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43

NOTES

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Copyright © 2001, 2007

Patton Electronics Company

All Rights Reserved

Содержание 2720/I Series

Страница 1: ...2720 I T1 Fractional T1 CSU DSU with Ethernet Bridging SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com Part 07M2720I UM Doc 08618U2 001 Rev C Revised 10 05 07 An ISO 9001...

Страница 2: ...Application 3 2 Configuration 4 0 Installation 31 4 1 Connecting the 10Base T Ethernet Port to PC DTE 4 2 Connecting the 10Base T Ethernet Port to a Hub 4 3 T1 FT1 Interface Connection 4 4 DC Power C...

Страница 3: ...ed or implied and the installation or use of this product shall be deemed an acceptance of these terms In the event that you detect intermittent or continuous product malfunction due to nearby high po...

Страница 4: ...This protection may be particularly important in rural areas 1 4 FCC PART 68 COMPLIANCE STATEMENT The Model 2720 Series has been tested and registered in compli ance with the specifications in Part 6...

Страница 5: ...ed from Patton Electronics Technical Support at tel 301 975 1007 email support patton com www http www patton com NOTE Packages received without an RMA number will not be accepted Patton Electronics t...

Страница 6: ...high speed LAN to WAN connectiv ity Plugging directly into the 10Base T port of a hub or LAN switch the NetLink T1 provides T1 or FT1 access at connection data rates of 1 544 Mbps nx64 and nx56 n 1 t...

Страница 7: ...il some external event occurs The PPP Bridging Control Protocol BCP defined in RFC 1638 configures and enables disables the bridge protocol on both ends of the point to point link BCP uses the same pa...

Страница 8: ...o transport non routable protocols Figure 2 illustrates transparent bridging between two routers over a serial interface s0 Bridging will occur between the two Ethernet Interfaces on Router A e0 and e...

Страница 9: ...nes density To meet this requirement each time slot can be reduced to 56 kbps and the Least Significant Bit LSB of each time slot set to one Bipolar 8 Zero Patton 2720 Bridge Ethernet LAN PEC Device w...

Страница 10: ...el timeslots Switch S2 5 DS0 Channel Rate Use Switch S2 5 to set the DS0 rate SW2 5 Setting Off 56 kbps On 64 kbps 9 S2 SUMMARY TABLE Position Function Factory Default Selected Option S2 1 Data Rate O...

Страница 11: ...ck is derived from an internal oscillator NOTE 1 When using the Model 2720 as a high speed short range modem one unit of the link must be configured in Internal Clock mode and the opposite end unit mu...

Страница 12: ...the transmit clock originating in the 2720 When S1 2 is set for transmit clock it may be necessary to invert the transmit clock to allow for delays due to long cables S1 3 Tx Clock Invert On Transmit...

Страница 13: ...e stereo plug into the rear of the unit The small recessed jack on the left side of the unit is the control port jack NOTE If your terminal uses a DB 25 connector please use a DB 9 to DB 25 Adapter to...

Страница 14: ...wise clock slips and framing errors and bit errors may occur Internal This is commonly used in campus applications where the unit is not connected to the public telephone network directly In this mode...

Страница 15: ...ear in the middle of the screen 5 Type in the password and press Enter The factory default password for the unit is password is case sensitive patton NOTE If the entry is incorrect the password screen...

Страница 16: ...HINTS 1 To make a selection key the highlighted letter that corre sponds to a menu selection 2 To execute the selection type Enter CR 3 To toggle between options on a highlighted selection Press space...

Страница 17: ...o customize the Model 2720 for your location You can change the default header names to give each unit a unique name and password Also you can reset the unit to its default settings without the manual...

Страница 18: ...known as Superframe format According to TR 62411 The Superframe format consists of 12 frames of 193 bits each for a total of 2316 bits Each 193 bit frame consists of 192 bits preceded by one framing b...

Страница 19: ...gnals are transmitted as a sequence of ones and zeros Ones are sent as pulses and zeros are sent as spaces i e no pulse Every other pulse is inverted from the previous pulse in polarity so that the si...

Страница 20: ...ons 64kbps 56kbps 64kbps Also known as Clear Channel this takes full advantage of the available bandwidth in a DS0 channel Implementing it usually requires B8ZS line coding In certain cases special eq...

Страница 21: ...I performance Only the service provider or special test equip ment can send these requests When AT T TR54016 is selected ANSI PRMs are still transmitted by the unit but only PRMs sent by the carrier w...

Страница 22: ...ver the data stream This is the only remote loopback that the unit can initiate This is useful for campus applica tions when you need to put a remote unit in loopback The remote unit responds to the V...

Страница 23: ...at the Bandwidth Selected will display 1 544k and the Total Channels will display n a When the DS0 Channel Rate is 56kbps the Bandwidth Selected will be a multiple of 56k not of 64k When using the DIP...

Страница 24: ...well as the communica tion link between them Data from the local DTE is sent across the entire communication circuit and looped back to the local DTE The Model 2720 Initiating a RL can be in one of t...

Страница 25: ...ing c spacebar TxTr The Model 2720 is sending a Terminate Loopback mes sage to the remote unit If the remote unit does not respond the local unit will return to the Idle state Tx1s If the remote Model...

Страница 26: ...tern Off The Model 2720 is in local loopback Test Pattern Idle default Options Idle or Sending To send a pattern press the c key and press spacebar to send the test pattern The OK message indicates th...

Страница 27: ...ed framing formats or severe errors in the data stream This error may indicate a noisy line or cable condition This error may indicate a noisy line or cable connection if the frames appear to be set c...

Страница 28: ...m ber of seconds which have elapsed in the current interval respectively The Valid Interval Count saturates at the count of 96 96 15min 24 hours while the Current Interval Time rolls over after 900 co...

Страница 29: ...e PRM is coming from a Carrier whereas the address 38h indicates the PRM is coming from a Customer When the ESF Data Link is set to AT T TR54016 the unit recognizes Carrier originated PRMs which have...

Страница 30: ...p to 40 letters long Two lines provide 80 letters for your use That s a lot of flexibility Password The Password facility provides security by allowing only those who know the correct password to conf...

Страница 31: ...e will transmit with respect to the Transmit clock sent out from the 2720 Please review the information provided with your DTE equipment for more information on its operation In most cases when there...

Страница 32: ...as shown in the dia gram below Figure 4 10BaseT Port 10Base T DTE RJ 45 Pin No RJ 45 Pin No 1 TD 1 TD 2 TD 2 TD 3 RD 3 RD 6 RD 6 RD 4 2 Connecting the 10Base T Ethernet Port to a Hub The 10Base T int...

Страница 33: ...ase T Ethernet Port to a Hub Figure 6 Model 2720 twisted pair line interface 1 RX Data TIP 2 RX Data RING 3 no connection 4 TX Data TIP 5 TX Data RING 6 no connection 7 no connection 8 no connection 1...

Страница 34: ...Solid green indicates that the 10BaseT Ethernet interface has detect ed a valid SQE heartbeat signifying a valid 10BaseT connection Status Blinks yellow from one to eleven times to indicate system sta...

Страница 35: ...test patterns When sending a test pattern the LED will remain lit if the unit does not receive the identical pattern When it receives the cor rect pattern the LED will turn off If error insertion is...

Страница 36: ...perform a LL test follow these steps 1 Activate LL This may be done in one of two ways a Enter Local Loop from the System Diagnostics Statistics menu and toggle the Spacebar until LL appears next to...

Страница 37: ...loop that the unit uses to loop up the remote unit NOTE The NetLink T1 will respond to both loops regard less of the state of the RDL Type To perform an RDL test follow these steps 1 Activate RDL Thi...

Страница 38: ...l central office loops 5 3 BIT ERROR RATE V 52 DIAGNOSTICS The NetLink T1 offers three V 52 Bit Error Rate BER test pat terns These test patterns may be invoked along with the LAL and RDL tests to eva...

Страница 39: ...Statistics menu and toggle the Spacebar until the desired test pattern appears b Enter Test Pattern and toggle the Spacebar to send the selected pattern c One of two result codes will appear to the ri...

Страница 40: ...Clock Options Internal or network clock Diagnostics Responds to CO initiated D4 loopup and loopdown codes ESF line loop and payload loop FDL messages Universal Loopback De activate mes sage V 54 Remot...

Страница 41: ...Protocol PPP RFC 1661 with Bridging Control RFC 1638 MAC Address Table Size 4096 entries MAC Address Aging MAC addresses deleted after 8 min utes of inactivity Frame Buffer 512 Frames Frame Latency 1...

Страница 42: ...MENT PARTS AND ACCESSORIES Patton Model Description 10 09F 6 Foot Control Port Cable 2 5mm to DB9F 07M2720 I User Manual 2720 C UI T1 N x 64 CSU DSU M 34 female UI 2720 B UI T1 N x 64 CSU DSU DB25 fem...

Страница 43: ...ata RING TRS Jack RS 232 Control Port Pin Signal Direction Tip Tx Data From Model 2720 Ring Rx Data To Model 2720 Sleeve Ground RS 232 Control Port Signals at DB 25 Connector Pin Signal Signal Directi...

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Страница 48: ...Copyright 2001 2007 Patton Electronics Company All Rights Reserved...

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