inter- ruption longer than this interval it assumes the telco has disconnected the trunk. It then returns the trunk trunk to idle. Set this interval for compatibility with the connected telco or PBX/Centrex. If you set this interval too short, the system may inadvertently disconnect valid trunks. If too long, the system may leave trunks con- nected that it should tear down. 300 mS Minimum Single Ring Detection TimerThe system uses this timer to detect valid ringing sig- nal from the connected telco or PBX. Valid single ring must be longer than this interval.504 mS Minimum Double Ring Detection Off TimerThe system uses this timer to detect valid double ring from the connected PBX. Valid double ring must be longer than this interval.104 mS Maximum Double Ring Detection Off TimerThe system uses this timer to detect valid double ring from the connected PBX. Valid double ring must be less than this interval.304 mS Ringing Signal End Detect TimerIf the ringing signal on a trunk call is interrupted for longer than this interval, the system assumes ringing has stopped and terminates the call. Set this option for compatibility with the connected telco or PBX Centrix. If this interval is set to short, valid ringing will be inadvertently cut off. If too long, the system will leave the call set up even after ringing has stopped.6016 mS Caller ID Detection TimerNot used. 3268 mS Ground Start TimerBefore the system can start a ground start trunk, the telco’s tip ground must be present for longer than this interval. Set this interval for compatibility with the connected telco or PBX/Centrex. If you set this interval too short, the system may inadvertently start a trunk it should not set up. If too long, the system may not start trunks that are functioning normally.800 mS Pause TimerNot used. 3008 mS DP Mute TimerNot used.. 8 mS Table 15: Program 0402 - Trunk Timers (Page 4 of 5) OptionDescriptionDefault
System Timers, Trunks 376Chapter 1: FeaturesDS1000/2000 Software Manual Rules for Detecting Normal CO (Single) Ring 1. The ring signal must be longer than the Minimum Ring Detection Timer (normally 104 mS). 2. The ring signal must also be longer than the Minimum Single Ring Detection Timer (normally 504 mS). 3. The interval between ring bursts must not be longer than the Ringing Signal End Detection Timer (normally 6016 mS). Rules for Detecting Special (Double) Ring (This option is normally not required and is intended for only for certain Centrex/PBX applications P.F. Recovery Detect TimerWhen the ATRU PCB recovers from a power failure, it checks the power failure trunk (trunk 1) for loop current for the P.F. Recovery Detect interval. If loop current is detected, it assumes the Power Failure Tele- phone is still connected and does not tear down the call. If loop current is not detected, the ATRU PCB switches the trunk out of the power failure mode.3008 mS Table 15: Program 0402 - Trunk Timers (Page 5 of 5) OptionDescriptionDefault Minimum Single Ring Detection Timer (504 mS) Minimum Ring Detection Timer (104 mS) Ringing Signal End Detection Timer (6016 mS)Incoming Ring Signal Ring On Ring Off
System Timers, Trunks DS1000/2000 Software ManualChapter 1: Features377 with unique incoming ring.) 1. The ring signal must be longer than the Minimum Ring Detection Timer (normally 104 mS). 2. The ring signal must be shorter than the Minimum Single Ring Detection Timer (normally 504 mS). 3. The off interval between the two double rings must be greater than the Minimum Double Ring Detection Off Timer (normally 104 mS) but less than the Maximum Double Ring Detection Off Timer (normally 304 mS). 4. The interval between the second burst of a ring cycle and the first burst of the next cycle must not be longer than the Ringing Signal End Detection Timer (normally 6016 mS). Rules for Detecting Loop Current 1. When the system seizes a trunk, it will wait the Line Response Time (normally 10 seconds) for loop current. (If it doesn’t detect loop current, it marks the trunk as defective. If it does detect loop current, it will proceed to step 2 below.) Note that Line Response Time is a system timer. (not a trunk timer). 2. Once loop current is detected, it must be present for the Loop Current Detection Time (nor- mally 800 mS). 3. If loop current is interrupted for longer than the Far End Disconnect Time (normally 300 mS), the system disconnects the call. Minimum Single Ring Detection Timer (504 mS) Minimum Ring Detection Timer (104 mS) Ringing Signal End Detection Timer (6016 mS)Incoming Ring Signal Ring On Ring Off Maximum Double Ring Detection Off Timer (304 mS) Minimum Double Ring Detection Off Timer (104 mS) Line Response Time (10 seconds)Far End Disconnect Loop Current Detection Time (800 mS) Loop Current On Trunk Seize Loop Current Off System sets up callSystem does not tear down call Time (300 mS)
System Timers, Trunks 378Chapter 1: FeaturesDS1000/2000 Software Manual Conditions None Default Setting Refer to the chart above. Programming List Refer to the chart above. Other Related Features Refer to the following for related feature information: Program 0402 - Trunk Timers (page 459) Feature Operation None
Tandem Trunking / Unsupervised Conference DS1000/2000 Software ManualChapter 1: Features379 Tandem Trunking / Unsupervised Conference Description Tandem Trunking allows an extension user to join two outside callers in a trunk-to-trunk confer- ence. The extension user can then drop out of the call, leaving the trunks in an Unsupervised Con- ference. The extension user that established the Conference is not part of the conversation. The Conference continues until either outside party hangs up. Tandem Trunking uses a Conference circuit. The following table shows the system’s Conference capacities: The system’s 32 Conference circuits are dynamically allocated as users request them. Conditions None Default Setting Tandem Trunking disabled.DS2000 Fixed Slot Available. DS2000 U Slot DS1000 Join two callers in Conference, leave the call and let their conversation continue. Description Capacity Conference circuits 32 Maximum simultaneous users in Conference (total of all Conferences system-wide)32 Maximum simultaneous conferences 8 Maximum parties in any one Conference (trunks and/or extensions)8
Tandem Trunking / Unsupervised Conference 380Chapter 1: FeaturesDS1000/2000 Software Manual Programming Guide Programming List Program 0402 - Far End Disconnect (page 464) Set the Far End Disconnect time for compatibility with the local telco. Program 1003 - Tandem Trunk (page 510) Enabled (Y) or disable (N) the trunk’s ability to be included in an Unsupervised Conference. Only one of the trunks in the tandem call must have this option enabled. Other Related Features The following features also allow different types of multiple party calls: Barge In (Intrusion) (page 57) An extension user can Barge In on a tandem call. Conference (page 111) Group Listen (page 181) Meet-Me Conference (page 247) Privacy Release Groups (page 297) Forced Trunk Disconnect (page 175) An extension user can end an Unsupervised Conference by using Forced Trunk Disconnect on one of the trunks in the tandem call. Off-Premise Extensions / On-Premise SLT Extensions (page 274) Tandem Trunking is available at Single Line extensions.Step-by-step guide for setting up Tandem Trunking / Unsupervised Conference Step 1: Should trunk have the ability to be included in an Unsupervised Conference? • In Program 1003 - Tandem Trunk (page 510), enter Y. Note that only one of the trunks in the tandem call must have this option enabled. • In Program 0402 - Far End Disconnect (page 464), set the Far End Disconnect time for compatiblity with the local telco. • In Program 1003 - Tandem Trunk (page 510), enter N. Note that only one of the trunks in the tandem call must have this option enabled. If yes If no
Tandem Trunking / Unsupervised Conference DS1000/2000 Software ManualChapter 1: Features381 Feature Operation To set up a tandem call (Unsupervised Conference): 1. Establish trunk call. 2. Press CONF. Your caller hears Music On Hold (if installed) while they wait for you to set up the Conference. 3. Place or answer trunk call OR Retrieve trunk call from Park Orbit. 4. Press CONF to set up the Conference. If you cannot add additional parties to your Conference, you have exceeded the sys- tem’s Conference limit. 5. Hang up. If the outside parties disconnect, the trunks you selected do not have Tandem Trunking capability. To disconnect a tandem call (using Forced Trunk Disconnect): 1. Press line key for busy trunk. OR Press ICM and dial the trunk’s Direct Trunk Access code (e.g., 401 for trunk 1). Refer to Direct Trunk Access for the specifics. 2. Dial # to disconnect the line. The tandem call disconnects. To Barge In on a tandem call: 1. Press line key for busy trunk. OR Press ICM and dial the trunk’s Direct Trunk Access code (e.g., 401 for trunk 1). Refer to Direct Trunk Access for the specifics. 2. Dial 4. You can optionally place the Conference on hold. Your callers hear Music on Hold (if Conversation with caller. Line Key or Loop Key on. Intercom dial tone. ICM on and Line/Loop Key flashing. Conversation with your conferenced callers. Line/Loop Keys on (green). N/A Line/Loop Keys on (red) Busy tone. Line/loop key on (red). Busy tone. Line/loop key on (red). You hear two beeps and you join the tandem call. Line/loop keys on (green).
Tandem Trunking / Unsupervised Conference 382Chapter 1: FeaturesDS1000/2000 Software Manual installed) while waiting on Hold. Press CONF to reinstate the Conference. To set up Tandem Trunking at a Single Line Telephone: 1. Establish trunk call (e.g., lift handset, dial 9, and dial outside number). 2. Hookflash and dial another trunk call. 3. Hookflash and dial #10 to set up Conference. 4. Hang up. If the outside parties disconnect, the trunks you selected do not have Tandem Trunking capability.