Avaya Index (DASS II) Cassette 15 channel (Refurbished)

Product Description

The DASS II Cassette provides the interface for connection of one DASS II line of up to 30 channels from the public network provider. DASS II is a UK standard protocol used by all network providers and is provided on a Primary Rate Interface (PRI) which consists of a 2 Megabit pipe (a digital connection). The pipe consists of 30 Bearer channels each channel being the equivalent of one trunk line. 32 channels x 64K/bit = 2,048 bytes, hence the name 2 Megabit (or 2 Meg). DASS II circuits are commonly referred to as digital trunks.
The cassette is available in three variants: 30, 15 and 8 channel options. The UK tariffs for digital trunks enable a user with an eight line requirement to install DASS II more cost effectively than an analogue option. Thus the smaller user can now access all the benefits of a digital service, eg. DDI (Direct Dialling In).