BS 7378-3:1998
使用2号数字存取信号传输系统(DASS 2)经CCITT推荐标准G.703的2048千位/秒接口的公共电信系统连接装置.与信号传输系统相关的信道(CASS)连接装置要求

Apparatus for connection to public telecommunications systems using the Digital Access Signalling System No. 2 (DASS 2) via a 2048 kbit/s CCITT Recommendation G.703 interface - Requirements for apparatus for connection to Channel Associated Signalling Sys

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标准号

BS 7378-3:1998

发布

1998年

发布单位

英国标准学会

当前最新

BS 7378-3:1998

 

 

适用范围

This part of BS 7378 specifies requirements for apparatus for connection to public telecommunications systems using channel associated signalling systems (CASS). These requirements apply to all such apparatus, irrespective of whether the apparatus provides additional interfaces, telecommunications services or functions. NOTE 1 "Connection to public telecommunications systems" means both direct connection to a network termination point (NTP) and indirect connection where interworking occurs by means of the applicable NTP via one or more items of intervening apparatus. The requirements made in this part of BS 7378 cover call set-up and clearing. They do not cover any supplementary services requirements that might exist. Requirements are specified in terms of apparatus performance at the interface at the apparatus terminations (see 4.1). The requirements are general design requirements intended to prevent interference with the PTOs' networks and with other users, but compliance is not intended to ensure full compatibility with CASS and will not necessarily ensure that the apparatus is satisfactory for the user's purpose. NOTE 2 In addition to the design requirements specified in this standard, the requirements of other product standards may apply depending on the function of the apparatus. NOTE 3 If the apparatus is to be connected to, or to interwork with, any service run by public telecommunications operators, it will have to meet the approval requirements applicable to that service. The requirements for the safety of the public telecommunications systems from electrical conditions originating in the connected apparatus are not specified in this standard.

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