HP 480-0005-00-15 manual WAN Cards, DS1 WAN Card with DSP module

Chapter 2: Hardware Components

WAN Cards

WAN cards are boards inserted in the chassis’ front slots to provide all intelligent processing for accessing the network via T1 or E1 lines. There are three types of WAN cards: DS1, T1 and E1.

When a WAN card is inserted in a slot, it connects to an associated Rear Transition Module (RTM) in the rear of chassis. The transition module is inserted into the rear of the chassis and corresponds to the card in the front slot; it provides the physical cabling and external interface connections.

For the CMS960 (8 slot) unit, the WAN cards can be populated starting with slot number 8, (the top slot), then the second WAN card will go in slot 7, and downward until slot 5. For CMS240 (2 slot) a WAN card can be inserted in the slot not populated with the CPU card.

For the purposes of this document, the term “WAN” card indicates the WAN application card and transition module as a single unit.

See below for a detailed description of each card.

DS1 WAN Card (with DSP module)

NOTE: The DS1 card is available for Release P1.4.x and higher.

CAUTION: Use the DS1 card only with the rear transition module supplied; do not use with the T1 or E1 board rear modules. Doing so may cause damage to both the cards and the chassis.

The DS1 WAN card is inserted in the chassis front slots to provide all intelligent processing for accessing the network via T1 or E1 lines. Each card provides eight DS1 span lines, for connection to either T1 or E1 trunks, along with the DSP (see below) module. For the Tenor CMS (14 slot), the maximum of four DS1 cards are supported per chassis.

The DSP (Digital Signal Processor), an interchangeable part of the DS1 card, is a signal processing module. The DSP provides the required signal processing functions to implement VoIP. The DSP module compresses voice data and generates voice packets using PacketSaver, Quintum’s exclusive multiplexing technology.

Each DS1 supports up to two DSP modules; each module supports up to 120 voice channels. Although appli- cation-specific, the number of calls going VoIP determines if both DSP modules will be required. In general, two DSP modules are required to fully utilize one DS1 card. See Chapter 8: Diagnostics/Maintenance for information about removing/adding DSP modules.

When a DS1 card is inserted in a slot, it connects to an associated transition module inserted in the rear of the chassis in the same slot number. The transition module provides the physical interface for WAN connections.

Each DS1 card (see Figure 2-20)provides eight RJ-48 jacks on the rear of the card for connections to a line side (PBX) or other customer equipment via upstream T1 or E1 lines, or to the trunk side (PSTN) via down- stream T1 or E1 lines. Each T1 line provides 24 channels. For each T1 interface, there are two types of signal- ing supported: Channel Associated Signaling (CAS) and Common Channel Signaling (CCS). For T1 using CAS, channels 1-24 are available; for T1 using CCS, channels 1-23 are available. Each E1 line provides 30B channels and 1D signaling channel. For each E1 interface, there are two types of signaling supported: Channel Associated Signaling (CAS) and Common Channel Signaling (CCS).

A crossover cable is required when connecting to a Line side (PBX) interface (when supplied by Quintum, this is a red RJ-45 cable). A straight cable is required when connecting to the trunk side (PSTN) interface (when supplied by Quintum, this is a green RJ-45 cable).

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