Remote Analog Sector, Point-to-Point

Create a Remote Sector of Ericsson 880/882 Analog Transceiver Modules at a Mini-cell, Using the Point-to-Point Method

Problem
A developing business park needs a new analog cell sitecell site. The traffic expected cannot justify the cost associated with an macro-cell sitemacro-cell site. Cell enhancers and micro-cells cannot provide the quality needed to attract new customers or pull customers from the competitive B-carrier.

Solution
Configure Coastcom's analog Mini-cell equipment to support analog 880/882 transceivers, MCC and MLOC radio with remote alarm capability. The equipment consists of two D/I Mux III special T1 multiplexers equipped with Dual 4-Wire E & M channel cards and a CEL1 SDCU channel card. by installing a frame(s) of Ericsson transceivers at the remote Mini-cell, and co-locating the Coastcom equipment, a remote sector can be established to an existing Ericsson Donor cell up to 50 miles away. Savings in Ericsson hardware and T1 facilities can reduce deployment significantly.

How Does It Work?
The CEL1 SDCU is a special data card that interfaces to the MDIO bus in the EMRP or EMDM Ericsson control equipment. The 4-Wire E & M channel cards connect both the VF paths and the remote alarms to the Donor-cell. Typical configurations of 6 to 14 voice channels connect to the donor over a single T1 facility. A second T1 can be added if expansion is needed. The SDM channel card can be used as an option to extend the TW port of the IOIM to the Mini-cell, providing access to the MTSO for control purposesSDM. The ericsson Chennel Tester can be used in this configuration by installing it in the transceiver radio rack at the Mini-cell.

What Actually Occurs?
The Mini-cell behaves exactly as a macro-cell sector by supporting both hand-off and hand-over functionshand-offhand-over. MTSO programming is similar to activation of a cell sector where all analog MVCs, neighbor sectors, and cells are defined. The MCC and MLOC perform the same functions in the Mini-cell, but attach remotely to an EMRP/EMDM at the Donor-cell site. The CEL1 SDCU receives data from the MDIO and transfers the data transmission to the CEL1 SDCU in the Mini-cell. The CEL1 SDCU, in turn, passes the data to an MD bus cable connected to the transceiver radio rack.

Coastcom's 4-Wire E & M cards 4-Wire E & M connect between the transceivers and the D4 D4at the Donor-cell using unused channels back to the MTSO.

Each external alarm contact closure at the Mini-cell switches a ground condition groundingto a pre-determined "M" lead of a voice channel. This activation extends over the D/I Mux III link to the Donor-cell where the "E" lead of the channels activates an IOIM contact by grounding the battery wire of the pair. The IOIM thereby supports external alarm activation at the Mini-cell as well as the Donor-cell.

How Do You Set It Up?
The "point-to-point" method, illustrated in figure c1, is used when there sufficient unused channels or DS0s in the Ericsson D4 at the Donor. The drop and insert method is used when there are insufficient channels available and you would need to provision a new T1 between the MTSO and the Donor cell site. The drop and insert option is used to connect to a "compact" MTSO or DACS system located at the MTSO..

What Information Do You Need?

1. How many MVC voice channels do you need at the Mini-cell, and how many are you already using at the donor?

2. What is the distance between the donor and Mini-cell sites, and what medium are you using (microwave, fiber, or local phone company T1)?

3. How many sectors are you planning to deploy at the Mini-cell?

4. Are you using compact or non-compact hardware, and what contingency requirements do you have at the donor (redundant EMDM/EMRPs, STRs, power)?

Remember that you will need to order the the transceiver radio rack(s), the antenna, and power systems.

Remote Analog Sector, Drop-and-Insert

Creating Three Remote Sectors at a Mini-cell, Using the Drop-and-Insert Method

Problem
A new freeway intersection needs a three-sector cell site. The traffic expected cannot justify the cost associated with an Ericsson macro-cell site. Cell enhancers and micro-cells cannot provide the quality needed to support the application or pull customers from the competitive B carrier.

Solution
Coastcom's analog Mini-cell equipment can support 880/882 analog transceivers tranceivers, and MCC and MLOC radios with remote alarm capabilityMCC radios MLOC radios. Equipment consists of two D/I Mux III special T1 multiplexers equipped with dual 4-Wire TO channel cards and a CEL1 SDCU channel card. By installing transceivers at the remote Mini-cell and co-locating the Coastcom equipment installation, three remote sectors can be established to an existing Ericsson Donor-cell up to 50 miles away. Savings in hardware and T1 facilities can reduce deployment costs significantly.

How Does It Work?
The CEL1 SDCU is a special data card that interfaces to the MDIO bus MDIO bus in the EMRP or EMDM control equipment. The 4-Wire TO channel cards provide MVC connections MVC connectionsto the MTSO. Typical configurations of 6 to 20 voice channels are connected to the Donor over a single T1 facility, and then are connected directly over a T1 to the MTSO (Compact). The SDM channel card can be used as an option to extend the TW port of the IOIM to the Mini-cell, providing access to the MTSO for control. The Ericsson Channel Tester can be used in this configuration by installing it in the transceiver radio rack at the Mini-cell.

Figure c1. Remote Sector Extension to a Mini-cell "Point-to-Point"

Figure c2. Remote-Sector Extension to a Mini-cell "Drop and Insert"

What Actually Occurs?
The Mini-cell behaves exactly like a macro cell sector, supporting both hand-off and hand-over functions. MTSO programming is similar to activation of a cell site sector where all analog MVCs, neighbor sectors, and cells are defined. The MCC and MLOC transceivers per sector perform the same functions in the Mini-cell, but attach remotely to an EMRP/EMDM at the Donor-cell site. The CEL1 SDCU receives data from the MDIO and transfers the data transmission to the CEL1 SDCU in the Mini-cell. It, in turn, passes the data to an MD bus cable connected to the transceiver radio rack.

Coastcom's 4-Wire TO cards connect to the 880/882 transceivers, and use DS0 channels to connect to MTSO via the Donor-cell.

How Do You Set It Up?
The "drop-and-insert" method shown in figure c2 is used when there are insufficient channels available and you would need to privision a new T1 between the MTSO and the Donor-cell site. This option is udes to connect to a "compact" MTSO or DACS system at the MTSO.

In drop-and-insert configuration, the MDIO data drop out at the Donor-cell site, but the VF channels are passed through the D/I Mux III at the donor site to the T1 facility, returning directly to the MTSO. Remote alarms are supported over an alarm unit that terminates up to 16 and interfaces to an SDM channel card in the D/I Mux III. The alarm unit at the Donor provides the contact closure(s) to the IOIM, should alarms be activated at the Mini-cell.

What Information Do You Need?

1. How many MVC voice channels do you need at the Mini-cell, and how many are you already using at the donor?

2. What is the distance between the donor and Mini-cell sites, and what medium is used (microwave, fiber, or local phone company T1)?

3. How many sectors are you planning to deploy at the Mini-cell?

4. Are you using compact or non-compact hardware, and what contingency requirements do you have at the donor (redundant EMDM/EMRPs, STRs, power)?

To complete the electronics needed for the Mini-cell, you will need to order the transceiver radio rack(s), the antenna, and power systems. A Mini-cell system is tailored to meet your needs.

Multiple Remote Sectors for "Fill-In" Applications

Creating Multiple Remote Sectors for "Fill-In" Applications Over a Single T1 Facility

Problem
A section of freeway suffers from marginal coverage with many complaints of dropped calls or automatic roaming to the B-carrier. Marketing has asked you to focus on a solution, but costs need to be contained. Two cell sites are needed to adequately cover this area and maintain the quality expected by your customers. An extender is not an option because you don't want to have to re-engineer this section when future growth exceeds present capacity.

Solution
Coastcom's analog Mini-cell equipment supports analog 880/882 transceivers -- MCC and MLOC with remote alarm capability. The equipment consists of three D/I Mux III special T1 multiplexers equipped with dual 4-Wire E & M channel cards, and two CEL1 SDCU data link(s). By installing a frame(s) of transceivers at each remote Mini-cell, and co-locating the Coastcom equipment, two remote sectors are established to an existing Donor cell up to 50 miles away, reducing hardware and T1 deployment costs significantly.

How Does It Work?
The CEL1 SDCU is a special data card that interfaces to the MDIO bus in the EMRP or EMDM control equipment. The 4-Wire E & M channel cards provide two functions, connecting both the VF paths and the remote alarms back to the Donor cell. Typical configurations of 7 to 12 voice channels per Mini-cell are connected back to the Donor over a single T1 facility using microwave, fiber optics, or a T1 through the LEC. Expansion to over 16 voice channels or even digital TDMA can easily be accomplished by adding a second T1. The SDM channel card s used as an option to extend the TW port of the IOIM to the Mini-cell providing access to the MTSO for control purposes. A channel tester can also be used in this configuration by installing it in the transceiver radio rack at the Mini-cell locations.

Figure c3. Two Mini-cells Extended as Two Sectors "Drop and Insert" (A)

What Actually Occurs?
The Mini-cell behaves exactly as a macro-cell sector by supporting both hand-off and hand-over functions. MTSO programming defines all analog MVCs, neighbor sectors, and cells. The MCC and MLOC perform the same functions in the Mini-cell, but attach remotely to an EMRP/EMDM at the Donor cell site. The CEL1 SDCU receives data from the MDIO and transfers data transmission to the CEL1 SDCU in the Mini-cell. The CEL1 SDCU, in turn, passes the data to an MD bus cable connected to the transceiver radio rack.

The 4-wire voice connections from the 880/882 transceivers use dual channel 4-wire TO cards in the D/I Mux III, passing over the T1 facility directly to the MTSO, thereby bypassing the Ericsson D4 at the donor site. Up to 16 remote alarms are terminated over an alarm unit that interfaces to a pSDM channel card in the D/I Mux III. The alarm unit at the Donor provides the contact closure(s) to the IOIM should alarms be activated at the Mini-cell.

How Do You Set It Up?
There are two set-up configuration options: "drop-and-insert" as illustrated in figure c3, or if excess capacity exists on the initial T1 facility at the Donor, then a special TTU can be added as shown in figure c.4. This configuration shares the VF channels on a single T1 among the Donor and Mini-cells. Use Drop-and-Insert when there are insufficient channels available and you would need to provision a new T1 between the MTSO and the Donor cell site. This option can be used to connect a "compact" MTSO or DACS located at the MTSO.

Figure c4. Two Mini-cells Extended as Two Sectors "Drop and Insert" (B)

What Information Do You Need?

1. How many MVC voice channels do you require at each Mini-cell, and how many are you already using at the donor?

2. What is the distance between the donor and Mini-cell sites, and what is the medium (microwave, fiber, or local phone company T1)?

3. How many sectors are you planning to deploy at each Mini-cell?

4. Are you using compact or non-compact hardware, and what contingency requirements do you have at the donor (redundant EMDM/EMRPs, STRs, power)?

5. What configuration best serves your needs -- a dedicated T1 for the Mini-cells, or a TTU for a shared configuration?

To complete the electronics needed for the Mini-cell, you will need to order the transceiver radio rack(s), the antenna, and power systems.