Chapter 5 Specifications; General; Line Control Characteristics; Table 5-1 Line Control Characteristics - NEC Neax 2000 IVS System Manual

CHAPTER 5 SPECIFICATIONS

1. GENERAL

This chapter explains the MCI characteristics and the data transmission protocol.

2. LINE CONTROL CHARACTERISTICS

The data link hardware consists of a RS-232C serial interface to the PBX.
ITEM
Data Rate:
Operating Mode:
Electrical Interface Characteristic:
Signal Form:
Interface Distance:
Word Framing:
Parity* VRC:
Frame Contents:
Control:
Priority Sequence:
*VRC : Vertical Redundancy Check

Table 5-1 Line Control Characteristics

1200, 2400, 4800, 9600 bps asynchronous, software selectable
Half duplex
EIA RS-232C electrical standard interface
EIA RS-404
Max. 15 m (49.2 ft.) between PBX and VMS (without modem)
Note: When modems are used, full duplex asynchronous type modems are re-
quired.
10 bits (1 start, 7 data, 2 stop)
No parity, even parity, odd parity; selected by PBX system data
US ASCII 7-bit codes
Contention
Primary station: PBX
Secondary station: VMS
ND-45895 (E)
DESCRIPTION
SPECIFICATIONS
CHAPTER 5
Page 37
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