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2.0  GENERAL INFORMATION

Thank you for your purchase of this Patton Electronics product.

This product has been thoroughly inspected and tested and is warrant-
ed for One Year parts and labor.  If any questions arise during installa-
tion or use of the unit, contact Patton Electronics Technical Services at
(301) 975-1007.

2.1  FEATURES

•  Terminates T1/FT1 Circuits over a 4-Wire RJ-48C interface
•  10Base-T Ethernet bridge
•  PPP (Point to Point Protocol, RFC 1661) with Bridge Control

Protocol (RFC 1638)

•  Unstructured Rates at 1.544 Mbps
•  D4 or ESF Framing Modes
•  Supports AMI or B8ZS/B7ZS Line Coding
•  Configuration via Software Control Port or Internal DIP Switches 
•  Six Easy-to-Read LED Indicators Monitor Data & Diagnostics
•  Internal or Receive Recover Clocking
•  Also Operates as a High-Speed Point-to-Point Modem
•  Made in USA

2.2  GENERAL PRODUCT DESCRIPTION

The 

NetLink-T1™ Model 2720/I is a single port T1/FT1 CSU/DSU

with Ethernet Bridging that provides  high-speed LAN-to-WAN connec-
tivity. 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 to 24 channels).  The Netlink-
T1™ is an excellent choice for internet access as well as LAN-to-LAN
services.

The Netlink-T1™ provides digital access to a local WAN service

provider or directly between two facilities over a dedicated 4-Wire  cir-
cuit.  WAN bandwidth, framing and coding options are programmed via
externally accessible DIP switches or via a VT-100 type terminal using
the rear-mounted EIA-232 Control Port. Netlink-T1™ supports D4/ESF
framing options and AMI/B8ZS/B7ZS line coding.  Netlink-T1™ also
supports a full range of system and diagnostic features that make sys-
tem setup easy.  The Ethernet Bridge in this unit requires no configura-
tion at all.

The NetLink-T1™ provides T1 terminations over a modular RJ-48C

jack and comply with jitter tolerance capabilities as specified in ANSI
T1.403 and AT&T TR62411. External power options include 120VAC
and universal interface 100-240VAC. 48VDC and rack card versions
are also available.

3.

If your CSU causes harm to the telephone network, the telephone 

company may temporarily discontinue your service. If possible, they will
notify you in advance, but if advance notice is not practical, you will be noti-
fied as soon as possible and will be informed of your right to file a complaint
with the FCC.
4.

If you experience trouble with the CSU, please contact Patton

Electronics, Co. for service or repairs. Repairs should be performed only by
Patton Electronics Co.
5.

You are required to notify the telephone company when you disconnect

the CSU from the network.

1.6 SERVICE INFORMATION

All warranty and non-warranty repairs must be returned freight prepaid

and insured to Patton Electronics.  All returns must have a Return Materials
Authorization number on the outside of the shipping container. This number
may be obtained from Patton Electronics Technical Support at: tel:  (301)
975-1007 
email:  [email protected] www:  http://www.patton.com.
NOTE: 
Packages received without an RMA number will not be accepted.
Patton Electronics' technical staff is also available to answer any questions
that might arise concerning the installation or use of your Patton Model
2720. Technical Support hours:  8AM to 5PM EST, Monday through
Friday.

1.7  CE NOTICE

The CE symbol on your Patton Electronics equipment indicates that it

is in compliance with the Electromagnetic Compatibility (EMC) directive and
the Low Voltage Directive (LVD) of the European Union  (EU).  A Certificate
of Compliance is available by contacting Technical Support.

Summary of Contents for NetLink 2720 Series

Page 1: ...I T1 Fractional T1 CSU DSU with Ethernet Bridging SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com Part 07M2720 I A Doc 086181UA Revised 04 11 01 C E R T I F I E D An ISO...

Page 2: ...m as warranted your sole recourse shall be repair or replacement as described above Under no con dition shall Patton Electronics be liable for any damages incurred by the use of this product These dam...

Page 3: ...ct you in advance If you elect to do so you have the right to file a complaint with the FCC If you have any trouble operating the Model 2720 Series please contact Patton Electronics Technical Support...

Page 4: ...atures that make sys tem setup easy The Ethernet Bridge in this unit requires no configura tion at all The NetLink T1 provides T1 terminations over a modular RJ 48C jack and comply with jitter toleran...

Page 5: ...al Cisco router with a serial interface configured as a PPP Half Bridge The router serial interface uses a remote device that supports PPP bridging to function as a node on the remote Ethernet network...

Page 6: ...s On 64 kbps 3 1 1 Switch S2 The table below shows the default configurations for Switch S2 A description of all S2 options follows this table Switches S2 1 S2 2 and S2 3 Use Switches S2 1 S2 2 and S2...

Page 7: ...ck your clock mode settings and Tx Clock Invert S1 3 settings Switch S2 8 Reserved 3 1 2 Switch S1 The chart below shows the default configurations for Switch S1 A description of all S1 options follow...

Page 8: ...operating parameters Follow the instructions below to configure the Model 2720 using the software selections 1 Plug the 9 pin male end of the cable to your terminal or com puter s DB 9 serial port and...

Page 9: ...each letter you type The maximum length of the password which can include any character the terminal can generate is 16 characters 6 The Model 2720 will then display the Main Menu screen 3 2 1 Introd...

Page 10: ...isfaction you can save the changes permanently by exe cuting the Save Changes command This will update the unit s configuration and save all the parameters to permanent mem ory Logoff For security log...

Page 11: ...ring of the network interface performance over the Facility Data Link FDL AT T TR 62411 says the Extended Superframe Format extends the DS1 superframe structure from 12 to 24 frames for a total of 463...

Page 12: ...PRMs The messages con tain the NI performance over the last four seconds Thus up to three consecutive messages may be lost without loss of information It is available only with ESF When ANSI T1 403 is...

Page 13: ...the line The duration of the loopback is limited by the loopback timeout setting See Unit Operations paragraph 3 2 4 on pages 32 and 33 Default Config Source Switch default Option EEPROM Switch The Mo...

Page 14: ...al DTE The Model 2720 Initiating a RL can be in one of the following states Idle No user controlled loopbacks are active TxPr The Model 2720 is sending the preparatory phase pattern lasting for approx...

Page 15: ...the eight status messages Excessive zeros EXZ i e lack of pulses detected This condition may occur if the unit is not connected to the network in which case the EXZ is displayed continuously If EXZ co...

Page 16: ...hot of the link performance To clear all counters press the Backspace key If your keyboard does not have this key you can press a two key combi nation to affect the same result Hold down the Ctrl key...

Page 17: ...n minutes 00 30 thirty minutes default setting 00 45 forty five minutes 01 00 one hour 01 30 90 minutes 02 00 two hours 03 00 three hours NEVER forever the unit will remain in loopback without user in...

Page 18: ...Port 10Base T Hub RJ 45 Pin No RJ 45 Pin No 1 TD 1 RD 2 TD 2 RD 3 RD 3 TD 6 RD 6 TD 4 3 T1 FT1 INTERFACE CONNECTION The Network Line Interface Line is an eight position keyed modu lar jack configured...

Page 19: ...e s not octet aligned 7 pulses WAN receive frame s aborted 8 pulses Detected WAN receive frame s with CRC 9 pulses Detected LAN receive frame s too large 10 pulses Detected LAN receive frame s not oct...

Page 20: ...RL The Remote Digital Loopback RL test checks the performance of both the local and remote NetLink T1 as well as the communication link between them Any characters sent to the remote NetLink T1 in thi...

Page 21: ...h the LAL and RDL tests to evaluate the unit s and the communication links When a 511 2047 or QRSS test is invoked the NetLink T1 generates a pseudo random bit pattern of 511 bits 2047 bits or 2 20 bi...

Page 22: ...47 QRSS Standards AT T TR62411 TR54016 ANSI T1 403 Power Supply 120VAC 60 Hz to 5VDC 300mA wall mount transformer or UI 100 240VAC 50 60 Hz to 5 VDC 2A desktop trans former Dimensions 3 5 L x 2 1 W x...

Page 23: ...SSIGNMENT RJ 48C T1 DS0 Network Interface Female Modular Jack Pin Signal 1 RX Data TIP 1 2 RX Data RING1 4 TX Data TIP 5 TX Data RING TRS Jack RS 232 Control Port Pin Signal Direction Tip Tx Data From...

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