[V.35 Description] [V.35
ICs ] [V.35 Standard Organizations]
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V.35 bus was discontinued and replaced by the V.10 / V.11
standards in 1989. The V.35 interface supported 48kbps over an RJ45
telco connector.
The speed for V.35 was
later increased to 2Mbps.
At 48kbps the maximum cable length is around 400 meters, and
at 2Mbps the maximum length decreases to 15 meters.
The pin out below is
for a 34-pin square connector (MRAC-34).
V.35 uses differential signaling
(V.11) on the data and clock lines, while control signals are
Single-Ended (V.28).
The characteristic impedance is 100 ohms, With
differential voltage levels employed at +/- 1.1 volts DC.
Off-set from
ground is +/-0.2v at the driver and +/- 0.6 volts at the receiver.
| Pin Name | Pin ID | Pin Description | Signal Type |
|---|---|---|---|
| FG | A | Frame/Chassis Ground | - |
| SG | B | Signal Ground | - |
| SDA | P | Send Data A | Differential |
| SDB | S | Send Data B | Differential |
| RDA | R | Receive Data A | Differential |
| RDB | T | Receive Data B | Differential |
| RTS | C | Request To Send | Unbalanced |
| CTS | D | Clear To Send | Unbalanced |
| DSR | E | Data Set Ready | Unbalanced |
| DTR | H | Data Terminal Ready | Unbalanced |
| RLSD | F | Received Line Signal Detect | Unbalanced |
| TCEA | U | Transmit Clock Ext A | Differential |
| TCEB | W | Transmit Clock Ext B | Differential |
| TCA | Y | Transmit Clock A | Differential |
| TCB | AA | Transmit Clock B | Differential |
| RCA | V | Receive Clock A | Differential |
| RCB | X | Receive Clock B | Differential |
| LL | J | Local Loopback | Unbalanced |
| RLB | BB | Remote Loopback | Unbalanced |
| TM | K | Test Mode | Unbalanced |
| - | L | Test Pattern | Unbalanced |
ITU {International Telecommunication
Union}
CCITT is the old name for the ITU standards group
Electronic Industries Alliance
{EIA}
Telecommunications Industry
Association {TIA}
V.11: Electrical characteristics for balanced double-current interchange circuits operating at data signalling rates up to 10 Mbit/s
Exar {Single Chip V.35 Transceiver IC}
Texas Instruments 'TI' {V.35 ICs}
Also refer to TeleCom IC Manufacturers
Memory Chip IC Manufacturers
Processor Chip
Manufacturers
Glue Logic IC
Manufacturers
For a list of all possible companies; Refer here
for a general listing of Component Manufacturers, listed in order of company first name.
{Back to V.35 Interface Bus Index}
Engineering Design Key words for this page: V.35, ISO 2593,CCITT,
Balanced differential Cable Bus, Electrical Standard, Interface Standard,
Specification,
Electrical Interface, Semiconductor IC manufacturers,
Physical Interface, Engineering Description, Characteristics, Device,
Manufacturers, V.35 interface
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