CCNA Voice Summary – Part 7

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Cisco CME (Cisco Unified Communication Express/ Call Manager Express)

Designed for enterprise branch offices and small medium businesses. It runs on a router. Supports a max of 450 IP phones but realistically 100 phones.  You can get voicemail using Unity Express (CUE) AIM card and the Network Module NM card. AIM – flash memory and smaller capacity.  Runs on Cisco ISR 2800, 2900, 3800 etc. Router can be configured via command line, Web UI and Cisco Configuration Professional Configuration CCP. It can be used to provide high availability fallback for large and branch offices using CUCM. This is Survivable Remote Site Telephony SRST. In SRST the phones fall back to operating on the local router. ME can provide 3rd party computer telephony integration. WE can use it as a single site or multi-site deployment. There is no clustering (active/active) but we can have HSRP as standby CME. CME is completely independent even during SRST. CME can run integrated directory and presence services. Interworks with CUCM. Does not integrate with CUPS. CME is just like a voice gateway with the ability to register phones on it. It can support remote phones

 CME Features:

It is a CPE. IT has divide control for VOIP endpoints with SIP and Skinny. Provides directory services, MOH server and conferencing server. Custom applications using TCL script e.g. BACD – basic auto attendant.

CME Traffic Flow.

SIP / SCCP signaling between the endpoints and CME only and not between endpoints directly.

RTP Media flows between the endpoints only.

CME Router Specs:

ISR- G2 – 2901 – 35 PHONES – 0 SM Service Module slots – up to 8 T1/E1

ISR- G2 – 2911 – 50 PHONES – 1 SM slots – up to 12 T1/E1

ISR- G2 – 2921 – 100 PHONES – 1 SM slots – up to 12 T1/E1

ISR- G2 – 2951 – 150 PHONES – 2 SM slots – up to 16 T1/E1

ISR- G2 – 3925 – 250 PHONES – 2 SM slots – up to 16 T1/E1

ISR- G2 – 3945 – 350 PHONES – 4 SM slots – up to 24 T1/E1

ISR- 1861 – 15 PHONES – 0 NM slots

ISR- 2801 – 25 PHONES – 0 NM slots

ISR- 2811 – 35 PHONES – 1 NM slots

ISR- 2821 – 50 PHONES – 1 NM slots

ISR- 2851 – 100 PHONES – 2 NM slots

ISR- 3825 – 175 PHONES – 2 NM slots

ISR- 3845 – 250 PHONES – 4 NM slots

RISR- 3250 – 20 PHONES – 0 NM slots

RISR- 3270 – 48 PHONES – 0 NM slots

Cisco Unified Communications 500 (UC500)

All in one unit. Built in PoE – up to 8 ports. Built in Router / Switch / Wireless / VPN / Firewall.

Unified Communication Manager Business Edition

Scalability up to 500 IP Phones. Combines Call Manager, Unity Connection and Unified Mobility into one box.

It has no redundancy.

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